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서관용

Seo, Kwanyong
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17.6% efficient radial junction solar cells using silicon nano/micro hybrid strucuture

Author(s)
최덕재김형우서관용
Issued Date
2016-04-21
URI
https://scholarworks.unist.ac.kr/handle/201301/41437
Fulltext
http://image.kcsnet.or.kr/file/abstract/117/data/html/51_0520_133.htm
Citation
대한화학회 제 117회 총회 및 학술발표회
Abstract
We developed a unique nano/micro hybrid structure by selectively modifying only the top of a microwire using metal-assisted chemical etching. The fabricated nano/micro hybrid structure not only minimized surface recombination but also absorbed 97% of incident light under AM 1.5G illumination, demonstrating outstanding light absorption compared to that of planar (59%) and microwire arrays (85%). We report on high-efficiency Si nano/micro hybrid structure solar cells with areas of 1 cm2 and a power conversion efficiency (Eff) of up to 17.6% under AM 1.5G illumination. In particular, the solar cell shows a high short-circuit current density (Jsc) of 39.5 mA·cm-2, because of the high light-absorbing characteristics of the structure. This corresponds to an approximately 61.5% and 16.5% increase in efficiency compared to that of a solar cell (Eff = 10.9%) based on the planar silicon structure and a solar cell (Eff = 15.1%) based on the microwire arrays, respectively. Hence, we expect the nano/micro hybrid structure developed through this study to become a foundation technology for the development of cost-effective and highly efficient solar cells.
Publisher
대한화학회

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