Tailoring intra-molecular coupling in BDT-based copolymers to enhance their performance in fullerene-free organic solar cells

Author:

Tegegne Newayemedhin A.12ORCID,Negash Asfaw3,Yilma Desalegn4,Gebremariam Kidan G.1,Genene Zewdneh5,Mammo Wendimagegn4,Goosen Neill J.2

Affiliation:

1. Department of Physics, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia

2. Department of Chemical Engineering, Stellenbosch University, Stellenbosch 7604, South Africa

3. Department of Chemistry, Debre Berhan University, P.O. Box 405, Debre Berhan, Ethiopia

4. Department of Chemistry, Addis Ababa University, P.O. Box 33658, Addis Ababa, Ethiopia

5. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE412 96, Gothenburg, Sweden

Abstract

By systematically adding acceptors and π-spacers, the structure of a BDT-based copolymer could be tailored to improve their performance in non-fullerene based organic solar cells. A planar geometry increases the complementarity of the copolymer with ITIC, resulting in an efficiency of more than 8%.

Funder

Uppsala Universitet

Publisher

Royal Society of Chemistry (RSC)

Subject

General Materials Science,Chemistry (miscellaneous)

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