Pyridine(Py) and 3-methylpyridine(3-MP) are crucial intermediates in chemical industrial processes.Here,we provide a simple and energy-efficient approach for the isolation of Py and 3-MP by employing crystalline cucur...Pyridine(Py) and 3-methylpyridine(3-MP) are crucial intermediates in chemical industrial processes.Here,we provide a simple and energy-efficient approach for the isolation of Py and 3-MP by employing crystalline cucurbit[6]uril(Q[6]).The crystal exhibit high selectivity for Py from the mixture of Py and 3-MP in both vapor and liquid phases,with separation purities close to 100%.The selectivity is attributed to the varying stability of the host-vip complexes after the absorption of Py or 3-MP,as revealed by the single-crystal structure analysis.ITC experimental results and DFT calculations indicate that,compared to3-MP,Q[6] has a higher binding strength and lower binding energy with Py.In addition,pyridine can be removed from the Q[6] cavity through vacuum heating or organic solvent immersion,enabling Q[6]reuse via reversible vip loading.This method offers a promising approach for high-purity Py and 3-MP separation with significant economic and environmental benefits.展开更多
The power conversion efficiency(PCE)for single-junction organic solar cells(OSCs),wherein the photoactive layer is a typical bulk-heterojunction containing donor and acceptor materials,has surpassed 19%[1−4].The advan...The power conversion efficiency(PCE)for single-junction organic solar cells(OSCs),wherein the photoactive layer is a typical bulk-heterojunction containing donor and acceptor materials,has surpassed 19%[1−4].The advance is ascribed to the development of Y-series non-fullerene acceptors(NFAs)[5,6]and polymer donors[7−13],and the refined control of the blend film morphology.展开更多
Three small-molecule donors based on dithieno [2,3-d:2’,3 ’-d’]-benzo[1,2-b:4,5-b’] dithiophene(DTBDT)unit were designed and synthesized by side chain regulation with chlorinated or/and sulfurated substitutions(na...Three small-molecule donors based on dithieno [2,3-d:2’,3 ’-d’]-benzo[1,2-b:4,5-b’] dithiophene(DTBDT)unit were designed and synthesized by side chain regulation with chlorinated or/and sulfurated substitutions(namely ZR1,ZR1-Cl,and ZR1-S-Cl respectively),along with a crystalline non-fullerene acceptor IDIC-4 Cl with a chlorinated 1,1-dicyanomethylene-3-indanone(IC) end group.Energy levels,molar extinction coefficients and crystallinities of three donor molecules can be effectively altered by combining chlorination and sulfuration strategies.Especially,the ZR1-S-Cl exhibited the best absorption ability,lowest higher occupied molecular orbital(HOMO) energy level and highest crystallinity among three donors,resulting in the corresponding all-small-molecule organic solar cells to produce a high power conversion efficiency(PCE) of 12.05% with IDIC-4 Cl as an acceptor.展开更多
Indacenodithiophene(IDT)derivatives are kinds of the most representative and widely used cores of small molecule acceptors(SMAs)in organic solar cells(OSCs).Here we systematically investigate the influence of end-grou...Indacenodithiophene(IDT)derivatives are kinds of the most representative and widely used cores of small molecule acceptors(SMAs)in organic solar cells(OSCs).Here we systematically investigate the influence of end-group fluo rination density and position on the photovoltaic properties of the IDT-based SMAs IDIC-nF(n=0,2,4).The absorption edge of IDIC-nF red-shifts with theπ-πstacking and crystallinity improvement,and their electronic energy levels downshift with increasing n.Due to the advantages of J_(sc)and FF as well as acceptable V_(oc),the difluorinated IDIC-2 F acceptor based OSCs achieve the highest power conversion efficiency(PCE)of 13%,better than the OSC devices based on IDIC and IDIC-4 F as acceptors.And the photovoltaic performance of the PTQ10:IDIC-2 F OSCs is insensitive to the active layer thickness:PCE still keep high values of 12.00%and 11.46%for the devices with active layer thickness of 80 and 354 nm,respectively.This work verifies that fine and delicate modulation of the SMAs molecular structure could optimize photovoltaic performance of the corresponding OSCs.Meanwhile,the thickness-insensitivity property of the OSCs has potential for large-scale and printable fabrication technology.展开更多
