Fullerene mixtures enhance the thermal stability of a non-crystalline polymer solar cell blend
Artikel i vetenskaplig tidskrift, 2014

Printing of polymer:fullerene solar cells at high speed requires annealing at temperatures up to 140 C. However, bulk-heterojunction blends that comprise a non-crystalline donor polymer often suffer from insufficient thermal stability and hence rapidly coarsen upon annealing above the glass transition temperature of the blend. In addition, micrometer-sized fullerene crystals grow, which are detrimental for the solar cell performance. In this manuscript, we present a strategy to limit fullerene crystallization, which is based on the use of fullerene mixtures of the two most common derivatives, PC61BM and PC71BM, as the acceptor material. Blends of this fullerene mixture and a non-crystalline thiophene-quinoxaline copolymer display considerably enhanced thermal stability and largely retain their photovoltaic performance upon annealing at elevated temperatures as high as 170 C.

Författare

Camilla Johansson

Chalmers, Kemi- och bioteknik, Polymerteknologi

J. Bergqvist

Linköpings universitet

Chalmers

Olof Bäcke

Chalmers, Teknisk fysik, Eva Olsson Group

Stefan Gustafsson

Chalmers, Teknisk fysik, Eva Olsson Group

SuMo Biomaterials

Ergang Wang

Chalmers, Kemi- och bioteknik, Polymerteknologi

Eva Olsson

Chalmers, Teknisk fysik, Eva Olsson Group

Olle Inganäs

Linköpings universitet

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Christian Müller

Chalmers, Kemi- och bioteknik, Polymerteknologi

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 104 15 153301- 153301

Ämneskategorier

Polymerkemi

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

DOI

10.1063/1.4870997

Mer information

Senast uppdaterat

2018-09-10