Perovskite/GaAs-nanowire hybrid structure photodetectors with ultrafast multiband response enhancement by band engineering  

作　　者：XIAOBING HOU XITONG HONG FENGYUAN LIN JINZHI CUI QIAN DAI QIANLEI TIAN BINGHENG MENG YANJUN LIU JILONG TANG KEXUE LI LEI LIAO ZHIPENG WEI 

机构地区：[1]State Key Laboratory of High Power Semiconductor Lasers,College of Physics,Changchun University of Science and Technology,Changchun 130022,China [2]State Key Laboratory for Chemo/Biosensing and Chemometrics,College of Semiconductors(College of Integrated Circuits),Hunan University,Changsha 410082,China [3]Department of Laser Photoelectric Technology,Southwest Institute of Technical Physics,Chengdu 610041,China [4]Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen 518055,China [5]Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 442000,China

出　　处：《Photonics Research》2023年第4期541-548,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(11804335,12074045,61904017,62027820);OpenFoundation of Key Laboratory of Laser Technology;China North Industries Group Corporation Limited(KLLDT202105);Youth Foundation of ChangchunUniversity of Science and Technology(XQNJJ-2018-18);“111”Project of China(D17017)。

摘　　要：We developed a hybrid structure photodetector combining one-dimensional(1D)inorganic GaAs nanowires and two-dimensional(2D)organic perovskite materials,which can achieve various performance enhancements using a relatively simple structure.Via the optical absorption enhancement of perovskite and the type-II energy band structure formed by the heterostructure,the responsivity and detectivity of the photodetector from ultraviolet(UV)to visible(Vis)wavelengths are significantly enhanced,reaching 75 A/W and 1.49×10^(11)Jones,respectively.The response time of the photodetector was significantly decreased by 3 orders,from 785 ms to 0.5 ms,and the dark current was further reduced to 237 fA.A photodetector was prepared with enhanced responsivity and ultrafast response time in the multiband region from the UV to Vis wavelength.To the best of our knowledge,this is the first time to combine inorganicⅢ-ⅤGaAs nanomaterials with organic perovskite materials,which verifies the effective combination of inorganic and organic materials in a mixed dimension.The excellent photoelectric performance of the perovskite/GaAs-nanowire hybrid structure photodetector makes it a potential candidate material for a wide range of photoelectric applications such as multiband photodetection.

关 键 词：PEROVSKITE nanowires INORGANIC 

分 类 号：TN36[电子电信—物理电子学]