Recently,all-polymer solar cells(all-PSCs)have become an important organic photovoltaic technology,ascribing to their unique characteristics of high stability and mechanical endurance.However,the morphology control be...Recently,all-polymer solar cells(all-PSCs)have become an important organic photovoltaic technology,ascribing to their unique characteristics of high stability and mechanical endurance.However,the morphology control between polymer donor and polymer acceptor suffers from tough difficulties,resulting from the nature of rigid planarity and chain entanglement in the conjugated polymer backbones.In this work,we utilize an additive,1-chloro-naphthalene(CN),to regulate polymer chain stacking and orientation in D18:PY-IT system,resulting in the formation of versatile nano-scale polymer fibrillization between donor and acceptor phases.Consequently,the CN-modified D18:PY-IT blend film shows improved molecular stacking characteristics and distinct nano-scale bi-continuous phase separation.Attributing to the incorporation of CN additive in a bulk-heterojunction(BHJ)D18:PY-IT system,it exhibits higher photovoltaic performance than the as-cast and only thermal annealing(TA)treated devices,where the CN-based device provides a power conversion efficiency(PCE)of 17.31%,an open-circuit voltage(VOC)of 0.955 V,a short-circuit current density(JSC)of 24.16 mA·cm^(-2),and a fill factor(FF)of 74.99%,respectively.This is one of the highest photovoltaic performances reported in the D18:PY-IT based binary BHJ all-PSCs.Hence,it is evident that the morphology in all-PSCs can be feasibly modulated via incorporating appropriate additive into active layer for achieving excellent photovoltaic performance.展开更多
Organic solar cells(OSCs)have attracted much interest in the past few decades because of their advantages,such as being lightweight,low cost,simple preparation process,and environmental friendliness.While researchers ...Organic solar cells(OSCs)have attracted much interest in the past few decades because of their advantages,such as being lightweight,low cost,simple preparation process,and environmental friendliness.While researchers have made significant progress on the active layer materials of OSCs,the interface engineering is another entry point for upgrading the photovoltaic performance of OSCs.Significantly,the interface modification materials,including anode interfacial materials and cathode interfacial materials,are two essential parts of interfacial layers for OSCs,in which the excellent interfacial materials can realize the very high-performance photovoltaic cells.Among these interfacial materials,the anode interfacial layers(AILs)play a crucial role in improving photovoltaic performance.This review expresses a detailed conclusion of the development of anode interfacial materials and an outlook on future trends for OSCs.展开更多
Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the sta...Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the state-of-the-art organic solar cells.The recent rapid progress in organic solar cells relies on the continuously emerging new materials and device fabrication technologies,and the deep understanding on film morphology,molecular packing and device physics.Donor and acceptor materials are the key materials for organic solar cells since they determine the device performance.The past 25 years have witnessed an odyssey in developing high-performance donors and acceptors.In this review,we focus on those star materials and milestone work,and introduce the molecular structure evolution of key materials.These key materials include homopolymer donors,D-A copolymer donors,A-D-A small molecular donors,fullerene acceptors and nonfullerene acceptors.At last,we outlook the challenges and very important directions in key materials development.展开更多
Graphene dispersions in low-boiling-point green solvents have wide applications in coatings,conducting inks,batteries,electronics and solar cells.Two three-dimensional(3D)cathode interfacial materials(CIMs)(1,3,5,7,9,...Graphene dispersions in low-boiling-point green solvents have wide applications in coatings,conducting inks,batteries,electronics and solar cells.Two three-dimensional(3D)cathode interfacial materials(CIMs)(1,3,5,7,9,11,13,15-octa-(9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-vinylpentacyclo-octasiloxane)(POSSFN)and(1,3,5,7-tetra-(9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-adamantane)(ADMAFN)are excellent surfactants for dispersing graphene in ethanol at the concentration of 0.97–1.18 mg mL−1,in agreement with their calculated large adsorption energies on graphene.The results of electron spin resonance,Raman,scanning Kelvin probe microscopy and X-ray photoelectron spectroscopy measurements indicate that the amino groups could n-dope graphene or form dipole interaction with graphene.The two 3D-surfactant-based graphene composites(POSSFN-G and ADMAFN-G)can work as high-performance CIMs in organic solar cells(OSCs),which improve the power conversion efficiency(PCE)of the OSCs based on PM6:Y6 to 15.9%–16.1%.ADMAFN forms dipole interaction with graphene in ADMAFN-G and the composite CIM delivers high PCE of 16.11%in the OSCs,while POSSFN forms n-doped composition with graphene in POSSFN-G which works well as thicker CIM film in the OSCs.展开更多
