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Complementary co-sensitization of an aggregating squaraine dye in solid-state dye-sensitized solar cells

Title data

Gräf, Katja ; Rahim, Moochikkadavath A. ; Das, Suresh ; Thelakkat, Mukundan:
Complementary co-sensitization of an aggregating squaraine dye in solid-state dye-sensitized solar cells.
In: Dyes and Pigments. Vol. 99 (2013) Issue 3 . - pp. 1101-1106.
ISSN 0143-7208
DOI: https://doi.org/10.1016/j.dyepig.2013.08.003

Project information

Project financing: Andere

Abstract in another language

In this study, we used the co-sensitization approach to reach panchromatic light absorption in solid-state dye-sensitized solar cells (SDSCs). We combined two complementary absorbing organic sensitizers, viz. a blue-absorbing triphenyldiamine dye (TPD-dye) and a red-absorbing squaraine dye (SQ-dye). The aggregation behaviour of SQ-dye was entirely investigated by steady-state UV/vis spectroscopy. The formation of H- and J-aggregates was observed in both solution and the chemisorbed state on mesoporous TiO2. On applying SQ-dye and TPD-dye in single-dye and co-sensitized SDSCs, the external quantum efficiency studies clearly indicate that TPD-dye, as well as the monomer species and the H- and J- aggregates of SQ-dye contribute to the current generation. We optimized the performance of the co-sensitized SDSCs regarding the solvent used for the chemisorption, the chemisorption time, and the thickness of the mesoporous TiO2 layer. The best result was obtained for a co-sensitized SDSC after chemisorption for 3 h from a tert-butanol/acetonitrile 1:1 solution using a 1.4 μm thick mesoporous TiO2 layer.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Profile Fields
Profile Fields > Emerging Fields
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions
Research Institutions > EU Research Projects
Research Institutions > EU Research Projects > LARGECELLS - Large-area Organic and Hybrid Solar Cells
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers > Professorship Applied Functional Polymers - Univ.-Prof. Dr. Mukundan Thelakkat
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 12 Apr 2016 08:10
Last Modified: 21 Jul 2016 07:12
URI: https://eref.uni-bayreuth.de/id/eprint/1155