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Optical and Electrical Modeling of Three Dimensional Dye Sensitized Solar Cells

P. Guo[1]
[1]Northwestern University, Evanston, IL, USA

Dye sensitized solar cells (DSSCs) have received tremendous attention as alternative photon harvesting devices. While the sintered TiO2 nanoparticle network attached with dye molecules achieves efficient photon absorption, the electrons have to diffuse through the long TiO2 network to reach the contact, resulting in a high electron density and thus increased recombination. Extensive research efforts have focused on the development of three-dimensional DSSCs. In this work, we used COMSOL Multiphysics® to simulate the photon absorption and photo-generated electron diffusion within the DSSCs. The underlying physics of the DSSC, such as the absorption profile, electron density and recombination rate can be simultaneously extracted from the simulation results, which provides the design guidelines for high efficiency DSSC.