High responsivity of hybrid MoTe<sub>2</sub>/perovskite heterojunction photodetectors
An Xie, Yuxian Jian, Zichao Cheng, Yu Gu, Zhanyang Chen, Xiufeng Song, Zaixing Yang
Abstract
Abstract Two-dimensional (2D) van der Waals heterojunction offers alternative facile platforms for many optoelectronic devices due to no-dangling bonds and steep interface carrier gradient. Here, we demonstrate a 2D heterojunction device, which combines the benefits of high carrier mobility of 2D MoTe 2 and strong light absorption of perovskite, to achieve excellent responsivity. This device architecture is constructed based on the charge carriers separation and transfer with the high-gain photogating effect at the interface of the heterojunction. The device exhibits high responsivity of 334.6 A W −1 , impressive detectivity of 6.2 × 10 10 Jones. All the results provide the insight into the benefits of interfacial carriers transfer for designing hybrid perovskite-2D materials based optoelectronic devices.