Rechargeable zinc-ion batteries have emerged as one of the most promising candidates for large-scale energy storage applications due to their high safety and low cost.However,the use of Zn metal in batteries suffers f...Rechargeable zinc-ion batteries have emerged as one of the most promising candidates for large-scale energy storage applications due to their high safety and low cost.However,the use of Zn metal in batteries suffers from many severe issues,including dendrite growth and parasitic reactions,which often lead to short cycle lives.Herein,we propose the construction of functional organic interfacial layers(OIL)on the Zn metal anodes to address these challenges.Through a well-designed organic-assist pre-construction process,a densely packed artificial layer featuring the immobilized zwitterionic molecular brush can be constructed,which can not only efficiently facilitate the smooth Zn plating and stripping,but also introduce a stable environment for battery reactions.Through density functional theory calculations and experimental characterizations,we verify that the immobilized organic propane sulfonate on Zn anodes can significantly lower the energy barrier and increase the kinetics of Zn^(2+)transport.Thus,the Zn metal anode with the functional OIL can significantly improve the cycle life of the symmetric cell to over 3500 h stable operation.When paired with the H_(2)V_(3)O_(8)cathode,the aqueous Zn-ion full cells can be continuously cycled over 7000 cycles,marking an important milestone for Zn anode development for potential industrial applications.展开更多
Aqueous rechargeable zinc ion batteries are regarded as a competitive alternative to lithium-ion batteries because of their distinct advantages of high security,high energy density,low cost,and environmental friendlin...Aqueous rechargeable zinc ion batteries are regarded as a competitive alternative to lithium-ion batteries because of their distinct advantages of high security,high energy density,low cost,and environmental friendliness.However,deep-seated problems including Zn dendrite and adverse side reactions severely impede the practical application.In this work,we proposed a freestanding Zn-electrolyte interfacial layer composed of multicapsular carbon fibers(MCFs)to regulate the plating/stripping behavior of Zn anodes.The versatile MCFs protective layer can uniformize the electric field and Zn^(2+)flux,meanwhile,reduce the deposition overpotentials,leading to high-quality and rapid Zn deposition kinetics.Furthermore,the bottom-up and uniform deposition of Zn on the Zn-MCFs interface endows long-term and high-capacity plating.Accordingly,the Zn@MCFs symmetric batteries can keep working up to 1500 h with 5 mAh cm^(−2).The feasibility of the MCFs interfacial layer is also convinced in Zn@MCFs||MnO_(2) batteries.Remarkably,the Zn@MCFs||α-MnO_(2)batteries deliver a high specific capacity of 236.1 mAh g^(−1)at 1 A g^(−1)with excellent stability,and maintain an exhilarating energy density of 154.3 Wh kg^(−1) at 33%depth of discharge in pouch batteries.展开更多
Heterojunction is regarded as a crucial step toward realizing high-performance devices,particularly,forming gradient energy band between heterojunctions benefits self-powered photodetectors.Therefore,in this paper,the...Heterojunction is regarded as a crucial step toward realizing high-performance devices,particularly,forming gradient energy band between heterojunctions benefits self-powered photodetectors.Therefore,in this paper,the synthesis of CsPbI3 nanorods(NRs)and its application as the interfacial layer in high-performance,all-solution-processed self-powered photodetectors are presented.For the bilayer photodetector ITO/ZnO(100 nm)/PbS-TBAI(150 nm)/Au,a responsivity of 3.6 A/W with a specific detectivity of 9.8×10^(12)Jones was obtained under 0.1 mW/cm^(2)white light illumination at zero bias(i.e.in self-powered mode).Meanwhile,the photocurrent was enhanced to an On/Off current ratio of 105 at zero bias with an open circuit voltage of 0.53 V for trilayer photodetector ITO/ZnO(100 nm)/PbSTBAI(150 nm)/CsPbI3(250 nm)/Au,in which the CsPbI3 NRs layer works as the interfacial layer.As a result,a specific detectivity of 4.5×10^(13)Jones with a responsivity of 11.12 A/W was obtained under0.1 mW/cm^(2) white light illumination,as well as the rising/decaying time of 0.57 s/0.41 s with excellent stability and reproducibility upto four weeks in air.The enhanced-performance is ascribed to the mismatch bandgap between PbS-TBAI/CsPbI_(3)interface,which can suppress the carrier recombination and provide efficient transport passages for charge carriers.Thus,it provides a feasible and efficient method for high-performance photodetectors.展开更多
The practical application of rechargeable lithium metal batteries(LMBs) encounters significant challenges due to the notorious dendrite growth triggered by uneven Li deposition behaviors. In this work,a mechanically r...The practical application of rechargeable lithium metal batteries(LMBs) encounters significant challenges due to the notorious dendrite growth triggered by uneven Li deposition behaviors. In this work,a mechanically robust and single-ion-conducting interfacial layer, fulfilled by the strategic integration of flexible cellulose acetate(CA) matrix with rigid graphene oxide(GO) and Li F fillers(termed the CGL layer), is rationally devised to serve as a stabilizer for dendrite-free lithium(Li) metal batteries. The GCL film exhibits favorable mechanical properties with high modulus and flexibility that help to relieve interface fluctuations. More crucially, the electron-donating carbonyl groups(C=O) enriched in GCL foster a strengthened correlation with Li^(+), which availably aids the Li^(+)desolvation process and expedites facile Li^(+)mobility, yielding exceptional Li^(+) transference number of 0.87. Such single-ion conductive properties regulate rapid and uniform interfacial transport kinetics, mitigating the growth of Li dendrites and the decomposition of electrolytes. Consequently, stable Li anode with prolonged cycle stabilities and flat deposition morphologies are realized. The Li||LiFePO_(4) full cells with CGL protective layer render an outstanding cycling capability of 500 cycles at 3 C, and an ultrahigh capacity retention of 99.99% for over 220 cycles even under harsh conditions. This work affords valuable insights into the interfacial regulation for achieving high-performance LMBs.展开更多
The flexibility of organic photovoltaics(OPVs)has attracted worldwide attention in recent years.To realize the bending-stability of OPVs,it is necessary to put forward the bending-stability of interfacial layer.A nove...The flexibility of organic photovoltaics(OPVs)has attracted worldwide attention in recent years.To realize the bending-stability of OPVs,it is necessary to put forward the bending-stability of interfacial layer.A novel bendable composite is explored and successfully applied as an electron transport layer(ETL)for fully-flexible OPVs.We incorporated poly(vinylpyrrolidone)(PVP)into conjugated electrolytes(CPE)to composite a bendable ETL for high-performance OPVs devices.Fortunately,the devices based on PVP-modified CPE exhibited better device performances and more excellent mechanical properties of bendability.The fullerene-free OPVs based on PM6:IT-4 F with CPE@PVP as ETLs yield the best power conversion efficiency(PCE)of 13.42%.Moreover,a satisfying efficiency of 12.59%has been obtained for the fully-flexible OPVs.As far as we know,this is one of the highest PCE for fully-flexible OPV based PM6:IT-4 F system.More importantly,the flexible OPVs devices can retain more than 80%of its initial efficiency after 5000 bending cycles.Furthermore,among various curvature radii,the mechanical properties of the device based on CPE@PVP are superior to those of the device based on bare CPE as ETL.These findings indicate that the functional flexibility of CPE as a cathode interfacial layer is an effective strategy to fabricate high-performance flexible devices in the near future.展开更多
