4H-1,2,6-Thiadiazin-4-one-containing small molecule donors and additive effects on their performance in solution-processed organic solar cells
Date
2015Author
Hermerschmidt, F.
Min, J.

Tuladhar, S. M.
Ameri, T.
Faber, H.


Anthopoulos, T. D.
Bradley, D. D. C.
Nelson, J.
Brabec, C. J.

ISSN
2050-7534Source
Journal of Materials Chemistry CVolume
3Issue
10Pages
2358-2365Google Scholar check
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The optical, electrochemical, morphological and transport properties of a series of thiadiazinone (acceptor) and (thienyl)carbazoles (donor) containing π-extended donor-acceptor-donors (D-A-D) are presented. Systematic variations in the number of the thienyl units, the choice of branched or straight alkyl side chains and the use of a processing additive demonstrate their use as electron donors in bulk heterojunction solar cells blended with fullerene acceptors. The best power conversion efficiency (PCE) of 2.7% is achieved by adding to the D-A-D 3:fullerene blend a polydimethylsiloxane (PDMS) additive, that improves the morphology and doubles the hole mobility within the D-A-D:fullerene blend. © The Royal Society of Chemistry.