Binding energy of singlet excitons and charge transfer complexes in MDMO-PPV: PCBM solar cells

被引：33
|
作者：
Kern, Julia [1 ]
Schwab, Sebastian [1 ]
Deibel, Carsten [1 ]
Dyakonov, Vladimir [1 ,2 ]
机构：
[1] Univ Wurzburg, D-97074 Wurzburg, Germany
[2] Bavarian Ctr Appl Energy Res ZAE Bayern, D-97074 Wurzburg, Germany
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2011年 / 5卷 / 10-11期
关键词：
excitons; charge transfer complexes; photoluminescence; organic solar cells; MDMO-PPV; PCBM; DISSOCIATION; POLYMER; PHOTOCONDUCTION; RECOMBINATION; GENERATION; MORPHOLOGY; EFFICIENCY; VINYLENE);
D O I：
10.1002/pssr.201105430
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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
引用
收藏
页码：364 / 366
页数：3
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