In:
Chinese Journal of Chemical Physics, AIP Publishing, Vol. 29, No. 3 ( 2016-06-27), p. 389-394
Kurzfassung:
We detect a relaxation process of excited SQ02 dye in the chlorobenzene solution and anchor SQ02 on Al2O3 and TiO2 film, so as to investigate the photophysical properties of pristine SQ02 in the monodisperse system, aggregation state, and the corresponding interfacial electron transfer process. The experimental data show that the lifetime of SQ02 in the monondisperse system is ∼2.0 ns, but that of SQ02 anchored on the Al2O3 film could obviously decrease to ∼21 ps. The time of electron transfer from excited SQ02 to TiO2 film is estimated to be ∼2.6 ps and the yield of electron injection is estimated to be ∼89.1%, which matches the incident photon to current efficiency of dye-sensitized solar cell based on SQ02. In addition, some dyes are found to pack on the other dyes anchored on the nanocrystal film, and their relaxation time could reach ∼60 ps. They couldn't participate in the interfacial electron transfer, since they are far away from the TiO2 interface.
Materialart:
Online-Ressource
ISSN:
1674-0068
,
2327-2244
DOI:
10.1063/1674-0068/29/cjcp1512251
Sprache:
Englisch
Verlag:
AIP Publishing
Publikationsdatum:
2016
ZDB Id:
2381472-X
SSG:
6,25