Asbury, John B. ; Wang, Yong-Qiang ; Hao, Encai ; Ghosh, Hirendra N. ; Lian, Tianquan (2001) Evidences of hot excited state electron injection from sensitizer molecules to TiO2 nanocrystalline thin films Research on Chemical Intermediates, 27 (4). pp. 393-406. ISSN 0922-6168
Full text not available from this repository.
Official URL: http://link.springer.com/article/10.1163%2F1568567...
Related URL: http://dx.doi.org/10.1163/156856701104202255
Abstract
Electron injection dynamics in dye sensitized TiO2 nanocrystalline thin films are studied with femtosecond mid-infrared spectroscopy. Three classes of sensitizer molecules, Ru(dcbpy)2(X)2 (X2 = 2SCN, 2CN, and dcbpy), Fe(dcbpy)2(CN)2, and ReCl(CO)3(dcbpy), are used to examine the dependence of injection rate and yield on the excited state redox potentials. We observed that electron injection occurred on the <100 fs time-scale and injection quantum yield depended on the redox potential for the series of Ru dyes. These results suggest that electron injection to TiO2 competes with electronic and vibrational relaxation within the sensitizer excited states and the branching ratio between these two processes determines the injection quantum yield for sensitizer molecules with an excited state redox potential below the conduction band-edge.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| ID Code: | 101631 |
| Deposited On: | 01 Feb 2017 11:58 |
| Last Modified: | 01 Feb 2017 11:58 |
Repository Staff Only: item control page
