Constructing Sensitive and Fast Lead-Free Single-Crystalline Perovskite Photodetectors

被引:104
作者
Yang, Bin [1 ,2 ]
Li, Ya-Juan [1 ,2 ]
Tang, Yu-Xuan [1 ,2 ]
Mao, Xin [1 ,2 ]
Luo, Cheng [1 ,2 ]
Wang, Mei-Shan [4 ]
Deng, Wei-Qiao [1 ,3 ]
Han, Ke-Li [1 ,3 ]
机构
[1] Chinese Acad Sci, DICP, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 10049, Peoples R China
[3] Shandong Univ, Inst Mol Sci & Engn, Qingdao 266237, Peoples R China
[4] Ludong Univ, Sch Phys & Optoelect Engn, Yantai 264025, Peoples R China
来源
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 11期
基金
中国国家自然科学基金;
关键词
PHOTOVOLTAIC APPLICATIONS; HALIDE PEROVSKITES; UV PHOTODETECTORS; FAST-RESPONSE; NARROW-BAND; HIGH-GAIN; GROWTH; LIGHT; RECOMBINATION; TRANSITIONS;
D O I
10.1021/acs.jpclett.8b01116
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We developed a high-performance photodetector based on (CH3NH3)(3)Sb2I9 (MA(3)Sb(2)I(9)) microsingle crystals (MSCs). The MA(3)Sb(2)I(9) single crystals exhibit a low-trap state density of similar to 10(10) cm(-3) and a long carrier diffusion length reaching 3.0 mu m, suggesting its great potential for optoelectronic applications. However, the centimeter single crystal (CSC)-based photodetector exhibits low responsivity (10(-6) A/W under 1 sun illumination) due to low charge-carrier collection efficiency. By constructing the MSC photodetector with efficient charge-carrier collection, the responsivity can be improved by three orders of magnitude (under 1 sun illumination) and reach 40 A/W with monochromatic light (460 nm). Furthermore, the MSC photodetectors exhibit fast response speed of <1 ms, resulting in a high gain of 10(8) and a gain-bandwidth product of 10(5) Hz. These numbers are comparable to the lead-perovskite single-crystal-based photodetectors.
引用
收藏
页码:3087 / 3092
页数:11
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