3C-SiC/Si Heterostructure: An excellent platform for position-sensitive detectors based on photovoltaic effect

Foisal, Abu Riduan Md and Nguyen, Thanh and Dinh, Toan ORCID: https://orcid.org/0000-0002-7489-9640 and Nguyen, Tuan-Khoa and Tanner, Philip and Streed, Erik W. and Dao, Dzung Viet (2019) 3C-SiC/Si Heterostructure: An excellent platform for position-sensitive detectors based on photovoltaic effect. ACS Applied Materials and Interfaces, 11 (43). pp. 40980-40987. ISSN 1944-8244


Abstract

Single-crystalline silicon carbide (3C-SiC) on the Si substrate has drawn significant attention in recent years due to its low wafer cost and excellent mechanical, chemical, and optoelectronic properties. However, the applications of the structure have primarily been focused on piezoresistive and pressure sensors, bio-microelectromechanical system, and photonics. Herein, we report another promising application of the heterostructure as a laser spot position-sensitive detector (PSD) based on the lateral photovoltaic effect (LPE) under nonuniform optical illuminations at zero-bias conditions. The LPE shows a linear dependence on spot positions, and the sensitivity is found to be as high as 33 mV/mm under an illumination of 2.8 W/cm2 (635 nm). The structure also exhibits a linear dependence of the LPE over a large distance (7 mm) between two electrodes, which is crucial for PSDs as the region with a linear dependence of LPE is only usable for PSDs. The LPE at different spot positions and under different illumination conditions have been investigated and explained based on the energy-band analysis. The temperature dependence of the LPE and position sensitivity is also investigated. Furthermore, the two-dimensional mapping of the lateral photovoltages reveals the potential for utilizing the 3C-SiC/Si heterostructure to detect the laser spot position precisely on a plane.


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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 Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Date Deposited: 29 Jul 2020 04:34
Last Modified: 31 Aug 2020 01:03
Uncontrolled Keywords: 3C-SiC/Si heterostructure; position detector; lateral photovoltaic effect; energy-band analysis; harsh environments
Fields of Research (2008): 09 Engineering > 0913 Mechanical Engineering > 091306 Microelectromechanical Systems (MEMS)
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401705 Microelectromechanical systems (MEMS)
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: https://doi.org/10.1021/acsami.9b15855
URI: http://eprints.usq.edu.au/id/eprint/38146

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