Exciton Binding Energies in Organic Photovoltaic Materials: A Theoretical Perspective
Exciton Binding Energies in Organic Photovoltaic Materials: A Theoretical Perspective
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有机光伏材料中的激子结合能:理论视角
DOI:
10.1021/acs.jpcc.1c08898
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发表时间:
2021-12
影响因子:
3.7
通讯作者:
Yuanping Yi
中科院分区:
文献类型:
--
作者:
Lingyun Zhu;Zhixiang Wei;Yuanping Yi
Exciton binding energy (Eb) plays an essential role in organic electronics. For organic solar cells, the existence ofEbnecessitates interfacial energy level offsets to drive exciton dissociation into free charge carriers at the donor/acceptor interfaces, which results in an extra energy loss with respect to inorganic and perovskite solar cells. Thus, it is highly desirable to reduce theEbfor improving the performance of organic photovoltaics. In this perspective, we summarize our recent advances on theoretical studies of theEbin A–D–A small-molecule acceptors for organic photovoltaics. We highlight the importance of the polarization effect on decreasing theEbby stabilizing charge carriers. Moreover, the polarization energies of charge carriers are found to be greatly influenced by different molecular packing structures. Remarkably, an extremely weakEbis achieved in the state-of-the-art A–D–A acceptor of Y6 with a three-dimensional compact molecular packing, thus enabling direct photogeneration of free charge carriers even without the assistance of the donor/acceptor interfaces. We hope this perspective would be helpful to decrease theEband energy loss for high-efficiency organic solar cells.
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影响因子:
3.7
作者:
Zhu Lingyun;Yi Yuanping;Wei Zhixiang
通讯作者:
Wei Zhixiang
DOI:
10.1088/0953-8984/21/33/333102
发表时间:
2009-08-19
期刊:
Journal of physics. Condensed matter : an Institute of Physics journal
影响因子:
--
作者:
Cieplak P;Dupradeau FY;Duan Y;Wang J
通讯作者:
Wang J
影响因子:
3.7
作者:
Kraner, Stefan;Prampolini, Giacomo;Cuniberti, Gianaurelio
通讯作者:
Cuniberti, Gianaurelio
影响因子:
15
作者:
Norton, Joseph E.;Bredas, Jean-Luc
通讯作者:
Bredas, Jean-Luc
影响因子:
35
作者:
Lin, Qianqian;Armin, Ardalan;Meredith, Paul
通讯作者:
Meredith, Paul