Dissociation of charge transfer excitons at the donor–acceptor interface in bulk heterojunction organic solar cells

被引：0
|
作者：
Jai Singh
Monishka Narayan
David Ompong
Furong Zhu
机构：
[1] Charles Darwin University,School of Engineering and Information Technology
[2] Hong Kong Baptist University,Department of Physics, Institute of Advanced Materials and Institute of Research and Continuing Education (Shenzhen)
来源：
Journal of Materials Science: Materials in Electronics | 2017年 / 28卷
关键词：
High Occupied Molecular Orbital; Lower Unoccupied Molecular Orbital; Power Conversion Efficiency; Organic Solar Cell; Lower Unoccupied Molecular Orbital Energy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
It is emphasized that the formation of charge transfer (CT) excitons in bulk heterojunction (BHJ) organic solar cells (OSCs) does not automatically lead to the dissociation of excitons and generation of charge carriers due to the built-in electric field created by the difference in the work functions of the electrodes. Like Frenkel excitons, CT excitons are also charge neutral excited entities and cannot be efficiently dissociated by such electric field. A condition of the dissociation of CT excitons is proposed and used to derive the rates of exciton dissociation in BHJ OSCs. Results are calculated and compared with experiments for the BHJ OSC of PTB7: PC71BM and found to agree very well qualitatively.
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页码：7095 / 7099
页数：4
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