Light-optimized photovoltaic self-powered NO2 gas sensing based on black silicon

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-08-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
Series
Sensors and Actuators, B: Chemical, Volume 340
Abstract
The NO2 sensing performance of a special lateral photovoltaic self-powered gas sensor based on the N-hyperdoped microstructured silicon (N-Si) is systematically studied under the different light illumination. The dependence of sensing characteristics on light intensity and wavelength is obtained, respectively. Results show that the sensing properties can be changed effectively by the different intensities and wavelengths, suggesting that a multidimensional regulation/optimization for the sensing characteristics is possible by light. More interestingly, the light with wavelength of 940 nm and intensity of ∼18 μW/cm2 could bring a comprehensive optimization for gas sensing, under which the N-Si sensor exhibits the excellent overall performance with simultaneously the low light power needed, good gas response, high sensitivity, wide detectable range and short response time at room temperature.
Description
Funding Information: This work is supported by the National Natural Science Foundation of China under grant no. 6207030573 , the National Basic Research Program of China (973 Program) under grant no. 2012CB934200 , and the Specialized Research Fund for the Doctoral Program of Higher Education under grant no. 20130071110018 . Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords
Black silicon, Gas sensor, Lateral photovoltaic effect, Nitrogen dioxide, Self-powered gas sensing
Other note
Citation
Zhao, Y, Liu, X L, Ma, S X, Wang, W J, Ning, X J, Zhao, L & Zhuang, J 2021, ' Light-optimized photovoltaic self-powered NO 2 gas sensing based on black silicon ', Sensors and Actuators, B: Chemical, vol. 340, 129985 . https://doi.org/10.1016/j.snb.2021.129985