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Issue 7, 2017
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New D–D–π-A triphenylamine–coumarin sensitizers for dye-sensitized solar cells

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Abstract

Three D–D–π-A triphenylamine–coumarin sensitizers were designed and synthesized with a triphenylamine and coumarin double donor and a cyanoacrylic acid acceptor. Thiophene, bithiophene and phenylthiophene were used as π-bridges, respectively, and the effects of different π-bridges on the photophysical properties and photovoltaic performance were investigated. With the incorporation of an additional thiophene unit, the bithiophene π-bridge contributes to better light absorption and hence superior JSC compared with the thiophene π-bridge. Although the dye with phenylthiophene π-bridge exhibits an inferior absorption spectrum to that with the thiophene π-bridge, it gives a photoelectrical conversion efficiency of 4.99% and exhibits the best photovoltaic performance of the three sensitizers, ascribed to its efficient photon-to-current conversion efficiency, slow charge recombination rate and good electron injection efficiency.

Graphical abstract: New D–D–π-A triphenylamine–coumarin sensitizers for dye-sensitized solar cells

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Publication details

The article was received on 15 Nov 2016, accepted on 24 Apr 2017 and first published on 25 Apr 2017


Article type: Paper
DOI: 10.1039/C6PP00410E
Citation: Photochem. Photobiol. Sci., 2017,16, 1049-1056
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    New D–D–π-A triphenylamine–coumarin sensitizers for dye-sensitized solar cells

    J. He, Y. Liu, J. Gao and L. Han, Photochem. Photobiol. Sci., 2017, 16, 1049
    DOI: 10.1039/C6PP00410E

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