Lithium metal anode is considered the alternative to graphite anode due to its ultra-high theoretical capacity of 3860 mAh·g^(-1).However,serious Li dendrite growth and drastic electrolyte side reactions restrain...Lithium metal anode is considered the alternative to graphite anode due to its ultra-high theoretical capacity of 3860 mAh·g^(-1).However,serious Li dendrite growth and drastic electrolyte side reactions restrain the commercial application of Li metal anode.In this work,a Li_(3)Bi/LiF interfacial layer is constructed on the surface of the Li metal anode by a spontaneous substitution reaction.The composite interfacial layer possesses excellent ionic conductivity,high mechanical strength,and great electrolyte wettability,which ensures fast Li-ion transfer and uniform Li deposition of the Li_(3)Bi/LiF@Li anode.Impressively,the Li_3Bi/LiF@Li symmetric cell provides a cycle life of more than 400 h with only 73 mV voltage polarization at 10 mA·cm^(-2).By pairing with commercial NCM622 cathode,the Li_(3)Bi/LiF@Li full cell exhibits a long cycle at a rate of 2 C.展开更多
Dissimilar metals TIG welding-brazing of aluminum alloy and non-coated stainless steel was investigated. The resultant joint was characterized in order to identify the phases and the brittle intermetallic compounds （...Dissimilar metals TIG welding-brazing of aluminum alloy and non-coated stainless steel was investigated. The resultant joint was characterized in order to identify the phases and the brittle intermetallic compounds （IMCs） in the interracial layer by optical metalloscope （OM）, scanning electron microscopy （SEM） and energy dispersive spectrometer （ EDS） , and the cracked joint was analyzed in order to understand the cracking mechanism of the joint. The results show that the microfusion of the stainless steel can improve the wetting and spreading of liquid aluminum base filler metal on the steel suuface and the melted steel accelerates the formation of mass of brittle IMCs in the interracial layer, which causes the joint cracking badly. The whole interfacial layer is 5 -7 μm thick and comprises approximately 5μm-thickness reaction layer in aluminum side and about 2 μm-thickness diffusion layer in steel side. The stable Al-rich IMCs are formed in the interfacial layer and the phases transfer from （ Al ＋ FeAl3 ） in aluminum side to （ FeAl3 ＋ Fe2Al5 ） and （ α-Fe ＋ FeAl） in steel side.展开更多
Fe-Cr-Ni/Al-Si-Cu-Ni-Mg composite was taken as the experimental material. The chemical composition of interfacial layer was tested. The generation mechanism and influence of interfacial layer on the composite were ana...Fe-Cr-Ni/Al-Si-Cu-Ni-Mg composite was taken as the experimental material. The chemical composition of interfacial layer was tested. The generation mechanism and influence of interfacial layer on the composite were analyzed. The results indicated that the generation of interfacial layer is sensitive to temperature. Interfacial layer will generate rapidly when temperature reaches 500 ℃ or above. The interfacial layer is mainly composed of Al, Si, Cu, Fe, and Cr, element Ni distributes at the outward of the interfacial layer for the precipitate of Ni later than Si and Cu, and there is almost no diffusion of Ni during the solution treatment. During heat treatment process, unequal quantity changing of metal atom results in disperse or concentrated vacancies or holes near the matrix. The existence of interfacial layer will induce a decrease of compression strength and plasticity at room temperature and an increase of strength at higher temperature comparing with composite without interfacial layer.展开更多
Self-doping cathode interfacial layers(CILs) with both favorable electron injection and transport characteristics meet the key requirement for realizing high-performance optoelectronic devices with simplified structur...Self-doping cathode interfacial layers(CILs) with both favorable electron injection and transport characteristics meet the key requirement for realizing high-performance optoelectronic devices with simplified structures. Herein, four different polypyridinium salts with tunable backbones, side chains and counterions are elaborately designed to afford them desirable film-forming property, polarity, structural rigidity and self-doping feature. All-solution-processed red quantum dot light-emitting diodes(QLEDs) employing them as bifunctional CILs render remarkably improved device performances in contrast to the typical CIL material of poly[(9,9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)](PFN).The maximum external quantum efficiency of 2.74% achieved in this work represents one of the best values among the all-solution-processed QLEDs with individual organic CILs.展开更多
We propose a modified thermal oxidation method in which an Al2O3 capping layer is used as an oxygen blocking layer （OBL） to form an ultrathin GeOx interracial layer, and obtain a superior Al2O3/GeOx/Ge gate stack. T...We propose a modified thermal oxidation method in which an Al2O3 capping layer is used as an oxygen blocking layer （OBL） to form an ultrathin GeOx interracial layer, and obtain a superior Al2O3/GeOx/Ge gate stack. The GeOx interfacial layer is formed in oxidation reaction by oxygen passing through the Al2O3 OBL, in which theAl2O3 layer could restrain the oxygen diffusion and suppress the GeO desorption during thermal treatment. The thickness of the GeOx interfacial layer would dramatically decrease as the thickness of Al2O3 OBL increases, which is beneficial to achieving an ultrathin GeOx interfacial layer to satisfy the demand for small equivalent oxide thickness （EOT）. In addition, the thickness of the GeOx interfacial layer has little influence on the passivation effect of the Al2O3/Ge interface. Ge （100） p-channel metal- oxide-semiconductor field-effect transistors （pMOSFETs） using the Al2O3/GeOx/Ge gate stacks exhibit excellent electrical characteristics; that is, a drain current on-off （Ionloft） ratio of above 1 104, a subthreshold slope of - 120 mV/dec, and a peak hole mobility of 265 cm2/V.s are achieved.展开更多
There have already been several interface models for the analyses of thin interfacial layers in bonded materials. To distinguish their corresponding advantages or limitations, a comparative study is carried out, and a...There have already been several interface models for the analyses of thin interfacial layers in bonded materials. To distinguish their corresponding advantages or limitations, a comparative study is carried out, and a new constitutive-based interface model is proposed. Through numerical examinations, the limitations of typical models are clarified. It is found that the new interface model is an efficient and accurate model, by which both the traction and the displacement jumps across the modelled interface with the thickness of zero are allowed, and the stresses within the interracial layer can also be analyzed.展开更多
