In recent years,all-inorganic perovskite materials have been considered and applied in various fields.In this work,we used an improved method to synthesize novel zero-dimensional(0D)lead-free Cs_(2)Mn(Cl/Br)_(4)·...In recent years,all-inorganic perovskite materials have been considered and applied in various fields.In this work,we used an improved method to synthesize novel zero-dimensional(0D)lead-free Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O perovskite-analogue nanocrystals(PA NCs)under aerobic conditions.At the same time,lead(Pb)was introduced into manganese(Mn)halide perovskite-analogue nanocrystals of Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O via a hot-injection method.The PA NCs shows an intense orange light under a UV lamp.The fluorescence spectrum peak center of the PA NCs is located at around 598 nm,and the photoluminescence quantum yield(PLQY)is 41.12%.The PLQY of the original PA NCs was almost nonexistent at around 598 nm.The increase in PLQY was due to the replacement of Mn^(2+)with Pb^(2+),which effectively promotes the transfer of excitation energy to Mn^(2+).The Pb^(2+)-doped Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O PA NCs also exhibit excellent stability and strong PL.We also applied the PA NCs to composite paper.The properties described in this study provide new design ideas and directions for potential optronic devices.展开更多
基金supported by the Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation(Jiangxi University of Science and Technology)(TTREP2022YB04)the National Natural Science Foundation of China(51872269,52274273)+2 种基金the Science and Technology Research Project of Hubei Provincial Department of Education(B2021091)the Hubei Key Laboratory for New Textile Materials and Applications(Wuhan Textile University)(FZXCL202107)the Open Project Program of High-Tech Organic Fibers Key Laboratory of Sichuan Province.
文摘In recent years,all-inorganic perovskite materials have been considered and applied in various fields.In this work,we used an improved method to synthesize novel zero-dimensional(0D)lead-free Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O perovskite-analogue nanocrystals(PA NCs)under aerobic conditions.At the same time,lead(Pb)was introduced into manganese(Mn)halide perovskite-analogue nanocrystals of Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O via a hot-injection method.The PA NCs shows an intense orange light under a UV lamp.The fluorescence spectrum peak center of the PA NCs is located at around 598 nm,and the photoluminescence quantum yield(PLQY)is 41.12%.The PLQY of the original PA NCs was almost nonexistent at around 598 nm.The increase in PLQY was due to the replacement of Mn^(2+)with Pb^(2+),which effectively promotes the transfer of excitation energy to Mn^(2+).The Pb^(2+)-doped Cs_(2)Mn(Cl/Br)_(4)·2H_(2)O PA NCs also exhibit excellent stability and strong PL.We also applied the PA NCs to composite paper.The properties described in this study provide new design ideas and directions for potential optronic devices.
