Giant Lateral Photovoltage in a SiC/Si Heterojunction with a Micro Free-Standing SiC Serpentine Beam

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Nguyen, Tuan-Hung
Pham, Tuan Anh
Vu, Trung-Hieu
Nguyen, Hong-Quan
Duran, Pablo Guzman
Streed, Erik W
Fastier-Wooller, Jarred William
Dau, Van Thanh
Nguyen, Nam-Trung
Dao, Dzung Viet
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2022
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Abstract

The lateral photovoltaic effect (LPE) is being explored as a promising method for energy harvesting and self-powered sensing. Herein we propose a free-standing SiC serpentine micro beam structure that is capable of generating a giant lateral photovoltage (LPV) of 191 mV under illumination from a 637 nm laser. We observed a photoresponse from the SiC beam even under a relatively weak illumination of 1 μW. The unique design of the free-standing SiC micro beam hinders the diffusion of photogenerated charge carriers, resulting in a high charge carrier concentration gradient, capable of generating a giant LPV. Our findings in this work demonstrate the potential for the development of miniaturized energy generators and self-powered sensors from the SiC/Si heterojunction.

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ACS Applied Energy Materials

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5

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8

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Microelectromechanical systems (MEMS)

Microelectronics

Chemical sciences

Engineering

Science & Technology

Physical Sciences

Technology

Chemistry, Physical

Energy & Fuels

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Nguyen, T-H; Pham, TA; Vu, T-H; Nguyen, H-Q; Duran, PG; Streed, EW; Fastier-Wooller, JW; Dau, VT; Nguyen, N-T; Dao, DV, Giant Lateral Photovoltage in a SiC/Si Heterojunction with a Micro Free-Standing SiC Serpentine Beam, ACS Applied Energy Materials, 2022, 5 (8), pp. 9830-9836

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