Opto-electronic coupling in semiconductors: Towards ultrasensitive pressure sensing
Article
Article Title | Opto-electronic coupling in semiconductors: Towards ultrasensitive pressure sensing |
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ERA Journal ID | 201060 |
Article Category | Article |
Authors | Nguyen, Thanh (Author), Dinh, Toan (Author), Phan, Hoang-Phuong (Author), Nguyen, Tuan-Khoa (Author), Foisal, Abu Riduan Md (Author), Nguyen, Nam-Trung (Author) and Dao, Dzung Viet (Author) |
Journal Title | Journal of Materials Chemistry C |
Journal Citation | 8 (14), pp. 4713-4721 |
Number of Pages | 9 |
Year | 2020 |
Publisher | The Royal Society of Chemistry |
Place of Publication | United Kingdom |
ISSN | 2050-7526 |
2050-7534 | |
Digital Object Identifier (DOI) | https://doi.org/10.1039/d0tc00229a |
Web Address (URL) | https://pubs.rsc.org/en/content/articlelanding/2020/tc/d0tc00229a#!divAbstract |
Abstract | The discovery of a giant piezoresistive effect in a semiconductor heterojunction by optoelectronic coupling can open a new era for mechanical sensors. This paper develops a novel concept of opto-electronic coupling in semiconductor heterojunctions for pressure sensing. We employ non-uniform illumination of visible light on a SiC/Si heterojunction to generate a gradient of charge carriers in the SiC nanofilm. These charge carriers are then manipulated by a tuning current, producing giant relative resistance changes in the material under applied pressure. We successfully demonstrated the enhancement by opto-electronic coupling in a SiC/Si heterojunction pressure sensor of sensitivity up to 185[thin space (1/6-em)]000 times compared to the unilluminated condition. In addition, the opto-electronic coupling enables significantly improved repeatability, stability, signal-to-noise ratio and detectable range of the pressure sensor. The ultrahigh sensitive pressure sensing mechanism by opto-electronic coupling will pave a way for development of extremely sensitive mechanical sensors |
Keywords | Sensor; skin; piezoresistance; transparent; platform; energy |
ANZSRC Field of Research 2020 | 401705. Microelectromechanical systems (MEMS) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Griffith University |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5w6q/opto-electronic-coupling-in-semiconductors-towards-ultrasensitive-pressure-sensing
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