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Electronic structure and spectral properties of the triarylamine-dithienosilole dyes for efficient organic solar cells
KTH, Skolan för bioteknologi (BIO).
2012 (engelsk)Inngår i: Dyes and pigments, ISSN 0143-7208, E-ISSN 1873-3743, Vol. 92, nr 1, s. 531-536Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The recently synthesized high-performance triarylamine dyes with the dithienosilole pi-conjugated spacer for efficient organic solar cells are calculated at the density functional theory (DFT) level with the Bader approach for the quantum theory of atoms in molecule (QTAIM) analysis. The presence of stabilizing intramolecular hydrogen bonds and Van der Waals interactions in the dye molecules is predicted and the energies of these interactions are estimated. The electronic bands nature in absorption spectra of the dyes is determined by the time-dependent DFT calculations with a linear response methodology using B3LYP and BMK hybrid functionals. Relations between incident light absorption intensity in the first long-wavelength band of the dye, its polarization, HOMO-LUMO orbital nature and the driving force of electron injection to the semiconductor are discussed. (C) 2011 Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
2012. Vol. 92, nr 1, s. 531-536
Emneord [en]
Triarylamine-dithienosilole dyes, Density functional theory, Bader analysis, Cremer-Kraka energy density, Electric dipole transition moment, Hydrogen bond
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Identifikatorer
URN: urn:nbn:se:kth:diva-50306DOI: 10.1016/j.dyepig.2011.06.012ISI: 000295952300004Scopus ID: 2-s2.0-84962384560OAI: oai:DiVA.org:kth-50306DiVA, id: diva2:480234
Merknad
Qc 20120119Tilgjengelig fra: 2012-01-19 Laget: 2011-12-05 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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