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Energy level tuning of organic dyes for fundamental studies of the oxide/dye/electrolyte interface in solar cells
KTH, School of Chemical Science and Engineering (CHE), Centres, Centre of Molecular Devices, CMD.
KTH, School of Chemical Science and Engineering (CHE), Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Centres, Centre of Molecular Devices, CMD.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.ORCID iD: 0000-0003-2673-075X
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(English)Manuscript (Other academic)
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-7883OAI: oai:DiVA.org:kth-7883DiVA: diva2:13042
Note
QC 20101108Available from: 2008-01-09 Created: 2008-01-09 Last updated: 2010-11-08Bibliographically approved
In thesis
1. Synthesis of Organic Chromophores for Dye Sensitized Solar Cells
Open this publication in new window or tab >>Synthesis of Organic Chromophores for Dye Sensitized Solar Cells
2007 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis is divided into four parts with organic chromophores for dye sensitized solar cells as the common feature and an introduction with general concepts of the dye sensitized solar cells.

The first part of the thesis describes the development of an efficient organic chromophore for dye sensitized solar cells. The chromophore consists of a triphenylamine moiety as an electron donor, a conjugated linker with a thiophene moiety and cyanoacrylic acid as an electron acceptor and anchoring group. During this work a strategy to obtain an efficient sensitizer was developed. Alternating the donor, linker or acceptor moieties independently, would give us the tool to tune the HOMO and LUMO energy levels of the chromophores. The following parts of this thesis regard this development strategy.

The second part describes the contributions to the HOMO and LUMO energy levels when alternating the linker moiety. By varying the linker the HOMO and LUMO energy levels was indeed shifted. Unexpected effects of the solar cell performances when increasing the linker length were revealed, however.

The third part describes the investigation of an alternative acceptor group, rhodanine-3-acetic acid, in combination with different linker lengths. The HOMO and LUMO energy level tuning was once again successfully shifted. The poor electronic coupling of the acceptor group to the semiconductor surface proved to be a problem for the overall efficiency of the solar cell, however.

The fourth part describes the contributions from different donor groups to the HOMO and LUMO energy levels and has so far been the most successful in terms of reaching high efficiencies in the solar cell. A top overall efficiency of 7.1 % was achieved.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. 43 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2007:86
Keyword
Organic Chromophores, Dye Sensitized Solar Cells
National Category
Organic Chemistry
Identifiers
urn:nbn:se:kth:diva-4600 (URN)978-91-7178-833-7 (ISBN)
Presentation
2008-01-25, D3, Lindstedtsvägen 5, Stockholm, 13:00
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Note
QC 20101108Available from: 2008-01-09 Created: 2008-01-09 Last updated: 2010-11-08Bibliographically approved

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Brinck, ToreSun, Licheng

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