Highly Efficient Bifacial Silicon/Silicon Tandem Solar Cells

Jaeun Kim; Sunhwa Lee; Somin Park; Minkyu Ju; Youngkuk Kim; Eun-Chel Cho; Suresh Kumar Dhungel; Junsin Yi

doi:10.1109/ACCESS.2023.3248795

IEEE Access (Jan 2023)

Highly Efficient Bifacial Silicon/Silicon Tandem Solar Cells

Jaeun Kim,
Sunhwa Lee,
Somin Park,
Minkyu Ju,
Youngkuk Kim,
Eun-Chel Cho,
Suresh Kumar Dhungel,
Junsin Yi

Affiliations

Jaeun Kim: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, South Korea
Sunhwa Lee: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, South Korea
Somin Park: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, South Korea
Minkyu Ju: College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea
Youngkuk Kim: College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea
Eun-Chel Cho: College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea
Suresh Kumar Dhungel: ORCiD; College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea
Junsin Yi: ORCiD; College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea

DOI: https://doi.org/10.1109/ACCESS.2023.3248795
Journal volume & issue: Vol. 11
pp. 21326 – 21331

Abstract

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Silicon-based tandem solar cells with efficient use of the solar spectrum are desirable for a next generation-commercial photovoltaic system. It has been widely investigated elsewhere using perovskites or III-V cells as top cell materials for high efficiency and stability. However, perovskite and III-V top cells are still unsuitable for mass production as well as expansion and integration with silicon solar cell production processes so far. Two-terminal bifacial Si/Si tandem cell by bonding with transparent conductive adhesive (TCA) is reported here. The current matching can maximize the efficiency by controlling the opening area of the top cell, which makes the bottom cell also able to absorb sunlight in the short wavelength region that is absorbed by the top cell as well, without being limited to the thickness or bandgap of the top cell. The Si/Si tandem solar cell achieved short circuit current density of 25.195 mA/cm2 after current matching by 36% opening ratio of top cell.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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