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Hybrid solar cells based on thin-film silicon and P3HT

A first step towards nano-structured devices*

Published online by Cambridge University Press:  10 January 2007

P.-J. Alet ,
S. Palacin ,
P. Roca I Cabarrocas ,
B. Kalache ,
M. Firon  and
R. de Bettignies
P.-J. Alet
Affiliation:
Laboratoire de chimie des surfaces et interfaces, CEA/DSM/DRECAM/SPCSI/LCSI, Centre de Saclay, Bât. 466, 91191 Gif-sur-Yvette Cedex, France Laboratoire de physique des interfaces et couches minces, École polytechnique, UMR 7647, 91128 Palaiseau Cedex, France
S. Palacin
Affiliation:
Laboratoire de chimie des surfaces et interfaces, CEA/DSM/DRECAM/SPCSI/LCSI, Centre de Saclay, Bât. 466, 91191 Gif-sur-Yvette Cedex, France
P. Roca I Cabarrocas
Affiliation:
Laboratoire de physique des interfaces et couches minces, École polytechnique, UMR 7647, 91128 Palaiseau Cedex, France
B. Kalache
Affiliation:
Laboratoire de physique des interfaces et couches minces, École polytechnique, UMR 7647, 91128 Palaiseau Cedex, France
M. Firon
Affiliation:
Laboratoire des composants pour le solaire, CEA/DRT/LITEN/LCS, Bât. 451, 91191 Gif-sur-Yvette Cedex, France
R. de Bettignies
Affiliation:
Laboratoire des composants pour le solaire, CEA/DRT/LITEN/LCS, Bât. 451, 91191 Gif-sur-Yvette Cedex, France
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Abstract

Hybrid concepts based on a nanoscale combination of organic and inorganic semiconductors are a promising way to enhance the cost efficiency of solar cells through a better use of the solar spectrum, a higher aspect ratio of the interface, and the good processability of polymers. A new type of solar cells has been investigated. It is based on a heterojunction between regio-regular poly(3-hexylthiophene) as an organic electron donor and silicon as an inorganic electron acceptor. In a first step towards nano-structured devices, cells made of flat thin films of these materials have been studied as a model case of the heterojunction. The materials were characterized through ellipsometry and absorption spectroscopy. The devices were studied by means of their spectral response and their I-V characteristics. By combining these results, the contribution of each layer and the mechanisms of photocurrent generation are explained. The best cells to-date show a power conversion efficiency of 1.6% under AM 1.5 illumination, with a Voc of 0.704 V and a Jsc of 4.22 mA/cm2.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 36 , Issue 3 , December 2006 , pp. 231 - 234
Copyright
© EDP Sciences, 2006

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References

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