A new D-A-pi-A type organic sensitizer based on substituted dihydroindolo [2,3-b] carbazole and DPP unit with a bulky branched alkyl chain for highly efficient DSCs
2015 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 3, no 7, 3777-3784 p.Article in journal (Refereed) Published
Two new D-A-pi-A configuration metal-free organic sensitizers (T1-T2) based on 5,7-dihexyl-6,12-diphenyl-5,7-dihydroindolo[2,3-b]carbazole and a DPP unit with a bulky branched alkyl chain have been synthesized for dye-sensitized solar cells. Due to a bulky branched alkyl chain being attached to the donor and DPP unit, both compounds obtain high V-oc values. Under standard global AM 1.5 solar light conditions, the T1 based-device gives a high conversion efficiency of 8.24% with a J(sc) of 15.72 mA cm(-2), a V-oc of 0.74 V and a FF of 0.71. These excellent performances make the donor dihydroindolo[2,3-b] carbazole and DPP unit promising candidates for further application in DSCs.
Place, publisher, year, edition, pages
2015. Vol. 3, no 7, 3777-3784 p.
Chemical Sciences Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-161633DOI: 10.1039/c4ta05162aISI: 000349447200066ScopusID: 2-s2.0-84922694613OAI: oai:DiVA.org:kth-161633DiVA: diva2:797629
QC 201503242015-03-242015-03-132015-03-24Bibliographically approved