Issue 27, 2015

A 1,8-naphthalimide based small molecular acceptor for polymer solar cells with high open circuit voltage

Abstract

A novel small molecule NI-T-NI with a thiophene core and two 1,8-naphthalimide terminal groups was synthesized via direct C–H activation and used as the acceptor for polymer solar cells. NI-T-NI exhibits a good crystallinity and can form H-aggregates in the solid state. NI-T-NI has a rather high-lying LUMO level, which is beneficial for achieving a high Voc. In cooperation with a high-lying LUMO level polymer PCDTBT-C12, a PCE of 2.01% with a high Voc of 1.30 V has been achieved. As far as we know, a Voc of 1.30 V is the highest value reported for single junction organic solar cells. Our results have demonstrated that 1,8-naphthalimide could be a useful building block for the synthesis of promising acceptor materials for polymer solar cells.

Graphical abstract: A 1,8-naphthalimide based small molecular acceptor for polymer solar cells with high open circuit voltage

Supplementary files

Article information

Article type
Paper
Submitted
23 Apr 2015
Accepted
25 May 2015
First published
26 May 2015

J. Mater. Chem. C, 2015,3, 6979-6985

A 1,8-naphthalimide based small molecular acceptor for polymer solar cells with high open circuit voltage

X. Zhang, J. Zhang, H. Lu, J. Wu, G. Li, C. Li, S. Li and Z. Bo, J. Mater. Chem. C, 2015, 3, 6979 DOI: 10.1039/C5TC01148E

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