Heterostructured WS2 /CH3 NH3 PbI3 Photoconductors with Suppressed Dark Current and Enhanced Photodetectivity

Chun Ma; Yumeng Shi; Weijin Hu; Ming-Hui Chiu; Zhixiong Liu; Ashok Bera; Feng Li; Hong Wang; Lain-Jong Li; Tom Wu

doi:10.1002/adma.201600069

Heterostructured WS2 /CH3 NH3 PbI3 Photoconductors with Suppressed Dark Current and Enhanced Photodetectivity

Adv Mater. 2016 May;28(19):3683-9. doi: 10.1002/adma.201600069. Epub 2016 Mar 23.

Authors

Chun Ma¹, Yumeng Shi¹, Weijin Hu¹, Ming-Hui Chiu¹, Zhixiong Liu¹, Ashok Bera¹, Feng Li¹, Hong Wang¹, Lain-Jong Li¹, Tom Wu¹

Affiliation

¹ Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.

PMID: 27008347
DOI: 10.1002/adma.201600069

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.

Keywords: perovskites; photoconductors; transition-metal dichalcogenides.