Journal article

Publication year: 2013

Pages: 132-139

Journal: ChemPhysChem

Volume number: 14

Issue number: 1

ISSN: 1439-4235

eISSN: 1439-7641

DOI Link: https://doi.org/10.1002/cphc.201200715

Publisher: Wiley

Abstract: 
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.

Harvard Citation style: Rohwer, E., Richter, C., Heming, N., Strauch, K., Litwinski, C., Nyokong, T., et al. (2013) Ultrafast Photodynamics of the Indoline Dye D149 Adsorbed to Porous ZnO in Dye-Sensitized Solar Cells, ChemPhysChem, 14(1), pp. 132-139. https://doi.org/10.1002/cphc.201200715

APA Citation style: 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. https://doi.org/10.1002/cphc.201200715