Origin of the dark-current ideality factor in polymer:fullerene bulk heterojunction solar cells
Origin of the dark-current ideality factor in polymer:fullerene bulk heterojunction solar cells
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DOI：
10.1063/1.3651752
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发表时间：
2011-10
影响因子：
4
通讯作者：
G. A. Wetzelaer;M. Kuik;Martijn Lenes;P. Blom
中科院分区：
文献类型：
--
作者：
G. A. Wetzelaer;M. Kuik;Martijn Lenes;P. Blom
在有机体异质结太阳能电池中，暗电流的理想因子偏离1通常被提出作为陷阱辅助复合存在的证据。我们表明，暗特性的非理想性是由深陷入运输占主导地位的成分的施主：受体混合物中的载流子，而不是一个陷阱辅助复合机制。的开路电压的光强度依赖性证实了陷阱辅助复合的情况下，并表明在调查的聚合物：富勒烯太阳能电池的主导复合机制是双分子。© 2011美国物理研究所。
In organic bulk heterojunction solar cells, a deviation of the ideality factor of the dark current from unity is commonly put forward as evidence for the presence of trap-assisted recombination. We demonstrate that the non-ideality of the dark characteristics is determined by deeply trapped carriers in the transport-dominating constituent of the donor:acceptor blend, rather than a trap-assisted recombination mechanism. The light-intensity dependence of the open-circuit voltage confirms the absence of trap-assisted recombination and demonstrates that the dominant recombination mechanism in the investigated polymer:fullerene solar cells is bimolecular. © 2011 American Institute of Physics.