Low-dimensional(LD)halide perovskites have attracted considerable attention due to their distinctive structures and exceptional optoelectronic properties,including high absorption coefficients,extended charge carrier ...Low-dimensional(LD)halide perovskites have attracted considerable attention due to their distinctive structures and exceptional optoelectronic properties,including high absorption coefficients,extended charge carrier diffusion lengths,suppressed non-radiative recombination rates,and intense photoluminescence.A key advantage of LD perovskites is the tunability of their optical and electronic properties through the precise optimization of their structural arrangements and dimensionality.This review systematically examines recent progress in the synthesis and optoelectronic characterizations of LD perovskites,focusing on their structural,optical,and photophysical properties that underpin their versatility in diverse applications.The review further summarizes advancements in LD perovskite-based devices,including resistive memory,artificial synapses,photodetectors,light-emitting diodes,and solar cells.Finally,the challenges associated with stability,scalability,and integration,as well as future prospects,are discussed,emphasizing the potential of LD perovskites to drive breakthroughs in device efficiency and industrial applicability.展开更多
Textiles for health and sporting activity monitoring are on the rise with the advent of smart portable wearables.The intention of this work is to design wireless monitoring wearables,based on widely available textiles...Textiles for health and sporting activity monitoring are on the rise with the advent of smart portable wearables.The intention of this work is to design wireless monitoring wearables,based on widely available textiles and low environmental impact production technologies.Herein we have developed a polymeric ink which is able to functionalize different types of textile fibers(including silver conducting fibers,cotton,and commercial textile)with poly pyrrole.These fibers were weaved together with a thinner silver conducting fiber and carbon fiber to form a touch-sensitive energy harvesting system that would generate an electric output when mechanical pressure is applied to it.Different prototypes were manufactured with loom weaving accessories to simulate real textile cloths.By simple touch,the prototypes produced a maximum voltage of 244 V and a maximum power density of 2.29 W m^(-2).The current generated is then transformed into a digital signal,which is further utilized for human motion or gesture monitorization.The system comprises a wireless block for the Internet of Things(IoT)applicability that will be eventually extended to future remote health and sports monitoring systems.展开更多
The homojunction based on Ti_(3)C_(2)T_(x) MXene-doped In_(2)O_(3) and indium oxide as the channel layer is real-ized in high-performance metal oxide thin film transistors(TFTs).Doping of MXene into In_(2)O_(3) result...The homojunction based on Ti_(3)C_(2)T_(x) MXene-doped In_(2)O_(3) and indium oxide as the channel layer is real-ized in high-performance metal oxide thin film transistors(TFTs).Doping of MXene into In_(2)O_(3) results in n-type semiconductor behavior,realizing tunable work function of In_(2)O_(3) from 5.11 to 4.79 eV as MXene content increases from 0 to 2 wt.%.MXene-doped In_(2)O_(3)-based homojunction TFT presents optimal per-formance with electron mobilities of greater than 27.10 cm^(2)/(V s)at 240°C,far exceeding the maximum mobility of 3.91 cm^(2)/(V s)for single-layer In_(2)O_(3)TFTs.The improved performance originates from boosting of a two-dimensional electron gas(2DEG)formed at carefully engineered In_(2)O_(3)/MXene-doped In_(2)O_(3)ox-ide homojunction interface.Besides,the transformation in conduction mechanism leads to better stability of MXene-doped In_(2)O_(3) homojunction devices compared to undoped bilayer In_(2)O_(3).Low-frequency noise further illustrates that doping MXene into In_(2)O_(3) helps to reduce the device trap density,demonstrating excellent electrical performance.A resistor-loaded unipolar inverter based on In_(2)O_(3)/0.5%MXene-In_(2)O_(3)TFT has demonstrated full swing characteristics and a high gain of 13.The effective doping of MXene into constructed homojunction TFTs not only contributes to improved stability,but also provides an ef-fective strategy for designing novel homojunction TFTs for low-cost oxide-based electronics.展开更多