Large-scale components of steel and aluminum alloys(Fe-Al)with high bonding strength are highly needed from space exploration to the fabrication of transportation systems.The formation of detrimental intermetallic com...Large-scale components of steel and aluminum alloys(Fe-Al)with high bonding strength are highly needed from space exploration to the fabrication of transportation systems.The formation of detrimental intermetallic compounds at the Al-Fe interface has limited the application range of the Fe-Al components.The modified friction stir additive manufacturing was developed for fabricating large-scale Fe-Al compo-nents with homogenously distributed interfacial amorphous layers rather than detrimental intermetallic compounds.The interfacial amorphous layers comprised an Mg-O rich amorphous layer<20 nm in thick-ness and an Al-Fe-Si amorphous layer<120 nm in thickness.The interfacial amorphous layers exhibited high thermal stability and did not change even after the post-processing heat treatment of heating at 500℃ for 20 min and aging at 170℃ for 7 h.The tensile strengths of the Fe-Al tensile specimens were increased from 160 to 250 MPa after the application of the post-processing heat treatment.The fracture occurred in the aluminum alloys instead of at the dissimilar metal interface,demonstrating that high bonding strength at the Al-Fe interface was enabled by the formation of homogenously distributed interfacial amorphous layers.展开更多
Flexible energy storage plays a crucial role in the field of flexible electronics,because it provides the energy supply,and its technological advancement directly affects the performance and application scope of flexi...Flexible energy storage plays a crucial role in the field of flexible electronics,because it provides the energy supply,and its technological advancement directly affects the performance and application scope of flexible electronics.As an important flexible energy storage technology member,aqueous zinc(Zn)ion batteries(AZIBs)have garnered considerable attention due to their high safety and low cost.However,the development of flexible AZIBs is hindered by Zn metal anodes(ZMAs),where Zn is prone to growing into dendritic structures,especially in a curved state,and thus leads to battery failure.Herein,we design a robust interfacial layer(RIL)for stabilizing ZMAs in flexible AZIBs,whose introduction constructs uniform Zn ion channels and releases stress accumulation on the anode surface.Various experiments and calculations are employed to verify the effectiveness of RIL in suppressing Zn dendrite at bending states.Furthermore,a Zn|MnO_(2)flexible pouch battery with RIL is demonstrated with stable cycling performance during bending.We believe this study provides new possibilities for regulating Zn deposition under bending conditions and extends its application to flexible wearable aqueous metal batteries.展开更多
Here we report substantial effects of inserting PVD-prepared highly-conductive ultrathin WO_(x)as interfacial layer in TiN/Hf_(0.5)Zr_(0.5)O_(2)(HZO)/TiN structure on the ferroelectricity of HZO thin films.The prepare...Here we report substantial effects of inserting PVD-prepared highly-conductive ultrathin WO_(x)as interfacial layer in TiN/Hf_(0.5)Zr_(0.5)O_(2)(HZO)/TiN structure on the ferroelectricity of HZO thin films.The prepared TiN/WO_(x)/HZO/WO_(x)/TiN capacitor,exhibiting a remnant polarization(Pr)of 18.8 mC/cm^(2)at 2 MV/cm and outstanding endurance of over 3.2×10^(9)cycles under 10^(5)Hz bipolar square field cycling.Furthermore,a scalable transfer technique,in which CVD-grown few-layered graphene thin film is used as a sacrificial layer,is developed for transferring HZO-based ferroelectric stack pre-fabricated on SiO_(2)/Si substrate onto a flexible polyimide(PI)membrane,with marginal loss in the ferroelectric properties of HZO.Importantly,mechanical bending testing demonstrates excellent flexibility of TiN/WO_(x)/HZO/WO_(x)/TiN stack,with robust polarization and superb endurance properties being well-maintained even after 10^(4)cycles at a small bending radius of 2 mm.Both implementing ultrathin WO_(x)as interfacial layers and utilizing two-dimensional materials assisted transfer technique would be of great value in the development of HfO2-based flexible ferroelectric memory.展开更多
The absence of efficient ion transport pathways in composite solid-state electrolytes(CSEs)usually results in low ionic conductivity,which remains a great challenge for developing solid-state lithiummetal batteries(SL...The absence of efficient ion transport pathways in composite solid-state electrolytes(CSEs)usually results in low ionic conductivity,which remains a great challenge for developing solid-state lithiummetal batteries(SLMBs).Herein,we report achieving accelerated Li^(+)conduction in CSEs by a novel activation of the interfacial dipole layer.Polycationic ionic liquids and polyacrylonitrile with highly polar functional groups(-C≡N)are utilized to modulate the interfacial dipole layer in MOF-based CSEs,facilitating long-range pathways for the connectivity of Li^(+)conduction and enhancing rapid transport kinetics.The as-synthesized CSEs exhibit a high ionic conductivity of 0.59 mS cm^(-1)and a lithium transfer number of 0.85.The assembled SLMBs(Li/CSE/LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2))delivered a high-capacity retention of 88.7%with a minimal discharge voltage attenuation of 17.1 mV after 500 cycles(0.03 mV per cycle)at0.5 C.This work offers an effective approach to creating interpenetrating lithium-ion transport pathways with rapid ion transport kinetics for solid-state electrolytes,thereby advancing the development of solidstate lithium metal batteries.展开更多
Aqueous zinc ion batteries(ZIBs)show great potential in large-scale energy storage systems for their advantages of high safety,low cost,high capacity,and environmental friendliness.However,the poor performance of Zn m...Aqueous zinc ion batteries(ZIBs)show great potential in large-scale energy storage systems for their advantages of high safety,low cost,high capacity,and environmental friendliness.However,the poor performance of Zn metal anode seriously hinders the application of ZIBs.Herein,we use the zinc-ion intercalatable V_(2)O_(5)nH_(2)O(VO)as the interface modification material,for the first time,to on-site build a Zn^(2+)-conductive ZnxV_(2)O_(5)nH_(2)O(ZnVO)interfacial layer via the spontaneous short-circuit reaction between the pre-fabricated VO film and Zn metal foil.Compared with the bare Zn,the ZnVO-coated Zn anode exhibits better electrochemical performances with dendrite-free Zn deposits,lower polarization,higher coulombic efficiency over 99%after long cycles and 10 times higher cycle life,which is confirmed by constructing Zn symmetrical cell and Zn|ZnSO_(4)+Li_(2)SO_(4)|LiFePO_(4) full cell.展开更多