Water/alcohol soluble cathode interfacial materials(CIMs)are playing important roles in optoelectronic devices such as organic light emitting diodes,perovskite solar cells and organic solar cells(OSCs).Herein,n-doped ...Water/alcohol soluble cathode interfacial materials(CIMs)are playing important roles in optoelectronic devices such as organic light emitting diodes,perovskite solar cells and organic solar cells(OSCs).Herein,n-doped solution-processable single-wall carbon nanotubes(SWCNTs)-containing CIMs for OSCs are developed by dispersing SWCNTs to the typical CIMs perylene diimide(PDI)derivatives PDIN and PDINO.The Raman and X-ray photoelectron spectroscopy(XPS)measurement results illustrate the ndoped behavior of SWCNTs by PDIN/PDINO in the blend CIMs.The blended and n-doped SWCNTs can tune the work function and enhance the conductivity of the PDI-derivative/SWCNT(PDI-CNT)composite CIMs,and the composite CIMs can regulate and down-shift the work function of cathode,reduce the charge recombination,improve the charge extraction rate and enhance photovoltaic performance of the OSCs.High power conversion efficiency(PCE)of 17.1%and 17.7%are obtained for the OSCs based on PM6:Y6 and ternary PM6:Y6:PC_(71) BM respectively with the PDI-CNTcomposites CIMs.These results indicate that the ndoped SWCNT-containing composites,like other n-doped nanomaterials such as zero dimensional fullerenes and two dimensional graphenes,are excellent CIMs for OSCs and could find potential applications in other optoelectronic devices.展开更多
基金supported by the Guizhou Provincial Basic Research Program(Natural Science) Youth Guidance(Nos.[2024]110,[2024]378)Science and Technology Innovation Team of Natural Science Foundation of Guizhou Province(No.CXTD[2023]005)+3 种基金Science and Technology Innovation Team of Higher Education Department of Guizhou Province(No.QJJ[2023]053)Natural Science Special of Guizhou University(No.202137)Guizhou Provincial Key Laboratory Platform Project(No.ZSYS[2025]008)PhD Foundation of Guizhou University(No.[2021]83)。
文摘Pyridine(Py) and 3-methylpyridine(3-MP) are crucial intermediates in chemical industrial processes.Here,we provide a simple and energy-efficient approach for the isolation of Py and 3-MP by employing crystalline cucurbit[6]uril(Q[6]).The crystal exhibit high selectivity for Py from the mixture of Py and 3-MP in both vapor and liquid phases,with separation purities close to 100%.The selectivity is attributed to the varying stability of the host-vip complexes after the absorption of Py or 3-MP,as revealed by the single-crystal structure analysis.ITC experimental results and DFT calculations indicate that,compared to3-MP,Q[6] has a higher binding strength and lower binding energy with Py.In addition,pyridine can be removed from the Q[6] cavity through vacuum heating or organic solvent immersion,enabling Q[6]reuse via reversible vip loading.This method offers a promising approach for high-purity Py and 3-MP separation with significant economic and environmental benefits.
基金supported by the National Natural Science Foundation of China (52373175)High-level Innovative Talents Foundation of Guizhou Province (QKHPTRCGCC[2023]024)+3 种基金Science and Technology Innovation Team of Higher Education Department of Guizhou Province(QJJ[2023]053)Natural Science Foundation of Guizhou University (GZUTGH[2023]12, GZUTGH[2023]71)National Key Research and Development Program of China(2022YFB3803300, 2023YFE0116800)Beijing Natural Science Foundation (IS23037)
文摘The power conversion efficiency(PCE)for single-junction organic solar cells(OSCs),wherein the photoactive layer is a typical bulk-heterojunction containing donor and acceptor materials,has surpassed 19%[1−4].The advance is ascribed to the development of Y-series non-fullerene acceptors(NFAs)[5,6]and polymer donors[7−13],and the refined control of the blend film morphology.
基金the financial support from the National Natural Science Foundation of China (Grant Nos. 21822503, 51973043, 21534003, 21721002, 51863002 and 51973042)the Ministry of Science and Technology of China (Grant No. 2016YFA0200700)+2 种基金Youth Innovation Promotion AssociationK. C. Wong Education Foundationthe Chinese Academy of Sciences。
文摘Three small-molecule donors based on dithieno [2,3-d:2’,3 ’-d’]-benzo[1,2-b:4,5-b’] dithiophene(DTBDT)unit were designed and synthesized by side chain regulation with chlorinated or/and sulfurated substitutions(namely ZR1,ZR1-Cl,and ZR1-S-Cl respectively),along with a crystalline non-fullerene acceptor IDIC-4 Cl with a chlorinated 1,1-dicyanomethylene-3-indanone(IC) end group.Energy levels,molar extinction coefficients and crystallinities of three donor molecules can be effectively altered by combining chlorination and sulfuration strategies.Especially,the ZR1-S-Cl exhibited the best absorption ability,lowest higher occupied molecular orbital(HOMO) energy level and highest crystallinity among three donors,resulting in the corresponding all-small-molecule organic solar cells to produce a high power conversion efficiency(PCE) of 12.05% with IDIC-4 Cl as an acceptor.
