Issue 1, 2025

Recycled silicon solar cell-derived nanostructured p-black silicon device for high performance NO2 gas sensor applications

Abstract

Nitrogen dioxide (NO2) is a toxic gas that can cause respiratory problems, and sensing its presence is crucial for environmental monitoring and industrial safety. This investigation presents a novel approach towards sensing NO2 gas by utilizing partially completed/recycled silicon solar cells employing a metal-assisted etching process to fabricate a high-performance p-black-silicon based sensor. Structural and morphological analyses using X-ray diffraction patterns, Raman spectroscopy and cross sectional FESEM characterization confirm the integrity of the p-B-silicon sensor. By combining recycling techniques with advanced fabrication methods, the resulting sensor exhibits exceptional sensitivity, a low detection limit of 1 ppm, and rapid response times (12–14 s) when exposed to NO2 gas concentrations ranging from 1 to 5 ppm. The enhanced sensitivity is attributed to the unique nanostructured comb-like morphology of the sensor material, which facilitates fast charge transport mechanisms, and a plausible sensing mechanism has been proposed and explained using a depletion model diagram and energy model diagram. This eco-friendly and cost-effective solution not only addresses electronic waste concerns but also highlights the potential of sustainable practices in scientific research. The findings emphasize on the importance of environmental consciousness and innovation, showcasing a promising future for gas sensing technology. By utilizing recycled materials and advanced fabrication techniques, this study contributes to the development of efficient, eco-friendly sensors for environmental monitoring applications, paving the way for a more sustainable and technologically advanced future in the field of gas sensors.

Graphical abstract: Recycled silicon solar cell-derived nanostructured p-black silicon device for high performance NO2 gas sensor applications

Supplementary files

Article information

Article type
Paper
Submitted
22 Aug 2024
Accepted
10 Nov 2024
First published
22 Nov 2024
This article is Open Access
Creative Commons BY-NC license

RSC Appl. Interfaces, 2025,2, 220-229

Recycled silicon solar cell-derived nanostructured p-black silicon device for high performance NO2 gas sensor applications

M. Aleem, R. Vishnuraj and B. Pullithadathil, RSC Appl. Interfaces, 2025, 2, 220 DOI: 10.1039/D4LF00299G

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