Published in
Royal Society of Chemistry, Chemical Communications, 93(49), p. 10950, 2013
DOI: 10.1039/c3cc46557h
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High open circuit voltage organic photovoltaic cells fabricated using 9,9 '-bifluorenylidene as a non-fullerene type electron acceptor
Journal article published in 2013 by
Hee Un Kim,
Ji-Hoon Kim,
Hongsuk Suh,
Jeonghun Kwak 
,
Dongwook Kim,
Andrew C. Grimsdale,
Sung Cheol Yoon,
Do-Hoon Hwang
,
Dongwook Kim,
Andrew C. Grimsdale,
Sung Cheol Yoon,
Do-Hoon Hwang
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Abstract
We have found that 9,9'BF can be used as an electron acceptor for P3HT-based OPVs while similar devices using 4,4'BP do not show any photovoltaic effect. This can be related to the respective aromaticity and antiaromaticity of the reduced forms of 9,9'BF or 4,4'BP. The OPV device fabricated using P3HT and 9,9'BF exhibited a PCE of 2.28% with a Voc of 1.07 V, a Jsc of 5.04 mA cm(-2), and a FF of 0.42.