Millimeter-Scale Nonlocal Photo-Sensing Based on Single-Crystal Perovskite Photodetector
Yu-Tao Li,
Guang-Yang Gou,
Lin-Sen Li,
He Tian,
Xin Cong,
Zhen-Yi Ju,
Ye Tian,
Xiang-Shun Geng,
Ping-Heng Tan,
Yi Yang,
Tian-Ling Ren
Affiliations
Yu-Tao Li
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Guang-Yang Gou
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Lin-Sen Li
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
He Tian
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China; Corresponding author
Xin Cong
State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, PR China
Zhen-Yi Ju
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Ye Tian
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Xiang-Shun Geng
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Ping-Heng Tan
State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, PR China
Yi Yang
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China
Tian-Ling Ren
Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China; Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, PR China; Corresponding author
Summary: Organometal trihalide perovskites (OTPs) are promising optoelectronic materials for high-performance photodetectors. However, up to now, traditional polycrystal OTP-based photodetectors have demonstrated limited effective photo-sensing range. Recently, bulk perovskite single crystals have been seen to have the potential for position-sensitive photodetection. Herein, for the first time, we demonstrate a position-dependent photodetector based on perovskite single crystals by scanning a focused laser beam over the device perpendicular to the channel. The photodetector shows the best-ever effective photo-sensing distance up to the millimeter range. The photoresponsivity and photocurrent decrease by nearly an order of magnitude when the beam position varies from 0 to 950 μm and the tunability of carrier diffusion length in CH3NH2PbBr3 with the variation of the exciting laser intensity is demonstrated. Furthermore, a numerical model based on transport of photoexcited carriers is proposed to explain the position dependence. This photodetector shows excellent potential for application in future nanoelectronics and optoelectronics systems. : Physics; Photonics; Optical Materials Subject Areas: Physics, Photonics, Optical Materials
