Affiliation:
1. Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 P. R. China
2. Beijing Key Laboratory for Advanced Energy Materials and Technologies School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China
Abstract
AbstractHigh‐detectivity and stable photodetectors (PDs) have been intensively concerned in the field of wireless optical communication, among which perovskite material has become a prospective candidate owing to its outstanding photoelectric properties. However, the defects and mismatched energy levels of perovskite material can significantly reduce the detectivity and stability of PDs. Herein, the CsPbBr2I quantum dots (CQDs) with the surface modulation via potassium trifluoroacetate (KTFA) are utilized to deserve high‐detectivity and stable PDs. The surface modulation for CQDs not only passivates defects by inhibiting vacancies, but also enhances hole transport capacity by modulating energy level mismatch. As a result, the assembled CsPbBr2I PDs show a responsivity of 0.375 A W−1, a detectivity of 1.12 × 1013 Jones and an on/off ratio of 104. More importantly, the CsPbBr2I PDs exhibit excellent long‐term stability for 12 weeks and can withstand 1000 bending cycles. This work provides a guideline for the development of perovskite in wireless optical communication.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Fundamental Research Funds for the Central Universities
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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