Giant piezoresistive effect by optoelectronic coupling in a heterojunction

Nguyen, Thanh and Dinh, Toan ORCID: https://orcid.org/0000-0002-7489-9640 and Foisal, Abu Riduan Md and Phan, Hoang-Phuong and Nguyen, Tuan-Khoa and Nguyen, Nam-Trung and Dao, Dzung Viet (2019) Giant piezoresistive effect by optoelectronic coupling in a heterojunction. Nature Communications, 10 (Article - 4139). pp. 1-8.

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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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Date Deposited: 30 Jan 2020 03:58
Last Modified: 24 Feb 2020 02:06
Uncontrolled Keywords: piezoresistive effect; mechanical sensors; optoelectronic coupling; semiconductor heterojunction
Fields of Research : 02 Physical Sciences > 0204 Condensed Matter Physics > 020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
09 Engineering > 0913 Mechanical Engineering > 091306 Microelectromechanical Systems (MEMS)
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970110 Expanding Knowledge in Technology
E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1038/s41467-019-11965-5
URI: http://eprints.usq.edu.au/id/eprint/37743

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