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Novel Donor-π-Acceptor triphenylamine-based dyes were synthesized and characterized with regard to their photophysical and photoelectrochemical properties by introducing the ethynyl-2-thienyl moiety as spacer (YS-1). The modification of the donor triphenylamine, performed by intodroducing two p-methoxy groups gave the YS-2 dye. Experimental results showed that the UV-Vis absorption spectra changed exhibiting the increasing of the molar extinction coefficient as well as the red-shift in dichloromethane solution. The maximum power conversion efficiency under standard global AM 1.5 illumination for YS-1 was 4.1% rising to 5.3% when the cell was sensitized with YS-2. The interpretation of the improvement and the discussion of the experimental results were corroborated by Time-Dependent Density-Functional Theory calculations, carried out for the photosensitizers in vacuo and in solution. In particular …
Bentham Science Publishers
Publication date: 
1 Oct 2011

Angela Scrascia, Mariachiara Pastore, Lunxiang Yin, Rosaria Anna Picca, Michele Manca, Ying-Cen Guo, Filippo De Angelis, Fabio Della Sala, Roberto Cingolani, Giuseppe Gigli, Giuseppe Ciccarella

Biblio References: 
Volume: 15 Issue: 19 Pages: 3535-3543
Current Organic Chemistry