Neat C60:C70 buckminsterfullerene mixtures enhance polymer solar cell performance
Journal article, 2014

We demonstrate that bulk-heterojunction blends based on neat, unsubstituted buckminsterfullerenes (C60, C70) and a thiophene–quinoxaline copolymer (TQ1) can be readily processed from solution. Atomic force and transmission electron microscopy as well as photoluminescence spectroscopy reveal that thin films with a fine-grained nanostructure can be spin-coated, which display a good photovoltaic performance. Replacement of substituted fullerenes with C60 or C70 only results in a small drop in open-circuit voltage from 0.9 V to about 0.8 V. Thus, a power conversion efficiency of up to 2.9% can be maintained if C70 is used as the acceptor material. Further improvement in photovoltaic performance to 3.6% is achieved, accompanied by a high internal quantum efficiency of 75%, if a 1 : 1 C60:C70 mixture is used as the acceptor material, due to its improved solubility in ortho-dichlorobenzene.

Author

Amaia Diaz de Zerio Mendaza

Chalmers, Chemical and Biological Engineering, Polymer Technology

J. Bergqvist

Linköping University

Olof Bäcke

Chalmers, Applied Physics, Eva Olsson Group

Camilla Lindqvist

Chalmers, Chemical and Biological Engineering, Polymer Technology

Renee Kroon

Chalmers, Chemical and Biological Engineering, Polymer Technology

Feng Gao

Linköping University

Mats Andersson

Chalmers, Chemical and Biological Engineering, Polymer Technology

Eva Olsson

Chalmers, Applied Physics, Eva Olsson Group

Olle Inganäs

Linköping University

Christian Müller

Chalmers, Chemical and Biological Engineering, Polymer Technology

Journal of Materials Chemistry A

20507488 (ISSN) 20507496 (eISSN)

Vol. 2 35 14354-14359

Subject Categories

Polymer Chemistry

Chemical Sciences

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Materials Science

DOI

10.1039/c4ta02515f

More information

Latest update

2/28/2018