The effective charge collection in dye-sensitized solar cells (DSCs) is an important factor to improve the efficiency. Here, we report the comparison of three types of structures in DSCs. One type of structure is a sandwich-type DSC (SW-DSC), in which the TiO2 film is sandwiched between a TCO glass front electron-collection electrode and a sputtered Ti back collection electrode. The second is a normal DSC (N-DSC), which has no back electrode. The third is a back-contact-type DSC (BC-DSC), in which a sputtered Ti back electrode is deposited on a TiO2 film on the opposite side of the normal glass as an optical window. The photocurrent response of an SW-DSC is the fastest of the three structures due to using intensity modulated photocurrent spectroscopy, which can be explained by the electron diffusion model. The model shows that the SW-DSC is a favorable structure for effective charge collection in DSCs.
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Charge collection, Dye-sensitized solar cells, Electron transport, Nanocrystalline
Yanagida, Masatoshi, Youhei Numata, Keiichi Yoshimatsu, Shin Satoh, and Liyuan Han. "Effective charge collection in dye-sensitized nanocrystalline TiO2." Advances in Natural Sciences: Nanoscience and Nanotechnology 4, no. 1 (2013): 015006.
Advances in Natural Sciences: Nanoscience and Nanotechnology