5,6-Bis(octyloxy)benzo[c][1,2,5]thiadiazole-Bridged Dyes for Dye-Sensitized Solar Cells with High Open-Circuit Voltage Performance
2013 (English)In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, no 9, 1770-1780 p.Article in journal (Refereed) Published
Three new metal-free dyes with a 5,6-bis(octyloxy) benzo[c][1,2,5] thiadiazole core (DOBT-I-III) have been designed and synthesized for use as DSSCs. Their absorption properties and electrochemical and photovoltaic performances have been investigated systematically. The DSSCs based on DOBT-I-III show high open-circuit voltages (V-oc) of 829, 818, and 784 mV, respectively. Of the three dyes, DOBT-III, which contains a thiophene-bridging linker, exhibits the best photovoltaic performance: a short-circuit photocurrent density (J(sc)) of 12.74 mA cm(-2) and a fill factor (FF) of 0.73, which corresponds to an overall conversion efficiency of 7.29% under standard global AM 1.5 solar conditions.
Place, publisher, year, edition, pages
2013. no 9, 1770-1780 p.
Heterocycles, Dyes/pigments, Electrochemistry, Photovoltaic properties, Solar cells
IdentifiersURN: urn:nbn:se:kth:diva-121124DOI: 10.1002/ejoc.201201424ISI: 000316199300020ScopusID: 2-s2.0-84875038769OAI: oai:DiVA.org:kth-121124DiVA: diva2:616915
QC 201304192013-04-192013-04-192013-04-19Bibliographically approved