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Founded in 1887!

Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Ed. by Weitzel, Karl-Michael

12 Issues per year

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The Electronic Role of the TiO2 Light-Scattering Layer in Dye-Sensitized Solar Cells

Zhipan Zhang / Seigo Ito / Brian O'Regan / Daibin Kuang / Shaik Mohammed Zakeeruddin / Paul Liska / Raphaël Charvet / Pascal Comte / Mohammad Khaja Nazeeruddin / Peter Péchy / Robin Humphry-Baker / Tsuguo Koyanagi / Takaki Mizuno / Michael Grätzel

Citation Information: Zeitschrift für Physikalische Chemie. Volume 221, Issue 3, Pages 319–327, ISSN (Print) 0942-9352, DOI: 10.1524/zpch.2007.221.3.319, September 2009

Publication History:
Received:
2006-06-02
Accepted:
2006-09-16
Published Online:
2009-09-25

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 4.5μm thick LSL alone showed a conversion efficiency of 5% despite of being pale pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.

Keywords: Solar-Energy Conversion; Dye Sensitizer Solar Cells; Light Containment; Scattering Layer

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