The emergence of all-inorganic perovskite CsPbBr_(3)has ignited significant interest in optoelectronic devices,However,CsPbBr_(3)thin film-based photodetectors face performance limitations due to grain boundaries and ...The emergence of all-inorganic perovskite CsPbBr_(3)has ignited significant interest in optoelectronic devices,However,CsPbBr_(3)thin film-based photodetectors face performance limitations due to grain boundaries and defect density.To address these challenges,we introduce a novel typeⅡheterojunction photodetector utilizing CsPbBr_(3)micro wires(MWs)and CdS nanoribbons(NBs).Remarkably,this photodetector exhibits exceptional characteristics:a high on/off current ratio(1.07×10^(5)),a responsivity of up to 1.35×10^(4)A·W^(-1),specific detectivity of 5.94×10^(15)Jones,external quantum efficiency of2.83×10^(4)%and rapid response/recovery time(400μs/3 ms).These superior performances stem from the exceptional crystalline quality of CsPbBr_(3)MWs and CdS NBs,coupled with the establishment of a typeⅡband alignment at their interface.This configuration enables efficient carrier separation while suppressing recombination.Importantly,1D CsPbBr_(3)MW/CdS NB heterojunction photodetectors demonstrate reliable imaging capabilities under visible light illumination.Our findings present an innovative solution for high-performance perovskite-based photodetectors,holding promise for future commercial applications.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.11864046 and 11764046)the Basic Research Program of Yunnan Province(Nos.202001AT070064 and 202101AT070124)+1 种基金Spring City Plan:the Highlevel Talent Promotion and Training Project of Kunming(No.2022SCP005)Yunnan Expert Workstation(No.202205AF150008)。
文摘The emergence of all-inorganic perovskite CsPbBr_(3)has ignited significant interest in optoelectronic devices,However,CsPbBr_(3)thin film-based photodetectors face performance limitations due to grain boundaries and defect density.To address these challenges,we introduce a novel typeⅡheterojunction photodetector utilizing CsPbBr_(3)micro wires(MWs)and CdS nanoribbons(NBs).Remarkably,this photodetector exhibits exceptional characteristics:a high on/off current ratio(1.07×10^(5)),a responsivity of up to 1.35×10^(4)A·W^(-1),specific detectivity of 5.94×10^(15)Jones,external quantum efficiency of2.83×10^(4)%and rapid response/recovery time(400μs/3 ms).These superior performances stem from the exceptional crystalline quality of CsPbBr_(3)MWs and CdS NBs,coupled with the establishment of a typeⅡband alignment at their interface.This configuration enables efficient carrier separation while suppressing recombination.Importantly,1D CsPbBr_(3)MW/CdS NB heterojunction photodetectors demonstrate reliable imaging capabilities under visible light illumination.Our findings present an innovative solution for high-performance perovskite-based photodetectors,holding promise for future commercial applications.
