Pu Xuan, Deng Rongli, Yang Guanzhao, Zhang Wenfeng, Lin Haibin, Li Junyong, Nötzel Richard
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, People's Republic of China.
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, 510006, People's Republic of China.
Sci Rep. 2025 Jan 27;15(1):3395. doi: 10.1038/s41598-025-87919-3.
A dual-polarity, photovoltaic photodetector for red-green dual-wavelength detection is demonstrated, operating in the self-powered mode. It is based on a core-shell n-InGaN nanowire/p-CuO heterostructure with inner upward energy band bending and near surface downward energy band bending. This produces negative photocurrent for red light illumination and positive photocurrent for green light illumination. Balanced negative and positive photocurrents are obtained by optimizing the CuO layer thickness. The imaging capability is experimentally demonstrated for real-life red and green color recognition on a mobile phone display.
展示了一种用于红绿双波长检测的双极性光伏光电探测器，其工作在自供电模式。它基于核壳结构的n-InGaN纳米线/p-CuO异质结，具有内部向上的能带弯曲和近表面向下的能带弯曲。这使得红光照射时产生负光电流，绿光照射时产生正光电流。通过优化CuO层厚度可获得平衡的正负光电流。通过实验证明了该探测器在手机显示屏上对现实生活中的红色和绿色进行颜色识别的成像能力。
