中国科学院重庆绿色智能技术研究院机构知识库

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	Improving Molecular Planarity by Changing Alky Chain Position Enables 12.3% Efficiency All-Small-Molecule Organic Solar Cells with Enhanced Carrier Lifetime and Reduced Recombination
	Dong, Xiyue1,2; Yang, Ke1,3; Tang, Hua1,2; Hu, Dingqin1; Chen, Shanshan3,4; Zhang, Jun1; Kan, Zhipeng1; Duan, Tainan1; Hu, Chao1; Dai, Xuexin5
	2019-10-01
摘要	Molecular stacking plays an important role in defining the active layer morphology in all-small-molecule organic solar cells (ASM OSCs). However, the precise control of donor/acceptor stacking to afford optimal phase separation remains challenging. Herein, the molecular stacking of a small-molecule donor is tuned by changing the alky chain position to match a high-performance small-molecule nonfullerene acceptor (NFA), Y6. The alky chain engineering not only affects the planarity of the small-molecule donor, but also the molecular aggregation and the active layer morphology, and thus the photovoltaic performance. Notably, single-junction ASM OSCs with 12.3% power conversion efficiency (PCE) are achieved. The PCE of 12.3% is among the top efficiencies of single-junction ASM OSCs reported in the literature to date. The results highlight the importance of fine-tuning the molecular structure to achieve high-performance ASM OSCs.
关键词	molecular engineering molecular planarity morphology organic solar cells small molecules
DOI	10.1002/solr.201900326
发表期刊	SOLAR RRL
ISSN	2367-198X
页码	10
收录类别	SCI
WOS记录号	WOS:000491193800001
语种	英语