基金supported by the Natural Science Foundation of China(Nos.51820105003,51863002 and 51973042)Excellent young scientific and technological talents of Guizhou,China(No.QKHPTRC[2019]5652)。
文摘Indacenodithiophene(IDT)derivatives are kinds of the most representative and widely used cores of small molecule acceptors(SMAs)in organic solar cells(OSCs).Here we systematically investigate the influence of end-group fluo rination density and position on the photovoltaic properties of the IDT-based SMAs IDIC-nF(n=0,2,4).The absorption edge of IDIC-nF red-shifts with theπ-πstacking and crystallinity improvement,and their electronic energy levels downshift with increasing n.Due to the advantages of J_(sc)and FF as well as acceptable V_(oc),the difluorinated IDIC-2 F acceptor based OSCs achieve the highest power conversion efficiency(PCE)of 13%,better than the OSC devices based on IDIC and IDIC-4 F as acceptors.And the photovoltaic performance of the PTQ10:IDIC-2 F OSCs is insensitive to the active layer thickness:PCE still keep high values of 12.00%and 11.46%for the devices with active layer thickness of 80 and 354 nm,respectively.This work verifies that fine and delicate modulation of the SMAs molecular structure could optimize photovoltaic performance of the corresponding OSCs.Meanwhile,the thickness-insensitivity property of the OSCs has potential for large-scale and printable fabrication technology.
基金supported by the National Natural Science Foundation of China(No.52373175)Guizhou Provincial Basic Research Program(General Program)(No.zk[2025]603)+6 种基金the Highlevel Innovative Talents Foundation of Guizhou Province(No.QKHPTRC-GCC[2023]024)Natural Science Foundation of Guizhou Province(No.QKHPTRC-CXTD[2023]005)Science and Technology Innovation Team of Higher Education Department of Guizhou Province(No.QJJ[2023]053)Natural Science Foundation of Guizhou University(No.GZUTGH[2023]12)Science and Technology Innovation Team of Guizhou University(No.GZUKCT[2023]01)the National Key Research and Development Program of China(Nos.2022YFB3803300 and 2023YFE0116800)Beijing Natural Science Foundation(No.IS23037).
文摘Recently,all-polymer solar cells(all-PSCs)have become an important organic photovoltaic technology,ascribing to their unique characteristics of high stability and mechanical endurance.However,the morphology control between polymer donor and polymer acceptor suffers from tough difficulties,resulting from the nature of rigid planarity and chain entanglement in the conjugated polymer backbones.In this work,we utilize an additive,1-chloro-naphthalene(CN),to regulate polymer chain stacking and orientation in D18:PY-IT system,resulting in the formation of versatile nano-scale polymer fibrillization between donor and acceptor phases.Consequently,the CN-modified D18:PY-IT blend film shows improved molecular stacking characteristics and distinct nano-scale bi-continuous phase separation.Attributing to the incorporation of CN additive in a bulk-heterojunction(BHJ)D18:PY-IT system,it exhibits higher photovoltaic performance than the as-cast and only thermal annealing(TA)treated devices,where the CN-based device provides a power conversion efficiency(PCE)of 17.31%,an open-circuit voltage(VOC)of 0.955 V,a short-circuit current density(JSC)of 24.16 mA·cm^(-2),and a fill factor(FF)of 74.99%,respectively.This is one of the highest photovoltaic performances reported in the D18:PY-IT based binary BHJ all-PSCs.Hence,it is evident that the morphology in all-PSCs can be feasibly modulated via incorporating appropriate additive into active layer for achieving excellent photovoltaic performance.
