High-Performance Self-Powered Photoelectrochemical Detection Using Scalable InGaN/GaN Nanowire Arrays

Kishan Lal Kumawat; Md. Afjalur Rahman; Nirmal Anand; Dipon Kumar Ghosh; Christy Giji Jenson; Md. Moinul Islam; Samuel Olakunle Adigbo; Sheik Munim Hussain; Md Zunaid Baten; Sharif Md. Sadaf

arXiv · 2507.06501

High-Performance Self-Powered Photoelectrochemical Detection Using Scalable InGaN/GaN Nanowire Arrays

Kishan Lal Kumawat·Md. Afjalur Rahman·Nirmal Anand·Dipon Kumar Ghosh·Christy Giji Jenson·Md. Moinul Islam·Samuel Olakunle Adigbo·Sheik Munim Hussain·Md Zunaid Baten·Sharif Md. Sadaf

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Abstract

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

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Kishan Lal Kumawat, Md. Afjalur Rahman, Nirmal Anand, Dipon Kumar Ghosh, Christy Giji Jenson, Md. Moinul Islam, Samuel Olakunle Adigbo, Sheik Munim Hussain, Md Zunaid Baten, Sharif Md. Sadaf. 2025-07-09. High-Performance Self-Powered Photoelectrochemical Detection Using Scalable InGaN/GaN Nanowire Arrays. https://arxiv.org/abs/2507.06501

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