Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Stark spectroscopy has used to study the interface of TiO2/D35 organic dye/cobalt electrolyte in the terms of surface electric fields. Effect of dye coverage, lithium and 4-Tert butylpyridine (4-Tbp) concentration, light intensity, electronic Fermi level inside the TiO2 nanoparticulate film and the presence of cheno deoxycholic acid in the Stark spectra of the dyed films is investigated and explained by the interface properties. It is observed that dye coverage and lithium concentration have an important effect on the Stark effect in the dye sensitized solar cells. Higher dye coverage films show stronger Stark effect and high lithium concentration can strongly screen the magnitude of the surface electric fields and reduce the Stark effect spectra. Kinetic absorption measurements have used for studying the Stark effect dynamics and the results show that the screening of the electric fields in the lower dye coverage films is faster than the high dye coverage films.
Schematic representing the Stark effect in the TiO2/D35 dye/electrolyte interface
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