Advanced light management techniques can enhance the sunlight absorption of perovskite solar cells(PSCs).When located at the front,they may act as a UV barrier,which is paramount for protecting the perovskite layer ag...Advanced light management techniques can enhance the sunlight absorption of perovskite solar cells(PSCs).When located at the front,they may act as a UV barrier,which is paramount for protecting the perovskite layer against UVenabled degradation.Although it was recently shown that photonic structures such as Escher-like patterns could approach the theoretical Lambertian-limit of light trapping,it remains challenging to also implement UV protection properties for these diffractive structures while maintaining broadband absorption gains.Here,we propose a checkerboard(CB)tile pattern with designated UV photon conversion capability.Through a combined optical and electrical modeling approach,this photonic structure can increase photocurrent and power conversion efficiency in ultrathin PSCs by 25.9%and 28.2%,respectively.We further introduce a luminescent down-shifting encapsulant that converts the UV irradiation into Visible photons matching the solar cell absorption spectrum.To this end,experimentally obtained absorption and emission profiles of state-of-the-art down-shifting materials(i.e.,lanthanidebased organic-inorganic hybrids)are used to predict potential gains from harnessing the UV energy.We demonstrate that at least 94%of the impinging UV radiation can be effectively converted into the Visible spectral range.Photonic protection from high-energy photons contributes to the market deployment of perovskite solar cell technology,and may become crucial for Space applications under AM0 illumination.By combining light trapping with luminescent downshifting layers,this work unravels a potential photonic solution to overcome UV degradation in PSCs while circumventing optical losses in ultrathin cells,thus improving both performance and stability.展开更多
基金funding from FCT(Fundagao para a Ciencia e Tecnologia,I.P.)under the projects LA/P/0037/2020,UIDP/50025/2020 and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures,Nanomodelling and Nanofabrication-i3Nby the projects FlexSolar(PTDC/CTM-REF/1008/2020),and SpaceFlex(2022.01610.PTDC,DOI:10.54499/2022.01610.PTDC)+1 种基金supported by the project M-ECO2-Industrial Cluster for advanced biofuel production,Ref.C644930471-00000041,R2U Technologies and Befunding from the European Union via the project X-STREAM(Horizon EU,ERC CoG,No 101124803)the support of a fellowship from the"la Caixa"Foundation(ID 100010434)。
文摘Low-dimensional(LD)halide perovskites have attracted considerable attention due to their distinctive structures and exceptional optoelectronic properties,including high absorption coefficients,extended charge carrier diffusion lengths,suppressed non-radiative recombination rates,and intense photoluminescence.A key advantage of LD perovskites is the tunability of their optical and electronic properties through the precise optimization of their structural arrangements and dimensionality.This review systematically examines recent progress in the synthesis and optoelectronic characterizations of LD perovskites,focusing on their structural,optical,and photophysical properties that underpin their versatility in diverse applications.The review further summarizes advancements in LD perovskite-based devices,including resistive memory,artificial synapses,photodetectors,light-emitting diodes,and solar cells.Finally,the challenges associated with stability,scalability,and integration,as well as future prospects,are discussed,emphasizing the potential of LD perovskites to drive breakthroughs in device efficiency and industrial applicability.
基金the project BRIGHT(Project reference:MERA-NET3/0004/2021)financed by national funds from FCT-Fundacao para a Ciência e a Tecnologia,I.P.,in the scope of the projects LA/P/0037/2020,UIDP/50025/2020 and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures,Nanomodelling and Nanofabrication-i3N+6 种基金the support from the i3N-FCT-Portuguese Foundation for Science and Technology through the Ph.D.(Scholarship grant no.UI/BD/151288/2021)also partially supported by European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreements number 952169(SYNERGY,H2020-WIDESPREAD-2020-5,CSA)and 101008701(EMERGE,H2020-INFRAIA-2020-1),and 101070255(REFORM,HORIZON-C L4-2021-DIGITAL-EMERGING-01)also supported by LISBOA-05-3559-FSE-000007CENTRO-04-3559FSE-000094 operationsco-funded by the Lisboa 2020,Centro 2020 programme,Portugal 2020,European Union,through the European Social FundFunda??o para a Ciência e Tecnologia(FCT)Agência Nacional de Inovacao(ANI)。
文摘Textiles for health and sporting activity monitoring are on the rise with the advent of smart portable wearables.The intention of this work is to design wireless monitoring wearables,based on widely available textiles and low environmental impact production technologies.Herein we have developed a polymeric ink which is able to functionalize different types of textile fibers(including silver conducting fibers,cotton,and commercial textile)with poly pyrrole.These fibers were weaved together with a thinner silver conducting fiber and carbon fiber to form a touch-sensitive energy harvesting system that would generate an electric output when mechanical pressure is applied to it.Different prototypes were manufactured with loom weaving accessories to simulate real textile cloths.By simple touch,the prototypes produced a maximum voltage of 244 V and a maximum power density of 2.29 W m^(-2).The current generated is then transformed into a digital signal,which is further utilized for human motion or gesture monitorization.The system comprises a wireless block for the Internet of Things(IoT)applicability that will be eventually extended to future remote health and sports monitoring systems.
