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Issue 11, 2014
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Inorganic/organic hybrid solar cells: optimal carrier transport in vertically aligned silicon nanowire arrays

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Abstract

Inorganic/organic hybrid radial heterojunction solar cells that combine vertically-aligned n-type silicon nanowires (SiNWs) with poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS) have great potential for replacing commercial Si solar cells. The chief advantage of such solar cells is that they exhibit higher absorbance for a given thickness than commercial Si solar cells, due to incident light-trapping within the NW arrays, thus enabling lower-cost solar cell production. We report herein on the effects of NW length, annealing and surface electrode on the device performance of SiNW/PEDOT:PSS hybrid radial heterojunction solar cells. The power conversion efficiency (PCE) of the obtained SiNW/PEDOT:PSS hybrid solar cells can be optimized by tuning the thickness of the surface electrode, and the etching conditions during NW formation and post-annealing. The PCE of 9.3% is obtained by forming efficient transport pathways for photogenerated charge carriers to electrodes. Our approach is a significant contribution to design of high-performance and low-cost inorganic/organic hybrid heterojunction solar cells.

Graphical abstract: Inorganic/organic hybrid solar cells: optimal carrier transport in vertically aligned silicon nanowire arrays

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Supplementary files

Article information


Submitted
10 Feb 2014
Accepted
25 Mar 2014
First published
01 Apr 2014

Nanoscale, 2014,6, 6092-6101
Article type
Paper

Inorganic/organic hybrid solar cells: optimal carrier transport in vertically aligned silicon nanowire arrays

K. Sato, M. Dutta and N. Fukata, Nanoscale, 2014, 6, 6092
DOI: 10.1039/C4NR00733F

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