Self-powered gas sensor based on SiNWs/ITO photodiode.

ABSTRACT: Silicon nanowires (SiNWs) with a large surface-to-volume ratio and a low reflectivity are exceedingly attractive building blocks for developing high performance light harvesting devices. Herein, a SiNW/ITO heterojunction was fabricated easily by just compressing the SiNWs and ITO electrode together with a suitable pressure. Under light illumination, the SiNWs/ITO with an optimized structure can generate more than 20 μA photocurrent at zero bias voltage. In the mean time, the photocurrent is very sensitive to NO₂ infiltration into the forest of SiNWs and displays a non-linear relationship with the concentration of NO₂ from 0 to 1000 ppb. In comparison with chemiresistive sensors based on SiNWs only, the sensitivity of the self-powered sensor was improved obviously, sho

SUBMITTER: Liu D 

PROVIDER: S-EPMC9069332 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature