期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 12, 期 7, 页码 721-725出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201601741
关键词
3D structure; non-fullerene acceptors; organic solar cells; perylenediimide; power conversion efficiency
资金
- National Basic Research Program of China (Fundamental Studies of Perovskite Solar Cells) [2015CB932200]
- National Natural Science Foundation of China [51373076, 51303080, 61605075, 91433118, 210381]
- Science and Technology Department of Jiangsu Province [BK20130942]
- Special Funds for the Development of Strategic Emerging Industries in Shenzhen [JCYJ20150630145302239]
Derived from perylenediimide (PDI) building blocks, 3D PDI molecules are considered as a type of promising structure to overcome molecular aggregation, thus improving the performance of organic solar cells. Herein, we report a novel PDI-based derivative, SCPDT-PDI4, with four PDI units connected to a unique spiro core. Attributed to this novel molecular design, SCPDT-PDI4 exhibits a rigid 3D structure, in which the aggregation tendency of PDI chromophores could be effectively attenuated. Additionally, strong intramolecular charge transfer and high charge mobility are achieved due to the well-conjugated structure and electron-rich property of SCPDT. Therefore, fullerene-free organic solar cells based on SCPDT-PDI4 and PTB7-Th achieve a remarkable high efficiency of 7.11%. Such an excellent result demonstrates the opportunity of SCPDT to be a promising building block for non-fullerene acceptors.
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