- Title
- Ultrafast Photodynamics of the Indoline Dye D149 Adsorbed to Porous ZnO in Dye-Sensitized Solar Cells
- Creator
- Rohwer, Egmont
- Creator
- Richter, Christoph
- Creator
- Heming, Nadine
- Creator
- Strauch, Kerstin
- Creator
- Litwinski, Christian
- Creator
- Nyokong, Tebello
- Creator
- Schlettwein, Derck
- Creator
- Schwoerer, Heinrich
- Type
- Article
- Identifier
- vital:7326
- Identifier
- http://hdl.handle.net/10962/d1020576
- Description
- We investigate the ultrafast dynamics of the photoinduced electron transfer between surface-adsorbed indoline D149 dye and porous ZnO as used in the working electrodes of dye-sensitized solar cells. Transient absorption spectroscopy was conducted on the dye in solution, on solid state samples and for the latter in contact to a I−/I3− redox electrolyte typical for dye-sensitized solar cells to elucidate the effect of each component in the observed dynamics. D149 in a solution of 1:1 acetonitrile and tert-butyl alcohol shows excited-state lifetimes of 300±50 ps. This signature is severely quenched when D149 is adsorbed to ZnO, with the fastest component of the decay trace measured at 150±20 fs due to the charge-transfer mechanism. Absorption bands of the oxidized dye molecule were investigated to determine regeneration times which are in excess of 1 ns. The addition of the redox electrolyte to the system results in faster regeneration times, of the order of 1 ns.
- Description
- Original publication is available at http://dx.doi.org/10.1002/cphc.201200715
- Format
- 8 p.
- Format
- Publisher
- Wiley
- Language
- English
- Relation
- Rohwer, E., Richter, C., Heming, N., Strauch, K., Litwinski, C., Nyokong, T., Schlettwein, D. & Schwoerer, H. 2013. Ultrafast Photodynamics of the Indoline Dye D149 Adsorbed to Porous ZnO in Dye-Sensitized Solar Cells. ChemPhysChem, 14(1):132–139. Available: http://dx.doi.org/10.1002/cphc.201200715.
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Nyokong, Tebello (Distinguished Professor)