Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOT:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors  

作　　者：Xin Tang Hongsheng Jiang Zhengliang Lin Xuan Wang Wenliang Wang Guoqiang Li 

机构地区：[1]State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,People’s Republic of China [2]Department of Electronic Materials,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第3期102-116,共15页纳微快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFB3604500,No.2022YFB3604501);the National Natural Science Foundation of China(No.52172141);the Technology Development Project of Shanxi-Zheda Institude of Advanced Materials and Chemical Engineering(No.2022SX-TD017).

摘　　要：van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible photodetection.Currently,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered mode.Herein,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays firstly.The as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II heterojunction.Notably,the strain-tunable photodetection performances of device have been demonstrated.Impressively,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible photodetectors.This work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关 键 词：Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TN36[电子电信—物理电子学]