Enabling Fast Photoresponse in Hybrid Perovskite/MoS2 Photodetectors by Separating Local Photocharge Generation and Recombination

• DOI: 10.1021/acs.nanolett.4c03950
• Publication Date: 2024-11-04T19:27:42Z
• Authors: Jingfeng Song; Tianlin Li; Wenhao Li; Zhiyong Xiao; Bo Chen; Dawei Li; Stephen Ducharme; Yongfeng Lu; Jinsong Huang; Rashid Zia; Xia Hong

Interfacing CH3NH3PbI3 (MAPbI3) with 2D van der Waals materials in lateral photodetectors can suppress the dark current and driving voltage, while interlayer charge separation also renders slower dynamics. In this work, we show that more than one order of magnitude faster photoresponse time be achieved MAPbI3/MoS2 by locally separating photocharge generation recombination through a parallel channel single-layer MAPbI3. Photocurrent (Iph) mapping reveals electron diffusion lengths about 20 μm MAPbI3 4 heterostructure. The illumination-power scaling Iph time-resolved photoluminescence studies point to dominant roles heterostructure region photogeneration recombination. Our results shed new light on material design concurrently enhance photoresponsivity, reduce sustain high operation speed, paving path for developing high-performance based hybrid perovskites.