New D-D-π-A triphenylamine-coumarin sensitizers for dye-sensitized solar cells

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
Ji HeLiang Han

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 JSCcompared 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.

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Citations

May 18, 2018·Chemistry : a European Journal·Federico BellaClaudio Gerbaldi
Jun 20, 2020·Physical Chemistry Chemical Physics : PCCP·Nithiya Nirmalananthan-BudauUte Resch-Genger
Apr 16, 2021·Environmental Science and Pollution Research International·Mary Rosana Nalzala ThomasVijayalakshmi Jayakumar
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·João SarratoPaula S Branco

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