期刊
DYES AND PIGMENTS
卷 92, 期 3, 页码 1144-1152出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.07.016
关键词
Benzodifuranone; Organic dyes; Strong acceptors; Time-dependent density functional theory; Dye sensitised solar cells (DSSC); Absorption spectra
资金
- Region des Pays de la Loire
- Fundacion Seneca
- Agencia de Ciencia y Tecnologia de la Region de Murcia
- Fundacion Seneca del Centro de Coordinacion de la Investigacion de la Region de Murcia [08735/PI/ 08]
- Ministerio de Educacion y Ciencia of Spain [CTQ2007-66528, CSD2009-00038]
- CCIPL (Centre de Calcul Intensif des Pays de Loire) [c2011085117]
- ANR HABISOL [ANR-08-HABISOL-002]
Using ab initio theoretical tools simultaneously accounting for electron correlation and environmental effects, we have simulated the optical spectra of benzodifuranone dyes. In a first step, a valuable computational protocol has been defined and it turned out that a PCM-TD-M06-2X/6-311+G(2d,p)//PCM-PBE0/6-311G(d,p) approach provides an adequate balance between computational requirements and accuracy (deviations of ca. 10 nm with respect to experiment). In a second stage, we have calculated the spectrum of a large series of push-pull structures, and it turned out that the benzodifuranone core is a strong electron capturing group at the excited-state. Indeed, strong auxochroms like the nitro and cyano groups fall short to significantly perturb the LUMO of this series of chromogens. Eventually, in a last phase, the implications of these results are discussed for a series of organic dyes of potential interest for solar cells (DSSC). (C) 2011 Elsevier Ltd. All rights reserved.
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