Photovoltaic Field-Effect Photodiodes Based on Double van der Waals Heterojunctions

Yurong Jiang; Ruiqi Wang; Xueping Li; Zinan Ma; Lin Li; Jian Su; Yong Yan; Xiaohui Song; Congxin Xia

doi:10.1021/acsnano.1c02830

Photovoltaic Field-Effect Photodiodes Based on Double van der Waals Heterojunctions

ACS Nano. 2021 Sep 28;15(9):14295-14304. doi: 10.1021/acsnano.1c02830. Epub 2021 Aug 26.

Authors

Yurong Jiang¹, Ruiqi Wang¹, Xueping Li¹, Zinan Ma¹, Lin Li¹, Jian Su¹, Yong Yan¹, Xiaohui Song¹, Congxin Xia¹

Affiliation

¹ School of Physics, Henan Key Laboratory of Photovoltaic Materials, Henan Normal University, Xinxiang, 453007, China.

PMID: 34435493
DOI: 10.1021/acsnano.1c02830

Abstract

High performance photodetectors based on van der Waals heterostructures (vdWHs) are crucial to developing micro-nano-optoelectronic devices. However, reports show that it is difficult to balance fast response and high sensitivity. In this work, we design a photovoltaic field-effect photodiode (PVFED) based on the WSe₂/MoS₂/WSe₂ double vdWHs, where the photovoltage that originated from one vdWH modulates the optoelectronic characteristics of another vdWH. The proposed photodiode exhibits an excellent self-powered ability with a high responsivity of 715 mA·W^-1 and fast response time of 45 μs. This work demonstrates an efficient method that optimizes the photoelectric performance of vdWH by introducing the photovoltaic field effect.

Keywords: double heterojunction; photodetector; photovoltaic field effect; self-powered; van der Waals heterostructures.