The integrative regeneration of both articular cartilage and subchondral bone remains an unmet clinical need due to the difficulties of mimicking spatial complexity in native osteochondral tissues for artificial impla...The integrative regeneration of both articular cartilage and subchondral bone remains an unmet clinical need due to the difficulties of mimicking spatial complexity in native osteochondral tissues for artificial implants.Layer-by-layer fabrication strategies,such as 3D printing,have emerged as a promising technology replicating the stratified zonal architecture and varying microstructures and mechanical properties.However,the dynamic and circulating physiological environments,such as mass transportation or cell migration,usually distort the pre-confined biological properties in the layered implants,leading to undistinguished spatial variations and subsequently inefficient regenerations.This study introduced a biomimetic calcified interfacial layer into the scaffold as a compact barrier between a cartilage layer and a subchondral bone layer to facilitate osteogenic-chondrogenic repair.The calcified interfacial layer consisting of compact polycaprolactone(PCL),nano-hydroxyapatite,and tasquinimod(TA)can physically and biologically separate the cartilage layer(TA-mixed,chondrocytes-load gelatin methacrylate)from the subchondral bond layer(porous PCL).This introduction preserved the as-designed independent biological environment in each layer for both cartilage and bone regeneration,successfully inhibiting vascular invasion into the cartilage layer and preventing hyaluronic cartilage calcification owing to devascularization of TA.The improved integrative regeneration of cartilage and subchondral bone was validated through gross examination,micro-computed tomography(micro-CT),and histological and immunohistochemical analyses based on an in vivo rat model.Moreover,gene and protein expression studies identified a key role of Caveolin(CAV-1)in promoting angiogenesis through the Wnt/β-catenin pathway and indicated that TA in the calcified layer blocked angiogenesis by inhibiting CAV-1.展开更多
A light-emitting organic solar cell(LE-OSC)with electroluminescence(EL)and photovoltaic(PV)properties is successfully fabricated by connecting the EL and PV units using a MoO_(3):Al co-evaporation interfacial layer,wh...A light-emitting organic solar cell(LE-OSC)with electroluminescence(EL)and photovoltaic(PV)properties is successfully fabricated by connecting the EL and PV units using a MoO_(3):Al co-evaporation interfacial layer,which has suitable work function and good transmittance.PV and EL units are fabricated based on poly(3-hexylthiophene)(P3HT)-indene-C60 bisadduct(IC60BA)blends,and 4,4′-bis(N-carbazolyl)biphenyl-factris(2-phenylpyridine)iridium(Ir(ppy)3),respectively.The work function and the transmittance of the MoO_(3):Al co-evaporation are measured and adjusted by the ultraviolet photoelectron spectroscopy and the optical spectrophotometer to obtain the better bi-functional device performance.The forward-and reverse-biased current density-voltage characteristics in dark and under illumination are evaluated to better understand the operational mechanism of the LE-OSCs.A maximum luminance of 1550 cd/m^(2)under forward bias and a power conversion efficiency of 0.24%under illumination(100 mW/cm^(2))are achieved in optimized LE-OSCs.The proposed device structure is expected to provide valuable information in the film conditions for understanding the polymer blends internal conditions and meliorating the film qualities.展开更多
In the present investigation,the growth kinetics of interfacial reaction layer products between cubic boron nitride(CBN) and Cu-Sn-Ti filler metal has been thoroughly investigated.Detailed morphological and compositio...In the present investigation,the growth kinetics of interfacial reaction layer products between cubic boron nitride(CBN) and Cu-Sn-Ti filler metal has been thoroughly investigated.Detailed morphological and compositional features of respective compounds have been demonstrated for a wide brazing temperature ranging from 1153 K to 1223 K.It is found that within 30 minutes brazing holding time,the reaction layer growth is largely determined by the population of Ti N via effective Ti diffusion with an activation energy of 223.51 k J/mol,leading to parabolic growth patterns.It is further revealed that TiN grows both in axial and length dimensions,which eventually extends to the forefront and covers the reaction layer.展开更多
The Ge metal-oxide-semiconductor (MOS) capacitors were fabricated with HfO2 as gate dielectric.AlON,NdON,and NdAlON were deposited between the gate dielectric and the Ge substrate as the interfacial passivation layer ...The Ge metal-oxide-semiconductor (MOS) capacitors were fabricated with HfO2 as gate dielectric.AlON,NdON,and NdAlON were deposited between the gate dielectric and the Ge substrate as the interfacial passivation layer (IPL).The electrical properties (such as capacitance-voltage (C-V) and gate leakage current density versus gate voltage (J_(g)-V_(g))) were measured by HP4284A precision LCR meter and HP4156A semiconductor parameter analyzer.The chemical states and interfacial quality of the high-k/Ge interface were investigated by X-ray photoelectron spectroscopy (XPS).The experimental results show that the sample with the NdAlON as IPL exhibits the excellent interfacial and electrical properties.These should be attributed to an effective suppression of the Ge suboxide and HfGeOx interlayer,and an enhanced blocking role against inter-diffusion of the elements during annealing by the NdAlON IPL.展开更多
基金supported by the Australian Research Council (FT180100705, DP230101579, DE240100868)CSIRO “International Hydrogen Research Collaboration ProgramRESEARCH FELLOWSHIPS”+2 种基金the National Natural Science Foundation of China (22209103)support from the “Joint International Laboratory on Environmental and Energy Frontier Materials”the “Innovation Research Team of High-Level Local Universities in Shanghai”
文摘Rechargeable zinc-ion batteries have emerged as one of the most promising candidates for large-scale energy storage applications due to their high safety and low cost.However,the use of Zn metal in batteries suffers from many severe issues,including dendrite growth and parasitic reactions,which often lead to short cycle lives.Herein,we propose the construction of functional organic interfacial layers(OIL)on the Zn metal anodes to address these challenges.Through a well-designed organic-assist pre-construction process,a densely packed artificial layer featuring the immobilized zwitterionic molecular brush can be constructed,which can not only efficiently facilitate the smooth Zn plating and stripping,but also introduce a stable environment for battery reactions.Through density functional theory calculations and experimental characterizations,we verify that the immobilized organic propane sulfonate on Zn anodes can significantly lower the energy barrier and increase the kinetics of Zn^(2+)transport.Thus,the Zn metal anode with the functional OIL can significantly improve the cycle life of the symmetric cell to over 3500 h stable operation.When paired with the H_(2)V_(3)O_(8)cathode,the aqueous Zn-ion full cells can be continuously cycled over 7000 cycles,marking an important milestone for Zn anode development for potential industrial applications.
