Dominating recombination mechanisms in organic solar cells based on ZnPc and C60

被引：49
|
作者：
Tress, Wolfgang [1 ,2 ]
Leo, Karl [1 ]
Riede, Moritz [1 ]
机构：
[1] Tech Univ Dresden, Inst Angew Photophys, D-01069 Dresden, Germany
[2] Linkoping Univ, IFM, S-58183 Linkoping, Sweden
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 16期
关键词：
OPEN-CIRCUIT VOLTAGE; NON-GEMINATE RECOMBINATION; CHARGE RECOMBINATION; PHOTOVOLTAIC CELLS; DETERMINANT; DEPENDENCE; TRANSPORT; BLENDS; FILMS;
D O I：
10.1063/1.4802276
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the dominating recombination mechanisms in bulk heterojunction solar cells, using a blend of ZnPc and C-60 as model system. Analyzing the open-circuit voltage (V-oc) as a function of illumination intensity, we find that trap-assisted recombination dominates for low light intensities, whereas at 1 sun, direct/bimolecular recombination becomes important. The recombination parameters are not significantly influenced by the blend mixing ratio and are also valid for injected charges. By changing the hole transport layer, recombination at the contact is separately identified as further mechanism reducing Voc at higher light intensities. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802276]
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页数：5
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