Photoelectrochemical photodetectors (PEC-PDs) are promising owing to their simple, low-cost fabrication, self-powered operation, high photoresponse, and environmental sensitivity. In this work, we report for the first time the self-powered PEC photodetection characteristics of nanowire (NW) based green-emitting InGaN/GaN multiple quantum well (MQW) PEC-PDs, fabricated via a scalable top-down approach.The device exhibits strong UV sensitivity with a peak at 365 nm and an extended response into the visible region.Notably, a high photoresponsivity of 330 mA/W was achieved at a lower illumination intensity of 0.7 mW/cm2. Furthermore, the photodetector demonstrates fast, stable, and reproducible performance across varying biases and illumination conditions. These results suggest that InGaN/GaN MQW nanowire-based PEC photodetectors hold strong promise for scalable, efficient, and stable self-powered optoelectronic applications
@article{arxiv.2507.06501,
title = {High-Performance Self-Powered Photoelectrochemical Detection Using Scalable InGaN/GaN Nanowire Arrays},
author = {Kishan Lal Kumawat and Md. Afjalur Rahman and Nirmal Anand and Dipon Kumar Ghosh and Christy Giji Jenson and Md. Moinul Islam and Samuel Olakunle Adigbo and Sheik Munim Hussain and Md Zunaid Baten and Sharif Md. Sadaf},
journal= {arXiv preprint arXiv:2507.06501},
year = {2025}
}