期刊
COMPUTATIONAL AND THEORETICAL CHEMISTRY
卷 1205, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.comptc.2021.113454
关键词
Hole transport materials; Photovoltaic properties; End-capped acceptors; Organic solar cell; Power conversion efficiency
资金
- National Natural Science Foundation of China (NSFC) [21771029]
The efficiency of non-fullerene organic solar cells has been enhanced through designing acceptor molecules with electron-withdrawing groups, resulting in improved optoelectronic properties compared to a reference material.
Non-fullerene organic solar cells (OSCs) deliver the highest efficiency gains overall in reported literature. Efforts are being made to refine efficacies and stabilities of organic solar cells through the designing of acceptor molecules that contain powerful electron-withdrawing groups. Here, we computed four acceptors (Y1-Y4) by end-capped alterations on reference R and optimize photophysical, optoelectronic and photovoltaic properties. Therefore, certain properties such as orientation of FMO's, excitation and binding energy, open-circuit voltage (V-oc), transition density matrix and reorganizational energy of hole and electron are observed in comparison with reference. The calculated molecular structures of Y1 and Y4 show a high red-shift, while that of Y2 and Y3 display slightly blue-shift, along with very fine excitation energies and high charge mobilities. All these molecules (Y1-Y4) and the reference R presents band-gaps as small as 1.5-2.5 eV, and considerable charge transfer potential. This theoretical system shows that end-capped acceptors alteration is quite remarkable to establish desired optoelectronic properties. Thus, Y1-Y4 are suggested to researchers aiming at the potential commercialization of highly efficient solar cells systems.
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