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Seo, Kwanyong
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  • Flexible solar cell, transparent solar cell, PV-battery hybrid system, hetero-junction solar cell

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17.6%-Efficient radial junction solar cells using silicon nano/micro hybrid structures

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Title
17.6%-Efficient radial junction solar cells using silicon nano/micro hybrid structures
Author
Lee, KangminHwang, InchanKim, NamwooChoi, DeokjaeUm, Han-DonKim, SeungchulSeo, Kwanyong
Issue Date
2016-08
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.8, no.30, pp.14473 - 14479
Abstract
We developed a unique nano- and microwire hybrid structure by selectively modifying only the tops of microwires using metal-assisted chemical etching. The proposed nano/micro hybrid structure not only minimizes surface recombination but also absorbs 97% of incident light under AM 1.5G illumination, demonstrating outstanding light absorption compared to that of planar (59%) and microwire arrays (85%). The proposed hybrid solar cells with an area of 1 cm2 exhibit power conversion efficiencies (Eff) of up to 17.6% under AM 1.5G illumination. In particular, the solar cells show a high short-circuit current density (Jsc) of 39.5 mA cm−2 because of the high light-absorbing characteristics of the nanostructures. This corresponds to an approximately 61.5% and 16.5% increase in efficiency compared to that of a planar silicon solar cell (Eff = 10.9%) and a microwire solar cell (Eff = 15.1%), respectively. Therefore, we expect the proposed hybrid structure to become a foundational technology for the development of highly efficient radial junction solar cells.
URI
https://scholarworks.unist.ac.kr/handle/201301/20025
URL
http://pubs.rsc.org/en/content/articlelanding/2016/nr/c6nr04611h#!divAbstract
DOI
10.1039/c6nr04611h
ISSN
2040-3364
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