Change search
ReferencesLink to record
Permanent link

Direct link
Photoinduced ultrafast dynamics of comnarin 343 sensitized p-type-nanostructured NiO films
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
2005 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 109, no 41, 19403-19410 p.Article in journal (Refereed) Published
Abstract [en]

Photoinduced electron transfer from the valence band of nanocrystalline NiO, a p-type semiconductor, to an excited bound dye, coumarin 343, and the subsequent recombination have been measured by femtosecond transient absorbance spectroscopy probing with white light. It was found that both processes are nonexponential. The photoinduced electron transfer from the semiconductor to the excited bound dye has an ultrafast component (similar to 200 fs), which is comparable to the time constants measured for photoinduced electron injection in C343-TiO2 colloid solutions. The process is very efficient and constitutes the main path of deactivation of the excited dye. Back electron transfer is also remarkably fast, with the main part of the recombination process happening with a time constant of similar to 20 ps. Dye-sensitized nanostructured p-type semiconductors are attractive materials due to their potential use as photocathodes in dye-sensitized solar cells and solid electrolytes in solid-state dye-sensitized solar cells. To our knowledge, this is the first time that the photoinduced electron-transfer kinetics of a sensitized p-type semiconductor has been studied.

Place, publisher, year, edition, pages
2005. Vol. 109, no 41, 19403-19410 p.
Keyword [en]
interfacial electron-transfer, pumped dye lasers, solvation dynamics, titanium-dioxide, pulse-radiolysis, coumarin dyes, solar-cell, spectral sensitization, triplet-state, tio2 films
URN: urn:nbn:se:kth:diva-15123DOI: 10.1021/jp053230eISI: 000232612100054ScopusID: 2-s2.0-27544461477OAI: diva2:333164
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Boschloo, GerritHagfeldt, Anders
By organisation
Physical ChemistryOrganic Chemistry
In the same journal
Journal of Physical Chemistry B

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link