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Hybrid solar cells based on thin-film silicon and P3HT

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 nanostructured 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.
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Contributor : Pierre-Jean Alet Connect in order to contact the contributor
Submitted on : Friday, July 25, 2008 - 5:35:57 PM
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Pierre-Jean Alet, Serge Palacin, Pere Roca I Cabarrocas, Billel Kalache, Muriel Firon, et al.. Hybrid solar cells based on thin-film silicon and P3HT. European Physical Journal: Applied Physics, EDP Sciences, 2007, 36, pp.231. ⟨10.1051/epjap:2006145⟩. ⟨cea-00301919⟩



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