载流子
光电流
重组
俘获
材料科学
光电导性
富勒烯
电荷(物理)
化学物理
分子物理学
化学
光电子学
物理
生物化学
量子力学
生物
基因
生态学
有机化学
作者
Alexander Foertig,Andreas Baumann,Daniel Rauh,Vladimir Dyakonov,Carsten Deibel
摘要
We performed temperature dependent transient photovoltage and photocurrent measurements on poly(3-hexylthiophene):[6,6]-phenyl-C61 butyric acid methyl ester bulk heterojuction solar cells. We found a strongly charge carrier concentration and temperature dependent Langevin recombination prefactor. The observed recombination mechanism is discussed in terms of bimolecular recombination. The experimental results were compared with charge carrier extraction by linearly increasing voltage measurements done on the same blend system. We explain the charge carrier dynamics, following an apparent order larger than two, by dynamic trapping of charges in the tail states of the Gaussian density of states.
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