Hybrid mixed-dimensional WTe2/CsPbI3 perovskite heterojunction for high-performance photodetectors
- 21 February 2023
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 34 (19), 195201
- https://doi.org/10.1088/1361-6528/acba1c
Abstract
Perovskites have showed significant potential for the application in photodetectors due to their outstanding electrical and optical properties. Integrating two-dimensional (2D) materials with perovskites can make full use of the high carrier mobility of 2D materials and strong light absorption of perovskite to realize excellent optoelectrical properties. Here, we demonstrate a photodetector based on the WTe2/CsPbI3 heterostructure. The quenching and the shortened lifetime of photoluminescence (PL) for CsPbI3 perovskite confirms the efficient charge transfer at the WTe2/CsPbI3 heterojunction. After coupled with WTe2, the photoresponsivity of the CsPbI3 photodetector is improved by almost two orders of magnitude due to the high-gain photogating effect. The WTe2/CsPbI3 heterojunction photodetector reveals a large responsivity of 1157 A W-1 and a high detectivity of 2.1 x 10(13) Jones. The results pave the way for the development of high-performance optoelectronic devices based on 2D materials/perovskite heterojunctions.Keywords
Funding Information
- International Science and Technology Cooperation Project of Jiangsu Province (BZ2020063)
- Major Science and Technology Innovation Project of Shandong Province (2019JZZY020242)
- Natural Science Foundation of Jiangsu Province (BK20190476)
- National Natural Science Foundation of China (62274089)
- Training Program of the Major Research Plan of the National Natural Science Foundation of China (91964103)
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