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
20m
Oral Presentation Track C - Photonics Photonics

Speaker

Mr Egmont Rohwer (Stellenbosch University)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

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.

Main supervisor (name and email)<br>and his / her institution

Prof. Heinrich Schwoerer

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Primary author

Mr Egmont Rohwer (Stellenbosch University)

Co-authors

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 (.)

Presentation Materials

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