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Seo, Kwanyong
The SEO Group
Research Interests
  • Flexible solar cell, transparent solar cell, PV-battery hybrid system, hetero-junction solar cell

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Si Microwire Solar Cells: Improved Efficiency with a Conformal SiO2 Layer

Cited 9 times inthomson ciCited 5 times inthomson ci
Title
Si Microwire Solar Cells: Improved Efficiency with a Conformal SiO2 Layer
Author
Seo, KwanyongYu, Young J.Duane, PeterZhu, WenqiPark, HyunsungWober, MunibCrozier, Kenneth B.
Keywords
antireflection; light trapping; microwire; radial junction; silicon; solar cells
Issue Date
2013-06
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.7, no.6, pp.5539 - 5545
Abstract
Silicon microwire arrays have attracted considerable attention recently due to the opportunity they present as highly efficient and cost-effective solar cells. In this study, we report on efficient Si microwire array solar cells with areas of 1 cm2 and Air Mass 1.5 Global conversion efficiencies of up to 10.6%. These solar cells show an open-circuit voltage of 0.56 V, a short-circuit current density of 25.2 mA/cm2, and a fill factor of 75.2%, with a silicon absorption region that is only 25 μm thick. In particular, the maximum overall efficiency of the champion device is improved from 8.71% to 10.6% by conformally coating the wires with a 200 nm thick SiO2 layer. Optical measurements reveal that the layer reduces reflection significantly over the entire visible range.
URI
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DOI
10.1021/nn401776x
ISSN
1936-0851
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ECHE_Journal Papers
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