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Influence of molecular weight on the solar cell performance of double-crystalline donor-acceptor block copolymers

Appl. Phys. Lett. 95, 183308 (2009); doi:10.1063/1.3257367

Published 6 November 2009

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Michael Sommer,1 Sven Hüttner,1,2 Ullrich Steiner,2 and Mukundan Thelakkat1
1Applied Functional Polymers and Department of Macromolecular Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany
2Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
We investigate the influence of the molecular weight of double-crystalline donor-acceptor block copolymers comprised of poly(3-hexylthiophene) as donor and poly(perylene bisimide acrylate) as acceptor segments on the device performance of polymer solar cells. Two block copolymers 1 and 2 exhibiting different molecular weights but the same composition are compared. Block copolymer 2 with the higher molecular weight shows an improvement in the hole carrier mobility µOFET of more than two orders of magnitude, and an improvement in the external quantum efficiency of one order of magnitude reaching 31%, which is the highest reported value for a block copolymer system. ©2009 American Institute of Physics
History: Received 7 July 2009; accepted 6 October 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/183308/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.35.Jk
    Copolymers, phase transitions, structure (polymer chemistry)
  • 82.45.Wx
    Polymers and organic materials in electrochemistry
  • 72.20.Fr
    Low-field transport and mobility; piezoresistance (semiconductors/insulators)
  • 72.80.Le
    Electrical conductivity of polymers; organic compounds
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

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