Affiliation:
1. State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 P. R. China
2. State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences 500 Yu Tian Road Shanghai 200083 P. R. China
3. Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences No.1 SubLane Xiangshan Hangzhou 310024 P. R. China
4. Shanghai Research Center for Quantum Sciences 99 Xiupu Road Shanghai 201315 P. R. China
Abstract
AbstractOwing to the large built‐in field for efficient charge separation, heterostructures facilitate the simultaneous realization of a low dark current and high photocurrent. The lack of an efficient approach to engineer the depletion region formed across the interfaces of heterojunctions owing to doping differences hinders the realization of high‐performance van der Waals (vdW) photodetectors. This study proposes a ferroelectric‐controlling van der Waals photodetector with vertically stacked two‐dimensional (2D) black phosphorus (BP)/indium selenide (In2Se3) to realize high‐sensitivity photodetection. The depletion region can be reconstructed by tuning the polarization states generated from the ferroelectric In2Se3 layers. Further, the energy bands at the heterojunction interfaces can be aligned and flexibly engineered using ferroelectric field control. Fast response, self‐driven photodetection, and three‐orders‐of‐magnitude detection improvements are achieved in the switchable visible or near‐infrared operation bands. The results of the study are expected to aid in improving the photodetection performance of vdW optoelectronic devices.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Science and Technology Commission of Shanghai Municipality
Natural Science Foundation of Zhejiang Province
University of Science and Technology of China
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)
Cited by
13 articles.
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