4H-1,2,6-Thiadiazin-4-one-containing small molecule donors and additive effects on their performance in solution-processed organic solar cells
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.
Hermerschmidt, Felix,Kalogirou, Andreas S.,Min, Jie,Zissimou, Georgia A.,Tuladhar, Sachetan M.,Ameri, Tayebeh,Faber, Hendrik,Itskos, Grigorios,Choulis, Stelios A.,Anthopoulos, Thomas D.,Bradley, Donal D. C.,Nelson, Jenny,Brabec, Christoph J.,Koutentis, Panayiotis A.
p. 2358 - 2365
(2015/03/18)
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