8-12 July 2013
Africa/Johannesburg timezone
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Ultrafast photodynamics of charge transfer reactions in Indoline-sensitized ZnO solar cells

Presented by Mr. Egmont ROHWER on 9 Jul 2013 from 15:40 to 16:00
Type: Oral Presentation
Session: Photonics
Track: Track C - Photonics

Abstract

The surprising efficiency of some dye-sensitized solar cells is largely attributed to the ultrafast efficient electron injection from the photo-excited state of the dye to the conduction band of the semiconductor. Femtosecond transient absorption spectroscopy measurements conducted on indoline-sensitized ZnO solar cells reveal this combination to be no exception. Primary charge transfer occurs on the 100 fs time scale. The measurements also reveal the rates of competing decay mechanisms and the regeneration rate of dye molecules after oxidation. The effect of different redox couples on the operation of the cell and the effect of an external potential, as under working conditions, on the primary charge transfer is discussed.

Award

Yes

Level

PhD

Supervisor

Prof. Heinrich Schwoerer

Paper

No

Place

Location: A1-11


Primary authors

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