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DOI	10.1039/d0ee00862a
	Tuning the electron-deficient core of a non-fullerene acceptor to achieve over 17% efficiency in a single-junction organic solar cell
	Zhu C.; Yuan J.; Cai F.; Meng L.; Zhang H.; Chen H.; Li J.; Qiu B.; Peng H.; Chen S.; Hu Y.; Yang C.; Gao F.; Zou Y.; Li Y.
发表日期	2020
ISSN	17545692
起始页码	2459
结束页码	2466
卷号	13 期号:8
英文摘要	Finding effective molecular design strategies to enable efficient charge generation and small energy loss is among the long-standing challenges in developing high performance non-fullerene organic solar cells (OSCs). Recently, we reported Y-series non-fullerene acceptors with an electron-deficient-core-based fused structure (typically Y6), opening a new door to achieve high external quantum efficiency (~80%) while maintaining low energy loss (~0.57 eV). On this basis, further reducing the energy losses and ultimately improving the performance of OSCs has become a research hotspot. In this paper, we design and synthesize a new member of the Y-series acceptor family, Y18, which adopts a fused benzotriazole segment with unique luminescence properties as its electron-deficient core. Compared to Y6, the benzotriazole-based acceptor Y18 exhibits extended optical absorption and higher voltage. Consequently, the device delivers a promising power conversion efficiency of 16.52% with a very low energy loss of 0.53 eV. Further device optimization by exploiting a ternary blend strategy allowed us to achieve a high efficiency of 17.11% (certified as 16.76% by NREL). Y18 may become one of the most important candidate materials for its broader absorption spectra and higher voltage of Y18 (compared to Y6) in the OSCs field. © 2020 The Royal Society of Chemistry.
英文关键词	Energy dissipation; Fullerenes; Light absorption; Luminescence; Organic solar cells; Candidate materials; Charge generation; Device optimization; Electron-deficient; External quantum efficiency; Luminescence properties; Molecular design; Power conversion efficiencies; Conversion efficiency; absorption spectrum; detection method; efficiency measurement; electron; equipment; fuel cell; optimization; performance assessment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189595
作者单位	College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China; Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 58183, Sweden; Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea; Moe Key Laboratory of Low-grade Energy Utilization Technologies and Systems, CQU-NUS Renewable Energy Materials and Power Engineering, Chongqing University, Chongqing, 400044, China
推荐引用方式 GB/T 7714	Zhu C.,Yuan J.,Cai F.,et al. Tuning the electron-deficient core of a non-fullerene acceptor to achieve over 17% efficiency in a single-junction organic solar cell[J],2020,13(8).
APA	Zhu C..,Yuan J..,Cai F..,Meng L..,Zhang H..,...&Li Y..(2020).Tuning the electron-deficient core of a non-fullerene acceptor to achieve over 17% efficiency in a single-junction organic solar cell.Energy & Environmental Science,13(8).
MLA	Zhu C.,et al."Tuning the electron-deficient core of a non-fullerene acceptor to achieve over 17% efficiency in a single-junction organic solar cell".Energy & Environmental Science 13.8(2020).