A sensor,serving as a transducer,produces a quantifiable output in response to a predetermined input stimulus,which may be of a chemical or physical nature.The field of gas detection has experienced a substantial surg...A sensor,serving as a transducer,produces a quantifiable output in response to a predetermined input stimulus,which may be of a chemical or physical nature.The field of gas detection has experienced a substantial surge in research activity,attributable to the diverse functionalities and enhanced accessibility of advanced active materials.In this work,recent advances in gas sensors,specifically those utilizing Field Effect Transistors(FETs),are summarized,including device configurations,response characteristics,sensor materials,and application domains.In pursuing high-performance artificial olfactory systems,the evolution of FET gas sensors necessitates their synchronization with material advancements.These materials should have large surface areas to enhance gas adsorption,efficient conversion of gas input to detectable signals,and strong mechanical qualities.The exploration of gas-sensitive materials has covered diverse categories,such as organic semiconductor polymers,conductive organic compounds and polymers,metal oxides,metal-organic frameworks,and low-dimensional materials.The application of gas sensing technology holds significant promise in domains such as industrial safety,environmental monitoring,and medical diagnostics.This comprehensive review thoroughly examines recent progress,identifies prevailing technical challenges,and outlines prospects for gas detection technology utilizing field effect transistors.The primary aim is to provide a valuable reference for driving the development of the next generation of gas-sensitive monitoring and detection systems characterized by improved sensitivity,selectivity,and intelligence.展开更多
The strong electron-phonon coupling in organic photovoltaic materials significantly impedes exciton transport and promotes charge recombination,thereby exerting a detrimental effect on the overall performance of organ...The strong electron-phonon coupling in organic photovoltaic materials significantly impedes exciton transport and promotes charge recombination,thereby exerting a detrimental effect on the overall performance of organic solar cells(OSCs).Mitigating electron-phonon coupling is therefore essential for developing high-performance OSCs.In this work,we introduce two solid additives,1-bromo-3-chloronaphthalene(BCN-1)and 1-chloro-3-bromonaphthalene(BCN-2),into the bulk heterojunction active layer to address this fundamental challenge.We demonstrate that BCN-2 effectively suppresses high-frequency lattice vibrations,which minimizes electron-phonon scattering and thereby promotes efficient and long-range exciton diffusion.As a result,the BCN-2 processed devices exhibit prolonged exciton lifetime and superior charge carrier mobility compared to the control devices.These synergistic improvements in photophysical properties such as charge transport,contribute to a remarkable power conversion efficiency of 19.72%in the PM6:L8-BO-based OSCs.This work underscores the suppression of electron-phonon coupling as a critical and general strategy for advancing the performance of organic photovoltaic devices.展开更多
基金supported by the National Key R&D Program of China(No.2023YFC3707201)the National Natural Science Foundation of China(No.52320105003)+2 种基金the Informatization Plan of Chinese Academy of Sciences(No.CAS-WX2023PY-0103)the Fundamental Research Funds for the Central Universities(No.E3ET1803)sponsored by the Alliance of International Science Organizations(ANSO)scholarship for young talents.
文摘A sensor,serving as a transducer,produces a quantifiable output in response to a predetermined input stimulus,which may be of a chemical or physical nature.The field of gas detection has experienced a substantial surge in research activity,attributable to the diverse functionalities and enhanced accessibility of advanced active materials.In this work,recent advances in gas sensors,specifically those utilizing Field Effect Transistors(FETs),are summarized,including device configurations,response characteristics,sensor materials,and application domains.In pursuing high-performance artificial olfactory systems,the evolution of FET gas sensors necessitates their synchronization with material advancements.These materials should have large surface areas to enhance gas adsorption,efficient conversion of gas input to detectable signals,and strong mechanical qualities.The exploration of gas-sensitive materials has covered diverse categories,such as organic semiconductor polymers,conductive organic compounds and polymers,metal oxides,metal-organic frameworks,and low-dimensional materials.The application of gas sensing technology holds significant promise in domains such as industrial safety,environmental monitoring,and medical diagnostics.This comprehensive review thoroughly examines recent progress,identifies prevailing technical challenges,and outlines prospects for gas detection technology utilizing field effect transistors.The primary aim is to provide a valuable reference for driving the development of the next generation of gas-sensitive monitoring and detection systems characterized by improved sensitivity,selectivity,and intelligence.
基金supported by the NSFC(52522314,52473200,52450063,52120105006,51925306)the National Key R&D Program of China(2018FYA 0305800)+2 种基金the Key Research Program of Chinese Academy of Sciences(XDPB08-2)the Youth Innovation Promotion Asso-ciation of Chinese Academy of Sciences(2022165)the Fundamental Research Funds for the Central Universities(E3ET1803).
文摘The strong electron-phonon coupling in organic photovoltaic materials significantly impedes exciton transport and promotes charge recombination,thereby exerting a detrimental effect on the overall performance of organic solar cells(OSCs).Mitigating electron-phonon coupling is therefore essential for developing high-performance OSCs.In this work,we introduce two solid additives,1-bromo-3-chloronaphthalene(BCN-1)and 1-chloro-3-bromonaphthalene(BCN-2),into the bulk heterojunction active layer to address this fundamental challenge.We demonstrate that BCN-2 effectively suppresses high-frequency lattice vibrations,which minimizes electron-phonon scattering and thereby promotes efficient and long-range exciton diffusion.As a result,the BCN-2 processed devices exhibit prolonged exciton lifetime and superior charge carrier mobility compared to the control devices.These synergistic improvements in photophysical properties such as charge transport,contribute to a remarkable power conversion efficiency of 19.72%in the PM6:L8-BO-based OSCs.This work underscores the suppression of electron-phonon coupling as a critical and general strategy for advancing the performance of organic photovoltaic devices.
