Heterostructured WS2/CH3NH3PbI3 Photoconductors with Suppressed Dark Current and Enhanced Photodetectivity

Heterostructured photoconductors based on hybrid perovskites and 2D transition-metal dichalcogenides are fabricated and characterized. Due to the superior properties of CH3NH3PbI3 and WS2, as well as the efficient interfacial charge transfer, such photoconductors show high performance with on/off ratio of approximate to 10(5) and responsivity of approximate to 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.