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 Lindqvist
Polymerteknologi
Jonas Bergqvist
Linköpings universitet
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
Linköpings universitet
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- 153301Ämneskategorier
Polymerkemi
Styrkeområden
Nanovetenskap och nanoteknik
Energi
Materialvetenskap
DOI
10.1063/1.4870997