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Two Novel Carbazole Dyes for Dye-Sensitized Solar Cells with Open-Circuit Voltages up to 1 V Based on Br-/Br-3(-) Electrolytes
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2009 (English)In: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 11, no 23, 5542-5545 p.Article in journal (Refereed) Published
Abstract [en]

Dye-sensitized solar cells (DSCs) based on two novel carbazole dyes (TC301 and TC306) and a Br-/Br-3(-) redox mediator in dried CH3CN solutions as electrolytes yielded a V-oc of 1.156 V and a eta value of 3.68% and a V-oc of 0.939 V and a eta value of 5.22% under simulated AM 1.5, respectively. The dyes TC301 and TC306 have more positive HOMO levels (1.59 and 1.38 V vs NHE) than the redox potential of Br-/Br-3(-)-based electrolytes, which have sufficient driving force to regenerate dyes. Under similar conditions with an I-/I-3(-) instead of a Br-/Br-3(-) redox mediator, DSCs sensitized by the dyes TC301 and TC306 produced a V-oc of 0.696 V and a eta value of 2.36% and a V-oc of 0.621 V and a eta value of 4.10%, respectively.

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2009. Vol. 11, no 23, 5542-5545 p.
URN: urn:nbn:se:kth:diva-18978DOI: 10.1021/ol9022936ISI: 000272038200046ScopusID: 2-s2.0-72449186538OAI: diva2:337025
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-01-24Bibliographically approved

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