基金supported by the National Natural Science Foundation of China(51901206)“the Fundamental Research Funds for the Central Universities”(2021QNA4003).
文摘Aqueous rechargeable zinc ion batteries are regarded as a competitive alternative to lithium-ion batteries because of their distinct advantages of high security,high energy density,low cost,and environmental friendliness.However,deep-seated problems including Zn dendrite and adverse side reactions severely impede the practical application.In this work,we proposed a freestanding Zn-electrolyte interfacial layer composed of multicapsular carbon fibers(MCFs)to regulate the plating/stripping behavior of Zn anodes.The versatile MCFs protective layer can uniformize the electric field and Zn^(2+)flux,meanwhile,reduce the deposition overpotentials,leading to high-quality and rapid Zn deposition kinetics.Furthermore,the bottom-up and uniform deposition of Zn on the Zn-MCFs interface endows long-term and high-capacity plating.Accordingly,the Zn@MCFs symmetric batteries can keep working up to 1500 h with 5 mAh cm^(−2).The feasibility of the MCFs interfacial layer is also convinced in Zn@MCFs||MnO_(2) batteries.Remarkably,the Zn@MCFs||α-MnO_(2)batteries deliver a high specific capacity of 236.1 mAh g^(−1)at 1 A g^(−1)with excellent stability,and maintain an exhilarating energy density of 154.3 Wh kg^(−1) at 33%depth of discharge in pouch batteries.
基金partially funded by the project of State Key Laboratory of Transducer Technology(SKT1404)the project of the Key Laboratory of Photoelectronic Imaging Technology and System(2017OEIOF02)Beijing Institute of Technology,Ministry of Education of Chinathe project of the Key R&D projects of the Ministry of Science and Technology(SQ2019YFB220038)。
文摘Heterojunction is regarded as a crucial step toward realizing high-performance devices,particularly,forming gradient energy band between heterojunctions benefits self-powered photodetectors.Therefore,in this paper,the synthesis of CsPbI3 nanorods(NRs)and its application as the interfacial layer in high-performance,all-solution-processed self-powered photodetectors are presented.For the bilayer photodetector ITO/ZnO(100 nm)/PbS-TBAI(150 nm)/Au,a responsivity of 3.6 A/W with a specific detectivity of 9.8×10^(12)Jones was obtained under 0.1 mW/cm^(2)white light illumination at zero bias(i.e.in self-powered mode).Meanwhile,the photocurrent was enhanced to an On/Off current ratio of 105 at zero bias with an open circuit voltage of 0.53 V for trilayer photodetector ITO/ZnO(100 nm)/PbSTBAI(150 nm)/CsPbI3(250 nm)/Au,in which the CsPbI3 NRs layer works as the interfacial layer.As a result,a specific detectivity of 4.5×10^(13)Jones with a responsivity of 11.12 A/W was obtained under0.1 mW/cm^(2) white light illumination,as well as the rising/decaying time of 0.57 s/0.41 s with excellent stability and reproducibility upto four weeks in air.The enhanced-performance is ascribed to the mismatch bandgap between PbS-TBAI/CsPbI_(3)interface,which can suppress the carrier recombination and provide efficient transport passages for charge carriers.Thus,it provides a feasible and efficient method for high-performance photodetectors.
基金National Natural Science Foundation of China (No. 22209014)5.5 Engineering Research & Innovation Team Project of Beijing Forestry University (No.BLRC 2023B05)。
文摘The practical application of rechargeable lithium metal batteries(LMBs) encounters significant challenges due to the notorious dendrite growth triggered by uneven Li deposition behaviors. In this work,a mechanically robust and single-ion-conducting interfacial layer, fulfilled by the strategic integration of flexible cellulose acetate(CA) matrix with rigid graphene oxide(GO) and Li F fillers(termed the CGL layer), is rationally devised to serve as a stabilizer for dendrite-free lithium(Li) metal batteries. The GCL film exhibits favorable mechanical properties with high modulus and flexibility that help to relieve interface fluctuations. More crucially, the electron-donating carbonyl groups(C=O) enriched in GCL foster a strengthened correlation with Li^(+), which availably aids the Li^(+)desolvation process and expedites facile Li^(+)mobility, yielding exceptional Li^(+) transference number of 0.87. Such single-ion conductive properties regulate rapid and uniform interfacial transport kinetics, mitigating the growth of Li dendrites and the decomposition of electrolytes. Consequently, stable Li anode with prolonged cycle stabilities and flat deposition morphologies are realized. The Li||LiFePO_(4) full cells with CGL protective layer render an outstanding cycling capability of 500 cycles at 3 C, and an ultrahigh capacity retention of 99.99% for over 220 cycles even under harsh conditions. This work affords valuable insights into the interfacial regulation for achieving high-performance LMBs.
基金financial support from the National Natural Science Foundation of China(Nos.51833004,22005131,51973032,21905043 and U20A20128)。
文摘The flexibility of organic photovoltaics(OPVs)has attracted worldwide attention in recent years.To realize the bending-stability of OPVs,it is necessary to put forward the bending-stability of interfacial layer.A novel bendable composite is explored and successfully applied as an electron transport layer(ETL)for fully-flexible OPVs.We incorporated poly(vinylpyrrolidone)(PVP)into conjugated electrolytes(CPE)to composite a bendable ETL for high-performance OPVs devices.Fortunately,the devices based on PVP-modified CPE exhibited better device performances and more excellent mechanical properties of bendability.The fullerene-free OPVs based on PM6:IT-4 F with CPE@PVP as ETLs yield the best power conversion efficiency(PCE)of 13.42%.Moreover,a satisfying efficiency of 12.59%has been obtained for the fully-flexible OPVs.As far as we know,this is one of the highest PCE for fully-flexible OPV based PM6:IT-4 F system.More importantly,the flexible OPVs devices can retain more than 80%of its initial efficiency after 5000 bending cycles.Furthermore,among various curvature radii,the mechanical properties of the device based on CPE@PVP are superior to those of the device based on bare CPE as ETL.These findings indicate that the functional flexibility of CPE as a cathode interfacial layer is an effective strategy to fabricate high-performance flexible devices in the near future.