基金the National Natural Science Foundation of China(No.11774001)the Anhui Project(No.Z010118169).
文摘The homojunction based on Ti_(3)C_(2)T_(x) MXene-doped In_(2)O_(3) and indium oxide as the channel layer is real-ized in high-performance metal oxide thin film transistors(TFTs).Doping of MXene into In_(2)O_(3) results in n-type semiconductor behavior,realizing tunable work function of In_(2)O_(3) from 5.11 to 4.79 eV as MXene content increases from 0 to 2 wt.%.MXene-doped In_(2)O_(3)-based homojunction TFT presents optimal per-formance with electron mobilities of greater than 27.10 cm^(2)/(V s)at 240°C,far exceeding the maximum mobility of 3.91 cm^(2)/(V s)for single-layer In_(2)O_(3)TFTs.The improved performance originates from boosting of a two-dimensional electron gas(2DEG)formed at carefully engineered In_(2)O_(3)/MXene-doped In_(2)O_(3)ox-ide homojunction interface.Besides,the transformation in conduction mechanism leads to better stability of MXene-doped In_(2)O_(3) homojunction devices compared to undoped bilayer In_(2)O_(3).Low-frequency noise further illustrates that doping MXene into In_(2)O_(3) helps to reduce the device trap density,demonstrating excellent electrical performance.A resistor-loaded unipolar inverter based on In_(2)O_(3)/0.5%MXene-In_(2)O_(3)TFT has demonstrated full swing characteristics and a high gain of 13.The effective doping of MXene into constructed homojunction TFTs not only contributes to improved stability,but also provides an ef-fective strategy for designing novel homojunction TFTs for low-cost oxide-based electronics.
基金financed by national funds from FCT(Fundação para a Ciência e Tecnologia,I.P.)in the scope of the projects LA/P/0037/2020,UIDP/50025/2020,and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures,Nanomodelling,and Nanofabrication-i3N,and the FCT,I.P.project SpaceFlex(2022.01610.PTDC)as well as by M-ECO2 project(Industrial cluster for advanced biofuel production,Ref.C644930471-00000041)cofinanced by PRR-Recovery and Resilience Plan of the European Union(Next Generation EU)+3 种基金This work was also developed within the scope of the projects:CICECO-Aveiro Institute of Materials,UIDB/50011/2020,UIDP/50011/2020,and LA/P/0006/2020 financed by national funds through the FCT,I.P.(PIDDAC)S.H.acknowledges the support from FCT,I.P.through the AdvaMTech Ph.D.program scholarship PD/BD/143031/2018S.H.and S.Y.acknowledge the support of the SRP-JRP project(non-EE046)M.A.also acknowledges the support from FCT,I.P.through the Ph.D.scholarship grant SFRH/BD/148078/2019.
文摘Advanced light management techniques can enhance the sunlight absorption of perovskite solar cells(PSCs).When located at the front,they may act as a UV barrier,which is paramount for protecting the perovskite layer against UVenabled degradation.Although it was recently shown that photonic structures such as Escher-like patterns could approach the theoretical Lambertian-limit of light trapping,it remains challenging to also implement UV protection properties for these diffractive structures while maintaining broadband absorption gains.Here,we propose a checkerboard(CB)tile pattern with designated UV photon conversion capability.Through a combined optical and electrical modeling approach,this photonic structure can increase photocurrent and power conversion efficiency in ultrathin PSCs by 25.9%and 28.2%,respectively.We further introduce a luminescent down-shifting encapsulant that converts the UV irradiation into Visible photons matching the solar cell absorption spectrum.To this end,experimentally obtained absorption and emission profiles of state-of-the-art down-shifting materials(i.e.,lanthanidebased organic-inorganic hybrids)are used to predict potential gains from harnessing the UV energy.We demonstrate that at least 94%of the impinging UV radiation can be effectively converted into the Visible spectral range.Photonic protection from high-energy photons contributes to the market deployment of perovskite solar cell technology,and may become crucial for Space applications under AM0 illumination.By combining light trapping with luminescent downshifting layers,this work unravels a potential photonic solution to overcome UV degradation in PSCs while circumventing optical losses in ultrathin cells,thus improving both performance and stability.
