期刊
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
卷 5, 期 10-11, 页码 364-366出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201105430
关键词
excitons; charge transfer complexes; photoluminescence; organic solar cells; MDMO-PPV; PCBM
资金
- Bundesministerium fur Bildung und Forschung [03SF0356B]
- Deutsche Forschungsgemeinschaft [SPP1355, DE 830/8-1]
- Bavarian Academy of Sciences and Humanities
- Bavarian Ministry of Economic Affairs, Infrastructure, Transport and Technology
The influence of an external electric field on the photoluminescence intensity of singlet excitons and charge transfer complexes is investigated for a poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) diode and a bulk heterojunction of the PPV in combination with [6,6]-phenyl-C-61 butyric acid methylester (PCBM), respectively. The experimental data is related to the dissociation probability derived from the Onsager-Braun model. In this way, a lower limit for the singlet exciton binding energy of MDMO-PPV is determined as (327 +/- 30) meV, whereas a significantly lower value of (203 +/- 18) meV is extracted for the charge transfer complex in a MDMO-PPV: PCBM blend. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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