8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

Ultrafast photodynamics of charge transfer reactions in Indoline-sensitized ZnO solar cells

9 Jul 2013, 15:40
Oral Presentation Track C - Photonics Photonics


Mr Egmont Rohwer (Stellenbosch University)

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Prof. Heinrich Schwoerer

Abstract content <br> &nbsp; (Max 300 words)

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.

Primary author

Mr Egmont Rohwer (Stellenbosch University)


Dr Christian Litwinski (.) Mr Christoph Richter (.) Prof. Derck Schlettwein (.) Ms Gabriele Tauscher (Stellenbosch University) Prof. Heinrich Schwoerer (Stellenbosch University) Ms Iulia Minda (Stellenbosch University) Prof. Tebello Nyokong (.)

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