基金National Natural Science Foundation of China,Grant/Award Number:52373175High-level Innovative Talents Foundation of Guizhou Province,Grant/Award Number:QKHPTRC-GCC[2023]024+3 种基金Science and Technology Innovation Team of Higher Education Department of Guizhou Province,Grant/Award Number:QJJ[2023]053Natural Science Foundation of Guizhou University,Grant/Award Number:GZUTGH[2023]12National Key Research and Development Program of China,Grant/Award Numbers:2022YFB3803300,2023YFE0116800Strategic Priority Research Program of Chinese Academy of Sciences,Grant/Award Number:XDB36000000。
文摘Organic solar cells(OSCs)have attracted much interest in the past few decades because of their advantages,such as being lightweight,low cost,simple preparation process,and environmental friendliness.While researchers have made significant progress on the active layer materials of OSCs,the interface engineering is another entry point for upgrading the photovoltaic performance of OSCs.Significantly,the interface modification materials,including anode interfacial materials and cathode interfacial materials,are two essential parts of interfacial layers for OSCs,in which the excellent interfacial materials can realize the very high-performance photovoltaic cells.Among these interfacial materials,the anode interfacial layers(AILs)play a crucial role in improving photovoltaic performance.This review expresses a detailed conclusion of the development of anode interfacial materials and an outlook on future trends for OSCs.
基金supported by the National Natural Science Foundation of China(51773045,21772030,51922032,21961160720)。
文摘Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the state-of-the-art organic solar cells.The recent rapid progress in organic solar cells relies on the continuously emerging new materials and device fabrication technologies,and the deep understanding on film morphology,molecular packing and device physics.Donor and acceptor materials are the key materials for organic solar cells since they determine the device performance.The past 25 years have witnessed an odyssey in developing high-performance donors and acceptors.In this review,we focus on those star materials and milestone work,and introduce the molecular structure evolution of key materials.These key materials include homopolymer donors,D-A copolymer donors,A-D-A small molecular donors,fullerene acceptors and nonfullerene acceptors.At last,we outlook the challenges and very important directions in key materials development.
基金the National Natural Science Foundation of China(51820105003,51863002 and 51973042)the Excellent Young Scientific and Technological Talents of Guizhou,China(QKHPTRC[2019]5652)。
文摘Graphene dispersions in low-boiling-point green solvents have wide applications in coatings,conducting inks,batteries,electronics and solar cells.Two three-dimensional(3D)cathode interfacial materials(CIMs)(1,3,5,7,9,11,13,15-octa-(9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-vinylpentacyclo-octasiloxane)(POSSFN)and(1,3,5,7-tetra-(9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-adamantane)(ADMAFN)are excellent surfactants for dispersing graphene in ethanol at the concentration of 0.97–1.18 mg mL−1,in agreement with their calculated large adsorption energies on graphene.The results of electron spin resonance,Raman,scanning Kelvin probe microscopy and X-ray photoelectron spectroscopy measurements indicate that the amino groups could n-dope graphene or form dipole interaction with graphene.The two 3D-surfactant-based graphene composites(POSSFN-G and ADMAFN-G)can work as high-performance CIMs in organic solar cells(OSCs),which improve the power conversion efficiency(PCE)of the OSCs based on PM6:Y6 to 15.9%–16.1%.ADMAFN forms dipole interaction with graphene in ADMAFN-G and the composite CIM delivers high PCE of 16.11%in the OSCs,while POSSFN forms n-doped composition with graphene in POSSFN-G which works well as thicker CIM film in the OSCs.
基金supported by the National Natural Science Foundation of China(91633301,51863002,51973042)the Excellent Young Scientific and Technological Talents of Guizhou,China(QKHPTRC[2019]5652)the Cultivation and Innovation of New Academic Talents of Guizhou Institute of Technology(GZLGXM-05)。
文摘Water/alcohol soluble cathode interfacial materials(CIMs)are playing important roles in optoelectronic devices such as organic light emitting diodes,perovskite solar cells and organic solar cells(OSCs).Herein,n-doped solution-processable single-wall carbon nanotubes(SWCNTs)-containing CIMs for OSCs are developed by dispersing SWCNTs to the typical CIMs perylene diimide(PDI)derivatives PDIN and PDINO.The Raman and X-ray photoelectron spectroscopy(XPS)measurement results illustrate the ndoped behavior of SWCNTs by PDIN/PDINO in the blend CIMs.The blended and n-doped SWCNTs can tune the work function and enhance the conductivity of the PDI-derivative/SWCNT(PDI-CNT)composite CIMs,and the composite CIMs can regulate and down-shift the work function of cathode,reduce the charge recombination,improve the charge extraction rate and enhance photovoltaic performance of the OSCs.High power conversion efficiency(PCE)of 17.1%and 17.7%are obtained for the OSCs based on PM6:Y6 and ternary PM6:Y6:PC_(71) BM respectively with the PDI-CNTcomposites CIMs.These results indicate that the ndoped SWCNT-containing composites,like other n-doped nanomaterials such as zero dimensional fullerenes and two dimensional graphenes,are excellent CIMs for OSCs and could find potential applications in other optoelectronic devices.
