Organic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm  

具有高外量子效率和宽光谱(300～1000 nm)响应的有机-无机杂化锡基钙钛矿光电探测器（英文）

作　　者：Yukun Wang Dezhi Yang Dongge Ma Dong Ha Kim Tansir Ahamad Saad M. Alshehri Agafbnv Vadim 王玉坤;杨德志;马东阁;金东海;Tansir Ahamad;Saad M.Alshehri;Agafonv Vadim(Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology;Department of Chemistry and Nano Science,Ewha Womans University;Department of Chemistry,College of Science,King Saud University;Moscow Institute of Physics and Technology Dolgoprudny)

机构地区：[1]Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology [2]Department of Chemistry and Nano Science,Ewha Womans University [3]Department of Chemistry,College of Science,King Saud University [4]Moscow Institute of Physics and Technology Dolgoprudny

出　　处：《Science China Materials》2019年第6期790-796,共7页中国科学（材料科学（英文版）

基　　金：the International Cooperation Foundation of China (2015DFR10700);the National Natural Science Foundation of China (51403203) for the support of this research;the support of the Russian Ministry of Education and Science state assignment (3.3197.2017/ПЧ)

摘　　要：Organic-inorganic hybrid perovskites are ideal materials for photodetection owing to their high charge carrier mobility, long charge carrier diffusion length, low dark current density and sharp absorption edge. However, a relatively small band gap(1.6 e V) limits their photonharvesting efficiency in the near-infrared region. In the present work, we demonstrate a hybrid methylamine iodide and Pb-Sn binary perovskite as the light absorption layer in photodetectors. Experimentally, the wavelength of photoresponse onset for the photodetectors can be extended to as great as 1,000 nm when the Sn content of the hybrid perovskite is increased to 30 mol%. In addition, the photodetectors exhibit a photoresponsivity of 0.39 A W^-1, a specific detectivity of 7×10^12 Jones, a fast photoresponse with rise and decay time constants and an external quantum efficiency greater than 50% in the wavelength range of350–900 nm, with a maximum value of about 80% at 550 nm.有机-无机杂化钙钛矿材料具有载流子迁移率高、扩散长度长、暗电流密度低、吸收边缘锋利等优点,因而成为用于光电探测的理想材料.但是,相对较小的带隙(1.6 eV)限制了这些材料在近红外区的光子捕获效率.本研究中,我们利用碘甲胺和铅-锡二元钙钛矿作为探测器的光吸收层,导电聚合物和富勒烯作为空穴和电子传输层,铟锡氧化物和铝作为阳极和阴极制备了光电探测器件.实验结果表明,当锡的含量达到30%时,探测器的光谱响应拓宽到1000 nm.此外,我们制备的探测器的光谱响应度达到0.39 A W^(-1),归一化探测率达到7×10^(12)Jones.器件的外量子效率在350到900 nm范围内,均超过50%,在550 nm处取得最大值,超过80%.

关 键 词：organic-inorganic hybrid perovskite PHOTODETECTOR external quantum efficiency spectral response specific detectivity 

分 类 号：TH74[机械工程—光学工程]