Ultraviolet-Visible-Short-Wavelength Infrared Broadband and Fast-Response Photodetectors Enabled by Individual Monocrystalline Perovskite Nanoplate |
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Authors: | Luyao Mei Kai Zhang Nan Cui Wenzhi Yu Yang Li Kaiwen Gong Haozhe Li Nianqing Fu Jian Yuan Haoran Mu Zhanfeng Huang Zhengji Xu Shenghuang Lin Lu Zhu |
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Affiliation: | 1. Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, School of Microelectronics Science and Technology, Sun Yat-sen University, Zhuhai, Guangdong, 519082 P. R. China;2. Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 P. R. China;3. Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 P. R. China
School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640 P. R. China |
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Abstract: | Perovskite-based photodetectors exhibit potential applications in communication, neuromorphic chips, and biomedical imaging due to their outstanding photoelectric properties and facile manufacturability. However, few of perovskite-based photodetectors focus on ultraviolet-visible-short-wavelength infrared (UV–Vis–SWIR) broadband photodetection because of the relatively large bandgap. Moreover, such broadband photodetectors with individual nanocrystal channel featuring monolithic integration with functional electronic/optical components have hardly been explored. Herein, an individual monocrystalline MAPbBr3 nanoplate-based photodetector is demonstrated that simultaneously achieves efficient UV–Vis–SWIR detection and fast-response. Nanoplate photodetectors (NPDs) are prepared by assembling single nanoplate on adjacent gold electrodes. NPDs exhibit high external quantum efficiency (EQE) and detectivity of 1200% and 5.37 × 1012 Jones, as well as fast response with rise time of 80 µs. Notably, NPDs simultaneously achieve high EQE and fast response, exceeding most perovskite devices with multi-nanocrystal channel. Benefiting from the high specific surface area of nanoplate with surface-trap-assisted absorption, NPDs achieve high performance in the near-infrared and SWIR spectral region of 850–1450 nm. Unencapsulated devices show outstanding UV-laser-irradiation endurance and decent periodicity and repeatability after 29-day-storage in atmospheric environment. Finally, imaging applications are demonstrated. This work verifies the potential of perovskite-based broadband photodetection, and stimulates the monolithic integration of various perovskite-based devices. |
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Keywords: | broadband photodetection imaging perovskite nanoplates short-wavelength photodetectors sub-bandgap absorption |
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