Journal
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volume 221, Issue 3, Pages 319-327Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/zpch.2007.221.3.319
Keywords
solar-energy conversion; dye sensitizer solar cells; light containment; scattering layer
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Dye-sensitized solar cells have been fabricated with different kinds of TiO2 films including SiO2 coated and bare TiO2 microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 mu m thick LSL alone showed a conversion efficiency of 5% despite of being pate pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.
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