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Geometrical and energetical structural changes in organic dyes for dye-sensitized solar cells probed using photoelectron spectroscopy and DFT
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.ORCID-id: 0000-0002-8621-4282
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Rekke forfattare: 142016 (engelsk)Inngår i: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 18, nr 1, s. 252-260Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effects of alkoxy chain length in triarylamine based donor acceptor organic dyes are investigated with respect to the electronic and molecular surface structures on the performance of solar cells and the electron lifetime. The dyes were investigated when adsorbed on TiO2 in a configuration that can be used for dye sensitized solar cells (DSCs). Specifically, the two dyes D35 and D45 were compared using photoelectron spectroscopy (PES) and density functional theory (DFT) calculations. The differences in solar cell characteristics when longer alkoxy chains are introduced in the dye donor unit are attributed to geometrical changes in dye packing while only minor differences were observed in the electronic structure. A higher dye load was observed for D45 on TiO2. However, D35 based solar cells result in higher photocurrent although the dye load is lower. This is explained by different geometrical structures of the dyes on the surface.

sted, utgiver, år, opplag, sider
2016. Vol. 18, nr 1, s. 252-260
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URN: urn:nbn:se:su:diva-127280DOI: 10.1039/c5cp04589dISI: 000368755500027OAI: oai:DiVA.org:su-127280DiVA, id: diva2:943766
Tilgjengelig fra: 2016-06-28 Laget: 2016-03-01 Sist oppdatert: 2019-12-17bibliografisk kontrollert

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