Transient states and the role of excited state self-quenching of indoline dyes in complete dye-sensitized solar cells

Sobus, Jan, Karolczak, Jerzy, Komar, Dariusz, Anta, Juan A. and Ziołek, Marcin (2015) Transient states and the role of excited state self-quenching of indoline dyes in complete dye-sensitized solar cells. Dyes and Pigments, 113 692-701. doi:10.1016/j.dyepig.2014.10.008


Author Sobus, Jan
Karolczak, Jerzy
Komar, Dariusz
Anta, Juan A.
Ziołek, Marcin
Title Transient states and the role of excited state self-quenching of indoline dyes in complete dye-sensitized solar cells
Journal name Dyes and Pigments   Check publisher's open access policy
ISSN 0143-7208
1873-3743
Publication date 2015-02-01
Sub-type Article (original research)
DOI 10.1016/j.dyepig.2014.10.008
Open Access Status Not yet assessed
Volume 113
Start page 692
End page 701
Total pages 10
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Abstract The photo behaviour of indoline dye D149 on different metal oxide nanoparticles in functioning solar cells is investigated by time-resolved studies in the time range from 100 fs to several ns. The cells are also characterized by standard photovoltaic measurements. The electron injection is found to occur on the time scales from <200 fs to several tens of ps. Locally excited (LE) and charge transfer (CT) excited states of the dye are identified to participate in the electron injection and dye deactivation mechanisms. The dependence of the ultrafast dynamics on the coadsorbent concentration and energy density of the pump pulse indicates the important role of excited state self-quenching. A decrease in the photocurrent of the cells upon aging (very fast for ZnO and slower for TiO2 nanoparticles) is found to be correlated with the transient absorption kinetics, with a probable explanation suggested as electrolyte-induced dye rearrangement and aggregate formation.
Keyword Dye aggregation
Dye sensitized solar cells
Indoline dyes
Titanium dioxide nanoparticles
Ultrafast spectroscopy
Zinc oxide nanoparticles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Created: Fri, 15 Sep 2017, 16:26:50 EST by Jan Sobus on behalf of Learning and Research Services (UQ Library)