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A novel small molecule based on naphtho[1,2-b:5,6-b′]dithiophene benefits both fullerene and non-fullerene solar cells

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Abstract

Small molecule solar cells have made great progress in recent years. Herein, we synthesized a novel small molecule donor NDTR with naphtho[1,2-b:5,6-b′]dithiophene (NDT) units as the building blocks. NDTR exhibited complementary absorption for both fullerene acceptor PC71BM and non-fullerene acceptor IDIC. Meanwhile, NDTR possessed a HOMO energy level of −5.23 eV and a LUMO energy level of −3.50 eV, which matched well with these two kinds of acceptors. When mixed with PC71BM, a high power conversion efficiency (PCE) of 7.75% was obtained, while the NDTR:IDIC system presented a PCE of 6.60%. The results indicated that NDTR was an all-round small molecule donor which can work well in both fullerene and non-fullerene systems.

Graphical abstract: A novel small molecule based on naphtho[1,2-b:5,6-b′]dithiophene benefits both fullerene and non-fullerene solar cells

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Publication details

The article was received on 31 Aug 2017, accepted on 10 Nov 2017 and first published on 13 Nov 2017


Article type: Research Article
DOI: 10.1039/C7QM00397H
Citation: Mater. Chem. Front., 2018, Advance Article
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    A novel small molecule based on naphtho[1,2-b:5,6-b′]dithiophene benefits both fullerene and non-fullerene solar cells

    H. Li, J. Fang, J. Zhang, R. Zhou, Q. Wu, D. Deng, M. Abdullah Adil, K. Lu, X. Guo and Z. Wei, Mater. Chem. Front., 2018, Advance Article , DOI: 10.1039/C7QM00397H

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