Heterostructured WS2/CH3NH3PbI3 Photoconductors with Suppressed Dark Current and Enhanced Photodetectivity
Advanced Materials2016Vol. 28(19), pp. 3683–3689
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Chun Ma, Yumeng Shi, Weijin Hu, Ming‐Hui Chiu, Zhixiong Liu, Ashok Bera, Feng Li, Hong Wang, Lain‐Jong Li, Tom Wu
Abstract
Heterostructured photoconductors based on hybrid perovskites and 2D transition-metal dichalcogenides are fabricated and characterized. Due to the superior properties of CH3 NH3 PbI3 and WS2 , as well as the efficient interfacial charge transfer, such photoconductors show high performance with on/off ratio of ≈10(5) and responsivity of ≈17 A W(-1) . Furthermore, the response times of the heterostructured photoconductors are four orders of magnitude faster compared to the counterpart of a perovskite single layer.
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