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Publication
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Dye-sensitized solar cells (DSCs) based on two novel carbazole dyes and a Br-/Br3- redox mediator in dry CH3CN solns. as electrolytes yielded a Voc of 1.156 V and a η value of 3.68% and a Voc of 0.939 V and a η value of 5.22% under simulated AM 1.5, resp. The dyes have more pos. HOMO levels (1.59 and 1.38 V vs NHE) than the redox potential of Br-/Br3--based electrolytes, which have sufficient driving force to regenerate dyes. Under similar conditions with an I-/I3- instead of a Br-/Br3- redox mediator, DSCs sensitized by the dyes produced a Voc of 0.696 V and a η value of 2.36% and a Voc of 0.621 V and a η value of 4.10%, resp.
Shaik Mohammed Zakeeruddin, Jacques-Edouard Moser, Nikolaos Vlachopoulos, Ulf Anders Hagfeldt, Heewon Bahng, Natalie Flores Diaz
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