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Comparative Studies on Rigid pi Linker-Based Organic Dyes: Structure-Property Relationships and Photovoltaic Performance
Nanyang Technol Univ, Energy Res Inst NTU ERI N, Sch Mat Sci & Engn, Singapore 637553, Singapore.
Nanyang Technol Univ, Energy Res Inst NTU ERI N, Sch Mat Sci & Engn, Singapore 637553, Singapore.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Nanyang Technol Univ, Energy Res Inst NTU ERI N, Sch Mat Sci & Engn, Singapore 637553, Singapore.
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2014 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 7, no 12, 3396-3406 p.Article in journal (Refereed) Published
Abstract [en]

A series of six structurally correlated donor-pi bridge-acceptor organic dyes were designed, synthesized, and applied as sensitizers in dye-sensitized solar cells. Using the most widely studied donor (triarylamine) and cyclopenta[1,2-b:5,4-b’]dithiophene or cyclopenta[1,2-b: 5,4-b’] dithiophene[2’,1’:4,5]thieno[2,3-d] thiophene as pi spacers, their structure-property relationships were investigated in depth by photophysical techniques and theoretical calculations. It was found that the photovoltaic performance of these dyes largely depends on their electronic structures, which requires synergistic interaction between donors and acceptors. Increasing the electron richness of the donor or the elongation of pi-conjugated bridges does not necessarily lead to higher performance. Rather, it is essential to rationally design the dyes by balancing their light-harvesting capability with achieving suitable energy levels to guarantee unimpeded charge separation and transport.

Place, publisher, year, edition, pages
2014. Vol. 7, no 12, 3396-3406 p.
Keyword [en]
cyclic voltammetry; density functional calculations; dyes/pigments; electrochemistry; solar cells
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-241009DOI: 10.1002/cssc.201402651ISI: 000345976200029PubMedID: 25319943OAI: oai:DiVA.org:uu-241009DiVA: diva2:777433
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2017-12-05Bibliographically approved

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Hao, YanHagfeldt, Anders

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