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A Light Resistant Organic Sensitizer for Solar Cell Applications
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. (Lichemg Sun)
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.ORCID iD: 0000-0002-4521-2870
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
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2009 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 48, 1576-1580 p.Article in journal (Refereed) Published
Abstract [en]

(Figure Presented) Finely tuned: A stable dye-sensitized solar cell that contains a molecularly engineered organic dye has been prepared. The efficiency of the cell remains at 90% after 1000 h of light soaking at 60 °C. The remarkable stability of the cell is also reflected in the open-circuit voltage value (Voc), short-circuit photocurrent-density value (J sc), and the fill factor, which also show barely no decline (see picture).

Place, publisher, year, edition, pages
Weinheim: Wiley-VCH Verlag GmbH & Co. , 2009. Vol. 48, 1576-1580 p.
Keyword [en]
dyes/pigments; electrochemistry; long-term stability; sensitizers; solar cells
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-10536DOI: 10.1002/anie.200804719ISI: 000263642300008Scopus ID: 2-s2.0-60749123439OAI: oai:DiVA.org:kth-10536DiVA: diva2:218897
Note
QC 20100716Available from: 2009-05-25 Created: 2009-05-25 Last updated: 2010-12-06Bibliographically 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.
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

 

This thesis deals with development and synthesis of organic chromophores for dye sensitized solar cells. The chromophores are divided into three components; donor, linker and acceptor.

The development of efficient organic chromophores for dye sensitized solar cells starts off with one new organic chromophore, D5. This 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. 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 contributions to the HOMO and LUMO energy levels were investigated when alternating the linker moiety. Unexpected effects of the solar cell performances when increasing the linker length were revealed, however.

In addition, the effect of an alternative acceptor group, rhodanine-3-acetic acid, in combination with different linker lengths was investigated. The HOMO and LUMO energy level tuning was once again successful. Electron recombination from the semiconductor to the electrolyte is probably the cause of the poor efficiencies obtained for this series of dyes.

Finally, the development of functionalized triphenylamine based donors and the contributions from different substituents to the HOMO and LUMO energy levels and as insulating layers were investigated. This strategy has so far been the most successful in terms of reaching high efficiencies in the solar cell. A top overall efficiency of 7.79 % was achieved.

 

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. 73 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2009:18
Keyword
Acceptor, chromophore, donor, dye sensitized solar cells, HOMO and LUMO energy level tuning, linker, organic dye.
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-10547 (URN)978-91-7415-328-6 (ISBN)
Public defence
2009-08-28, F3, KTH, Lindstedtsvägen 26, Stockholm, 10:00 (English)
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Supervisors
Note
QC 20100716Available from: 2009-06-12 Created: 2009-05-26 Last updated: 2010-07-16Bibliographically approved

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Sun, LichengKarlsson, Karl Martin

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