基金financially supported by the National Natural Science Foundation of China (Nos.52204306 and52204319)the Natural Science Foundation for Distinguished Young Scholars of Hunan Province (No.2023JJ10044)+4 种基金the Scientific Research Fund of Hunan Provincial Education Department (Nos.21C0192 and 22A0211)the Science and Technology Planning Project of Hunan Province (No.2019RS2034)Hunan High-tech Industry Science and Technology Innovation Leading Plan (No.2020GK2072)Changsha City Fund for Distinguished and Innovative Young Scholars (No.KQ1707014)the Postgraduate Scientific Research Innovation Project of Changsha University of Science and Technology (No.CXCLY2022147)。
文摘Lithium metal anode is considered the alternative to graphite anode due to its ultra-high theoretical capacity of 3860 mAh·g^(-1).However,serious Li dendrite growth and drastic electrolyte side reactions restrain the commercial application of Li metal anode.In this work,a Li_(3)Bi/LiF interfacial layer is constructed on the surface of the Li metal anode by a spontaneous substitution reaction.The composite interfacial layer possesses excellent ionic conductivity,high mechanical strength,and great electrolyte wettability,which ensures fast Li-ion transfer and uniform Li deposition of the Li_(3)Bi/LiF@Li anode.Impressively,the Li_3Bi/LiF@Li symmetric cell provides a cycle life of more than 400 h with only 73 mV voltage polarization at 10 mA·cm^(-2).By pairing with commercial NCM622 cathode,the Li_(3)Bi/LiF@Li full cell exhibits a long cycle at a rate of 2 C.
基金Supported by National Natural Science Foundation of China （50874033）.
文摘Dissimilar metals TIG welding-brazing of aluminum alloy and non-coated stainless steel was investigated. The resultant joint was characterized in order to identify the phases and the brittle intermetallic compounds （IMCs） in the interracial layer by optical metalloscope （OM）, scanning electron microscopy （SEM） and energy dispersive spectrometer （ EDS） , and the cracked joint was analyzed in order to understand the cracking mechanism of the joint. The results show that the microfusion of the stainless steel can improve the wetting and spreading of liquid aluminum base filler metal on the steel suuface and the melted steel accelerates the formation of mass of brittle IMCs in the interracial layer, which causes the joint cracking badly. The whole interfacial layer is 5 -7 μm thick and comprises approximately 5μm-thickness reaction layer in aluminum side and about 2 μm-thickness diffusion layer in steel side. The stable Al-rich IMCs are formed in the interfacial layer and the phases transfer from （ Al ＋ FeAl3 ） in aluminum side to （ FeAl3 ＋ Fe2Al5 ） and （ α-Fe ＋ FeAl） in steel side.
基金Funded by the Program of International S&T Cooperation(No.2013DFA51230)the Opening Subject Fund of Ningbo University(No.zj1226)
文摘Fe-Cr-Ni/Al-Si-Cu-Ni-Mg composite was taken as the experimental material. The chemical composition of interfacial layer was tested. The generation mechanism and influence of interfacial layer on the composite were analyzed. The results indicated that the generation of interfacial layer is sensitive to temperature. Interfacial layer will generate rapidly when temperature reaches 500 ℃ or above. The interfacial layer is mainly composed of Al, Si, Cu, Fe, and Cr, element Ni distributes at the outward of the interfacial layer for the precipitate of Ni later than Si and Cu, and there is almost no diffusion of Ni during the solution treatment. During heat treatment process, unequal quantity changing of metal atom results in disperse or concentrated vacancies or holes near the matrix. The existence of interfacial layer will induce a decrease of compression strength and plasticity at room temperature and an increase of strength at higher temperature comparing with composite without interfacial layer.
基金the financial support from the National Natural Science Foundation of China (Nos. 51803124and 62175189)Shenzhen Science and Technology Program (Nos.KQTD20170330110107046 and JCYJ20170818143831242)+2 种基金the Instrumental Analysis Center of Shenzhen University for Analytical Supportthe funding support from the Open Project Program of Wuhan National Laboratory for Optoelectronics (No. 2019WNLOKF015)the Open Fund of Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University (No.KLPAOSM202003)。
文摘Self-doping cathode interfacial layers(CILs) with both favorable electron injection and transport characteristics meet the key requirement for realizing high-performance optoelectronic devices with simplified structures. Herein, four different polypyridinium salts with tunable backbones, side chains and counterions are elaborately designed to afford them desirable film-forming property, polarity, structural rigidity and self-doping feature. All-solution-processed red quantum dot light-emitting diodes(QLEDs) employing them as bifunctional CILs render remarkably improved device performances in contrast to the typical CIL material of poly[(9,9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)](PFN).The maximum external quantum efficiency of 2.74% achieved in this work represents one of the best values among the all-solution-processed QLEDs with individual organic CILs.
基金Project supported by the National Basic Research Program of China(Grant Nos.2011CBA00605 and 2011CBA00607)the National Natural Science Foundation of China(Grant No.61204103)the National Science & Technology Major Project of China(Grant No.2011ZX02708-003)
文摘We propose a modified thermal oxidation method in which an Al2O3 capping layer is used as an oxygen blocking layer （OBL） to form an ultrathin GeOx interracial layer, and obtain a superior Al2O3/GeOx/Ge gate stack. The GeOx interfacial layer is formed in oxidation reaction by oxygen passing through the Al2O3 OBL, in which theAl2O3 layer could restrain the oxygen diffusion and suppress the GeO desorption during thermal treatment. The thickness of the GeOx interfacial layer would dramatically decrease as the thickness of Al2O3 OBL increases, which is beneficial to achieving an ultrathin GeOx interfacial layer to satisfy the demand for small equivalent oxide thickness （EOT）. In addition, the thickness of the GeOx interfacial layer has little influence on the passivation effect of the Al2O3/Ge interface. Ge （100） p-channel metal- oxide-semiconductor field-effect transistors （pMOSFETs） using the Al2O3/GeOx/Ge gate stacks exhibit excellent electrical characteristics; that is, a drain current on-off （Ionloft） ratio of above 1 104, a subthreshold slope of - 120 mV/dec, and a peak hole mobility of 265 cm2/V.s are achieved.
基金supported by the National Natural Science Foundation of China(No.10632040)
文摘There have already been several interface models for the analyses of thin interfacial layers in bonded materials. To distinguish their corresponding advantages or limitations, a comparative study is carried out, and a new constitutive-based interface model is proposed. Through numerical examinations, the limitations of typical models are clarified. It is found that the new interface model is an efficient and accurate model, by which both the traction and the displacement jumps across the modelled interface with the thickness of zero are allowed, and the stresses within the interracial layer can also be analyzed.
