Ultrasensitive Self-Powered Position-Sensitive Detector Based on n‑3C-SiC/p-Si Heterojunctions

Nguyen, Tuan-Hung and Nguyen, Thanh ORCID: https://orcid.org/0000-0002-3213-6178 and Foisal, Abu Riduan Md and Pham, Tuan Anh and Dinh, Toan ORCID: https://orcid.org/0000-0002-7489-9640 and Streed, Erik W. and Vu, Trung-Hieu and Fastier-Wooller, Jarred and Duran, Pablo Guzman and Dau, Van Thanh and Nguyen, Nam-Trung and Dao, Dzung Viet (2022) Ultrasensitive Self-Powered Position-Sensitive Detector Based on n‑3C-SiC/p-Si Heterojunctions. ACS Applied Electronic Materials, 4 (2). pp. 768-775.


Abstract

Cubic silicon carbide (3C-SiC) on silicon (Si) is an excellent platform for developing sensors that can function in a harsh environment due to its superior mechanical, electrical, chemical, optoelectronic properties and low wafer cost. Here, we report a position-sensitive detector (PSD) based on the heterojunction formed between n-type SiC and p-type Si. The PSD utilizes the lateral photovoltaic effect (LPE) with a linear dependence of LPE on laser spot positions. The position sensitivity is found to be 554.82 mV/mm at zero bias conditions under an illumination of 200 μW (637 nm), which is among the most sensitive LPE-based PSDs to date. The generation of the lateral photovoltage (LPV) under light illumination is investigated by examining the band diagram of the 3C-SiC/Si heterojunction. The influence of the illumination intensity and wavelength on the position sensitivity is also explained. This work demonstrates a potential application for ultrasensitive, self-powered optoelectronic sensing of the n-3C-SiC/p-Si platform.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 30 May 2022 03:06
Last Modified: 30 May 2022 03:06
Uncontrolled Keywords: 3C-SiC/Si; lateral photovoltaic effect; optoelectronic; position-sensitive detector; self-powered
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401705 Microelectromechanical systems (MEMS)
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1021/acsaelm.1c01156
URI: http://eprints.usq.edu.au/id/eprint/48668

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