Dresden 2011 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 55: Photovoltaics: mainly Technology and Photon Management

HL 55.10: Talk

Wednesday, March 16, 2011, 17:00–17:15, FOE Anorg

Numerical simulations for the effiency improvement of hybrid dye-microcrystalline silicon pin-solar cells — •Sven Burdorf, Gottfried Heinrich Bauer, and Rudolf Brüggemann — Institut für Physik, Carl von Ossietzky Universität Oldenburg, Germany

Hybrid solar cells consisting of dye sensitizers incorporated in the i-layer of microcrystalline silicon pin solar cell have been proposed and even recently processed [1,2]. The dye sensitizer molecules are embedded in the matrix and enhance the overall absorption of the dye-matrix system due to their high absorption coefficient in the spectral range interesting for photovoltaic applications. However, the charge transport properties of dyes are quite poor. Microcrystalline silicon on the other hand has acceptable charge transport properties, while the absorption, given a layer thickness in the micron range, is relatively poor. This contribution investigates the effiency improvement of hybrid dye-microcrystalline solar cells compared to pure microcrystalline solar cells by simulation. The results indicate that, under optimal conditions, the effiency can be improved by more than 20 % compared to a pure microcrystalline silicon cell. The thickness reduction for the hybrid system can be as large as 50 % for the same effiency. [1] T. Mayer, U. Weiler, C. Kelting, D. Schlettwein, S. Makarov, D. Wöhrle, O. Abdallah, M. Kunst and W. Jaegermann 2007 Solar Energy Materials and Solar Cells 91 1873-1886. [2] T. Mayer, U. Weiler, E. Mankel, W. Jaegermann, C. Kelting, D. Schlettwein, N. Baziakina and D. Wöhrle 2008 Renewable Energy 33 262-266.