Giant piezoresistive effect by optoelectronic coupling in a heterojunction
Article
Article Title | Giant piezoresistive effect by optoelectronic coupling in a heterojunction |
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ERA Journal ID | 122966 |
Article Category | Article |
Authors | Nguyen, Thanh (Author), Dinh, Toan (Author), Foisal, Abu Riduan Md (Author), Phan, Hoang-Phuong (Author), Nguyen, Tuan-Khoa (Author), Nguyen, Nam-Trung (Author) and Dao, Dzung Viet (Author) |
Journal Title | Nature Communications |
Journal Citation | 10 (1), pp. 1-8 |
Article Number | 4139 |
Number of Pages | 8 |
Year | 2019 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2041-1723 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41467-019-11965-5 |
Web Address (URL) | https://www.nature.com/articles/s41467-019-11965-5 |
Abstract | Enhancing the piezoresistive effect is crucial for improving the sensitivity of mechanical sensors. Herein, we report that the piezoresistive effect in a semiconductor heterojunction can be enormously enhanced via optoelectronic coupling. A lateral photovoltage, which is generated in the top material layer of a heterojunction under non-uniform illumination, can be coupled with an optimally tuned electric current to modulate the magnitude of the piezoresistive effect. We demonstrate a tuneable giant piezoresistive effect in a cubic silicon carbide/silicon heterojunction, resulting in an extraordinarily high gauge factor of approximately 58,000, which is the highest gauge factor reported for semiconductor-based mechanical sensors to date. This gauge factor is approximately 30,000 times greater than that of commercial metal strain gauges and more than 2,000 times greater than that of cubic silicon carbide. The phenomenon discovered can pave the way for the development of ultra-sensitive sensor technology. |
Keywords | piezoresistive effect; mechanical sensors; optoelectronic coupling; semiconductor heterojunction |
ANZSRC Field of Research 2020 | 510404. Electronic and magnetic properties of condensed matter; superconductivity |
401705. Microelectromechanical systems (MEMS) | |
401605. Functional materials | |
Byline Affiliations | Griffith University |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q588y/giant-piezoresistive-effect-by-optoelectronic-coupling-in-a-heterojunction
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