基金supported by the National Natu-ral Science Foundation of China(Nos.52375396,52034005,and 51975553)the Liaoning Provincial Department of Science and Technology(No.2023JH2/101300149)+4 种基金the Shenyang Science and Technology Bureau(No.22-315-6-03)and Institute of Metal Re-search,Chinese Academy of Sciences(No.2023-ZD02-01)the Liaoning Province Excellent Youth Foundation(No.2021-YQ-01)the Program of the Youth Innovation Promotion Association of the Chi-nese Academy of Sciences(No.Y2021061)the Bintech-IMR R&D Program(No.GYY-JSBU-2022-002).
文摘Large-scale components of steel and aluminum alloys(Fe-Al)with high bonding strength are highly needed from space exploration to the fabrication of transportation systems.The formation of detrimental intermetallic compounds at the Al-Fe interface has limited the application range of the Fe-Al components.The modified friction stir additive manufacturing was developed for fabricating large-scale Fe-Al compo-nents with homogenously distributed interfacial amorphous layers rather than detrimental intermetallic compounds.The interfacial amorphous layers comprised an Mg-O rich amorphous layer<20 nm in thick-ness and an Al-Fe-Si amorphous layer<120 nm in thickness.The interfacial amorphous layers exhibited high thermal stability and did not change even after the post-processing heat treatment of heating at 500℃ for 20 min and aging at 170℃ for 7 h.The tensile strengths of the Fe-Al tensile specimens were increased from 160 to 250 MPa after the application of the post-processing heat treatment.The fracture occurred in the aluminum alloys instead of at the dissimilar metal interface,demonstrating that high bonding strength at the Al-Fe interface was enabled by the formation of homogenously distributed interfacial amorphous layers.
基金financially supported by National Natural Science Foundation of China(Nos.52472214,22409095,and 22201135)Natural Science Foundation of Jiangsu Province of China(Nos.BK20220385 and BK20230368)+2 种基金Science and Technology Program of Suzhou(No.SYG202354)Project of State Key Laboratory of Organic Electronics and Information Displays,Nanjing University of Posts and Telecommunications(Nos.GZR2022010017 and GDX2022010010)Nanjing University of Posts and Telecommunications Start-up Fund(Nos.NY222094,NY223099,and NY223054).
文摘Flexible energy storage plays a crucial role in the field of flexible electronics,because it provides the energy supply,and its technological advancement directly affects the performance and application scope of flexible electronics.As an important flexible energy storage technology member,aqueous zinc(Zn)ion batteries(AZIBs)have garnered considerable attention due to their high safety and low cost.However,the development of flexible AZIBs is hindered by Zn metal anodes(ZMAs),where Zn is prone to growing into dendritic structures,especially in a curved state,and thus leads to battery failure.Herein,we design a robust interfacial layer(RIL)for stabilizing ZMAs in flexible AZIBs,whose introduction constructs uniform Zn ion channels and releases stress accumulation on the anode surface.Various experiments and calculations are employed to verify the effectiveness of RIL in suppressing Zn dendrite at bending states.Furthermore,a Zn|MnO_(2)flexible pouch battery with RIL is demonstrated with stable cycling performance during bending.We believe this study provides new possibilities for regulating Zn deposition under bending conditions and extends its application to flexible wearable aqueous metal batteries.
基金supported by National Natural Science Foundation of China(Grant No.62374050)Hundred Talents Plan of Hebei Province(Grant No.E2018100001)Hebei University(Grant No.521000981204).
文摘Here we report substantial effects of inserting PVD-prepared highly-conductive ultrathin WO_(x)as interfacial layer in TiN/Hf_(0.5)Zr_(0.5)O_(2)(HZO)/TiN structure on the ferroelectricity of HZO thin films.The prepared TiN/WO_(x)/HZO/WO_(x)/TiN capacitor,exhibiting a remnant polarization(Pr)of 18.8 mC/cm^(2)at 2 MV/cm and outstanding endurance of over 3.2×10^(9)cycles under 10^(5)Hz bipolar square field cycling.Furthermore,a scalable transfer technique,in which CVD-grown few-layered graphene thin film is used as a sacrificial layer,is developed for transferring HZO-based ferroelectric stack pre-fabricated on SiO_(2)/Si substrate onto a flexible polyimide(PI)membrane,with marginal loss in the ferroelectric properties of HZO.Importantly,mechanical bending testing demonstrates excellent flexibility of TiN/WO_(x)/HZO/WO_(x)/TiN stack,with robust polarization and superb endurance properties being well-maintained even after 10^(4)cycles at a small bending radius of 2 mm.Both implementing ultrathin WO_(x)as interfacial layers and utilizing two-dimensional materials assisted transfer technique would be of great value in the development of HfO2-based flexible ferroelectric memory.
基金financially supported by the National Natural Science Foundation of China(22408239)the National Natural Science Foundation of China(51904193)+3 种基金the Sichuan Science and Technology Program(2024NSFSC0987)the Fundamental Research Funds for the Central Universities(No.YJ202280)support from the Australian Research Council(ARC)through the ARC Linkage project(LP200200926)ARC Discover project(DP240102176)。
文摘The absence of efficient ion transport pathways in composite solid-state electrolytes(CSEs)usually results in low ionic conductivity,which remains a great challenge for developing solid-state lithiummetal batteries(SLMBs).Herein,we report achieving accelerated Li^(+)conduction in CSEs by a novel activation of the interfacial dipole layer.Polycationic ionic liquids and polyacrylonitrile with highly polar functional groups(-C≡N)are utilized to modulate the interfacial dipole layer in MOF-based CSEs,facilitating long-range pathways for the connectivity of Li^(+)conduction and enhancing rapid transport kinetics.The as-synthesized CSEs exhibit a high ionic conductivity of 0.59 mS cm^(-1)and a lithium transfer number of 0.85.The assembled SLMBs(Li/CSE/LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2))delivered a high-capacity retention of 88.7%with a minimal discharge voltage attenuation of 17.1 mV after 500 cycles(0.03 mV per cycle)at0.5 C.This work offers an effective approach to creating interpenetrating lithium-ion transport pathways with rapid ion transport kinetics for solid-state electrolytes,thereby advancing the development of solidstate lithium metal batteries.
