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Issue 25, 2013
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Tracing charge transfer states in polymer:fullerene bulk-heterojunctions

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Abstract

Charge transfer state emission in organic bulk-heterojunctions has been demonstrated to be an important loss mechanism for this reason a better understanding of the nature and origin of the charge transfer state is fundamental for the improvement of organic solar cells. Here, the relationship between photophysical and morphological features of a prototypical organic bulk-heterojunction is investigated in blends with different donor–acceptor ratios. By correlating imaging with photoluminescence spectra measured in different areas of the blends, the charge transfer state emission is unambiguously assigned to microscopical regions in which the intermixing of the two organic semiconductors is higher.

Graphical abstract: Tracing charge transfer states in polymer:fullerene bulk-heterojunctions

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Article information


Submitted
10 Mar 2013
Accepted
25 Apr 2013
First published
26 Apr 2013

J. Mater. Chem. A, 2013,1, 7321-7325
Article type
Paper

Tracing charge transfer states in polymer:fullerene bulk-heterojunctions

M. Manca, C. Piliego, E. Wang, M. R. Andersson, A. Mura and M. A. Loi, J. Mater. Chem. A, 2013, 1, 7321
DOI: 10.1039/C3TA11005B

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