Neat C60:C70 buckminsterfullerene mixtures enhance polymer solar cell performance
Artikel i vetenskaplig tidskrift, 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.

Författare

Amaia Diaz de Zerio Mendaza

Chalmers, Kemi- och bioteknik, Polymerteknologi

J. Bergqvist

Linköpings universitet

Olof Bäcke

Chalmers, Teknisk fysik, Eva Olsson Group

Camilla Lindqvist

Chalmers, Kemi- och bioteknik, Polymerteknologi

Renee Kroon

Chalmers, Kemi- och bioteknik, Polymerteknologi

Feng Gao

Linköpings universitet

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Eva Olsson

Chalmers, Teknisk fysik, Eva Olsson Group

Olle Inganäs

Linköpings universitet

Christian Müller

Chalmers, Kemi- och bioteknik, Polymerteknologi

Journal of Materials Chemistry A

2050-7488 (ISSN)

Vol. 2 14354-14359

Ämneskategorier

Polymerkemi

Kemi

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

DOI

10.1039/c4ta02515f