基金supported by the National Natural Science Foundation(51772115)the National Key Research and Development Program of China(2018YFE0206900)the Hubei Provincial Natural Science Foundation(2019CFA002)。
文摘Aqueous zinc ion batteries(ZIBs)show great potential in large-scale energy storage systems for their advantages of high safety,low cost,high capacity,and environmental friendliness.However,the poor performance of Zn metal anode seriously hinders the application of ZIBs.Herein,we use the zinc-ion intercalatable V_(2)O_(5)nH_(2)O(VO)as the interface modification material,for the first time,to on-site build a Zn^(2+)-conductive ZnxV_(2)O_(5)nH_(2)O(ZnVO)interfacial layer via the spontaneous short-circuit reaction between the pre-fabricated VO film and Zn metal foil.Compared with the bare Zn,the ZnVO-coated Zn anode exhibits better electrochemical performances with dendrite-free Zn deposits,lower polarization,higher coulombic efficiency over 99%after long cycles and 10 times higher cycle life,which is confirmed by constructing Zn symmetrical cell and Zn|ZnSO_(4)+Li_(2)SO_(4)|LiFePO_(4) full cell.
基金supported by the National Natural Science Foundation of China(Grant No.82202690)the Shanghai Pujiang Program(2022PJD051)+1 种基金the China Postdoctoral Science Foundation(2022M712121)the Basic Science Program of Shanghai Sixth People’s Hospital(Grant No.ynqn202203).
文摘The integrative regeneration of both articular cartilage and subchondral bone remains an unmet clinical need due to the difficulties of mimicking spatial complexity in native osteochondral tissues for artificial implants.Layer-by-layer fabrication strategies,such as 3D printing,have emerged as a promising technology replicating the stratified zonal architecture and varying microstructures and mechanical properties.However,the dynamic and circulating physiological environments,such as mass transportation or cell migration,usually distort the pre-confined biological properties in the layered implants,leading to undistinguished spatial variations and subsequently inefficient regenerations.This study introduced a biomimetic calcified interfacial layer into the scaffold as a compact barrier between a cartilage layer and a subchondral bone layer to facilitate osteogenic-chondrogenic repair.The calcified interfacial layer consisting of compact polycaprolactone(PCL),nano-hydroxyapatite,and tasquinimod(TA)can physically and biologically separate the cartilage layer(TA-mixed,chondrocytes-load gelatin methacrylate)from the subchondral bond layer(porous PCL).This introduction preserved the as-designed independent biological environment in each layer for both cartilage and bone regeneration,successfully inhibiting vascular invasion into the cartilage layer and preventing hyaluronic cartilage calcification owing to devascularization of TA.The improved integrative regeneration of cartilage and subchondral bone was validated through gross examination,micro-computed tomography(micro-CT),and histological and immunohistochemical analyses based on an in vivo rat model.Moreover,gene and protein expression studies identified a key role of Caveolin(CAV-1)in promoting angiogenesis through the Wnt/β-catenin pathway and indicated that TA in the calcified layer blocked angiogenesis by inhibiting CAV-1.
基金the National Natural Science Foundation of China(Grant No.61674109)Jiangsu Province College Student Innovation and Entrepreneurship TrainingProgram(No.202010285087Y)the Natural Science Foundation of theJiangsu Higher Education Institutions of China(No.19KJD510006).
文摘A light-emitting organic solar cell(LE-OSC)with electroluminescence(EL)and photovoltaic(PV)properties is successfully fabricated by connecting the EL and PV units using a MoO_(3):Al co-evaporation interfacial layer,which has suitable work function and good transmittance.PV and EL units are fabricated based on poly(3-hexylthiophene)(P3HT)-indene-C60 bisadduct(IC60BA)blends,and 4,4′-bis(N-carbazolyl)biphenyl-factris(2-phenylpyridine)iridium(Ir(ppy)3),respectively.The work function and the transmittance of the MoO_(3):Al co-evaporation are measured and adjusted by the ultraviolet photoelectron spectroscopy and the optical spectrophotometer to obtain the better bi-functional device performance.The forward-and reverse-biased current density-voltage characteristics in dark and under illumination are evaluated to better understand the operational mechanism of the LE-OSCs.A maximum luminance of 1550 cd/m^(2)under forward bias and a power conversion efficiency of 0.24%under illumination(100 mW/cm^(2))are achieved in optimized LE-OSCs.The proposed device structure is expected to provide valuable information in the film conditions for understanding the polymer blends internal conditions and meliorating the film qualities.
基金the support from the National Natural Science Foundation of China (U20A20277, 52011530180, 52050410341, 51861130361, and 51861145312)Newton Advanced Fellowship by Royal Society (RP12G0414)+5 种基金Royal Academy of Engineering (TSPC-1070)Research Fund for Central Universities (N2025025)Xing Liao Talents Program (XLYC1807024 and XLYC1802024)Project funded by China Postdoctoral Science Foundation (2020TQ0060 and 2020M680965)NEU Innovation Team Project, Regional Innovation Joint Fund of Liaoning Province (2020-YKLH-39)Global Talents Recruitment Program endowed by the Chinese Government for their financial support。
文摘In the present investigation,the growth kinetics of interfacial reaction layer products between cubic boron nitride(CBN) and Cu-Sn-Ti filler metal has been thoroughly investigated.Detailed morphological and compositional features of respective compounds have been demonstrated for a wide brazing temperature ranging from 1153 K to 1223 K.It is found that within 30 minutes brazing holding time,the reaction layer growth is largely determined by the population of Ti N via effective Ti diffusion with an activation energy of 223.51 k J/mol,leading to parabolic growth patterns.It is further revealed that TiN grows both in axial and length dimensions,which eventually extends to the forefront and covers the reaction layer.
基金Funded by the National Natural Science Foundation of China (No. 61704113)the Higher Vocational Brand Mayer in Guangdong Province (No.610103)the Educational Science Planning Project of Guangdong Province (Higher Education Special)。
文摘The Ge metal-oxide-semiconductor (MOS) capacitors were fabricated with HfO2 as gate dielectric.AlON,NdON,and NdAlON were deposited between the gate dielectric and the Ge substrate as the interfacial passivation layer (IPL).The electrical properties (such as capacitance-voltage (C-V) and gate leakage current density versus gate voltage (J_(g)-V_(g))) were measured by HP4284A precision LCR meter and HP4156A semiconductor parameter analyzer.The chemical states and interfacial quality of the high-k/Ge interface were investigated by X-ray photoelectron spectroscopy (XPS).The experimental results show that the sample with the NdAlON as IPL exhibits the excellent interfacial and electrical properties.These should be attributed to an effective suppression of the Ge suboxide and HfGeOx interlayer,and an enhanced blocking role against inter-diffusion of the elements during annealing by the NdAlON IPL.
