Enhance performance of organic solar cells based on an isoindigo-based copolymer by balancing absorption and miscibility of electron acceptor
Journal article, 2011

Superior absorption of PC(71)BM in visible region to that of PC(61)BM makes PC(71)BM a predominant acceptor for most high efficient polymer solar cells (PSCs). However, we will demonstrate that power conversion efficiencies (PCEs) of PSCs based on poly[N,N'-bis(2-hexyldecyl)isoindigo-6, 6'-diyl-alt-thiophene-2,5-diyl] (PTI-1) with PC(61)BM as acceptor are 50% higher than their PC71BM counterparts under illumination of AM1.5G. AFM images reveal different topographies of the blends between PTI-1:PC(61)BM and PTI-1:PC(71)BM, which suggests that acceptor's miscibility plays a more important role than absorption. The photocurrent of 9.1 mA/cm(2) is among the highest value in PSCs with a driving force for exciton dissociation less than 0.2 eV.


polymer blends





solar cells


Z. F. Ma

Linköping University

Ergang Wang

Chalmers, Chemical and Biological Engineering, Polymer Technology

K. Vandewal

Linköping University

Mats Andersson

Chalmers, Chemical and Biological Engineering, Polymer Technology

Fengling Zhang

Linköping University

Applied Physics Letters

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

Vol. 99 14 143302

Subject Categories

Physical Sciences



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