期刊
ADVANCED FUNCTIONAL MATERIALS
卷 19, 期 22, 页码 3662-3668出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200901398
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资金
- DFG
- BMBF
- German Excellence Initiative
Here, it is shown how carrier recombination through charge transfer excitons between conjugated polymers and fullerene, molecules is mainly controlled by the intrachain conformation of the polymer, and to a limited extent. by the mesoscopic morphology of the blend. This experimental result is obtained by combining near-infrared photoluminescence spectroscopy and transmission electron microscopy, which are sensitive to charge transfer exciton emission and morphology, respectively. The photoluminescence intensity of the charge transfer exciton is correlated to the degree of intrachain order of the polymer, highlighting an important aspect for understanding and limiting carrier recombination in organic photovoltaics.
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