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Issue 30, 2016
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17.6%-Efficient radial junction solar cells using silicon nano/micro hybrid structures

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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.

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

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Article information


Submitted
07 Jun 2016
Accepted
27 Jun 2016
First published
28 Jun 2016

Nanoscale, 2016,8, 14473-14479
Article type
Paper

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

K. Lee, I. Hwang, N. Kim, D. Choi, H. Um, S. Kim and K. Seo, Nanoscale, 2016, 8, 14473
DOI: 10.1039/C6NR04611H

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