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Issue 75, 2015
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New organic dyes with high IPCE values containing two triphenylamine units as co-donors for efficient dye-sensitized solar cells

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Abstract

Here we report the synthetic routes as well as the structural and electronic properties of five new triphenylamine-based organic dyes and their application in dye-sensitized solar cells. In the designed dyes, two triphenylamine groups act as the electron donor units and the electron acceptor is a cyanoacrylic acid, and these units are linked by different π-conjugated spacers including thiophene, dioctylfluorene, ethylcarbazole, and benzo-dithiophene. Density functional theory was employed to study the electron distribution and the intramolecular charge transfer (HOMO–LUMO) of the dyes. Extending the π-conjugation of the dyes broaden and red-shift the bands and improves the light-harvesting ability, however, a device made with triphenylamine maximizer-based dye TPAM-1 without a π-conjugated spacer exhibited the best photovoltaic performance with a short-circuit photocurrent density (Jsc) of 11.37 mA cm−2, an open-circuit voltage (Voc) of 0.836 V, and a fill factor (FF) of 0.603, corresponding to an overall power conversion efficiency of 5.67% under AM 1.5 irradiation (100 mW cm−2).

Graphical abstract: New organic dyes with high IPCE values containing two triphenylamine units as co-donors for efficient dye-sensitized solar cells

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Publication details

The article was received on 28 Apr 2015, accepted on 09 Jul 2015 and first published on 09 Jul 2015


Article type: Paper
DOI: 10.1039/C5RA07720F
RSC Adv., 2015,5, 60823-60830

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    New organic dyes with high IPCE values containing two triphenylamine units as co-donors for efficient dye-sensitized solar cells

    C. A. Echeverry, R. Cotta, E. Castro, A. Ortiz, L. Echegoyen and B. Insuasty, RSC Adv., 2015, 5, 60823
    DOI: 10.1039/C5RA07720F

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