Issue 1, 2018

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
31 août 2017
Accepted
10 nov. 2017
First published
13 nov. 2017

Mater. Chem. Front., 2018,2, 143-148

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, 2, 143 DOI: 10.1039/C7QM00397H

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