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Adv Mater. 2017 Feb;29(6). doi: 10.1002/adma.201604251. Epub 2016 Dec 1.

Alkyl Side-Chain Engineering in Wide-Bandgap Copolymers Leading to Power Conversion Efficiencies over 10.

Author information

1
Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
2
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
3
The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
4
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
5
Department of Chemistry, Institute for Materials Design, Hanyang University, Seoul, 133-791, South Korea.
6
Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.

Abstract

A series of wide-bandgap (WBG) copolymers with different alkyl side chains are synthesized. Among them, copolymer PBT1-EH with moderatly bulky side chains on the acceptor unit shows the best photovoltaic performance with power conversion efficiency over 10%. The results suggest that the alkyl side-chain engineering is an effective strategy to further tuning the optoelectronic properties of WBG copolymers.

KEYWORDS:

alkyl side chain; efficiency; organic solar cells; wide-bandgap copolymers

PMID:
27906476
DOI:
10.1002/adma.201604251

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