气候变化领域集成服务门户(CCPortal): Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model

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DOI	10.1039/c9ee03710a
	Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model
	Zhan L.; Li S.; Lau T.-K.; Cui Y.; Lu X.; Shi M.; Li C.-Z.; Li H.; Hou J.; Chen H.
发表日期	2020
ISSN	1754-5692
起始页码	635
结束页码	645
卷号	13 期号:2
英文摘要	Nowadays, organic solar cells (OSCs) with Y6 and its derivatives as electron acceptors provide the highest efficiencies among the studied binary OSCs. To further improve the performances of OSCs, the fabrication of ternary OSCs (TOSCs) is a convenient strategy. Essentially, morphology control and the trade-off between voltage and photocurrent are the main critical issues in TOSCs. Herein, we address these problems by constructing TOSCs where an alloy-like composite is formed between Y6 and a newly designed derivative, BTP-M. Employing an electron-pushing methyl substituent as a replacement for the electron-withdrawing F atoms on Y6, BTP-M shows higher energy levels and lower crystallinity than Y6. As a result, the obtained Y6:BTP-M alloy can simultaneously optimize energy levels to reduce energy loss as well as the morphologies of the active layers to favor photocurrent generation, leading to an enhanced open-circuit voltage (Voc) of 0.875 V together with a larger short-circuit current density (Jsc) of 26.56 mA cm-2 for TOSCs based on the polymer donor PM6 and Y6:BTP-M acceptor alloy. Consequently, a best efficiency of 17.03% is achieved for the corresponding TOSCs, which is among the best values for single-junction OSCs. In addition, our TOSCs also exhibit good thickness tolerance, and can reach 14.23% efficiency even though the active layer is as thick as 300 nm. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	Crystallinity; Economic and social effects; Energy dissipation; Open circuit voltage; Active Layer; Critical issues; Electron acceptor; Electronwithdrawing; Morphology control; Photocurrent generations; Single junction; Thickness tolerance; Organic solar cells; composite; efficiency measurement; electron; fuel cell; fullerene; model; polymer; replacement
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162908
作者单位	State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China; Department of Physics, Chinese University of Hong Kong, New Territories, 999077, Hong Kong; Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
推荐引用方式 GB/T 7714	Zhan L.,Li S.,Lau T.-K.,et al. Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model[J],2020,13(2).
APA	Zhan L..,Li S..,Lau T.-K..,Cui Y..,Lu X..,...&Chen H..(2020).Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model.Energy and Environmental Science,13(2).
MLA	Zhan L.,et al."Over 17% efficiency ternary organic solar cells enabled by two non-fullerene acceptors working in an alloy-like model".Energy and Environmental Science 13.2(2020).