15.3% Efficiency All-Small-Molecule Organic Solar Cells Achieved by a Locally Asymmetric F, Cl Disubstitution Strategy

doi:10.1002/advs.202004262

	15.3% Efficiency All-Small-Molecule Organic Solar Cells Achieved by a Locally Asymmetric F, Cl Disubstitution Strategy
	Hu, Dingqin 2,4; Yang, Qianguang 1,4; Zheng, Yujie 2; Tang, Hua 1,4; Chung, Sein 3; Singh, Ranbir 5; Lv, Jie 4; Fu, Jiehao 4; Kan, Zhipeng 1,4; Qin, Bo 2
刊名	ADVANCED SCIENCE
	2021-02-22
页码	7
关键词	organic solar cells all small molecule asymmetric disubstitution strategy
DOI	10.1002/advs.202004262
通讯作者	Xiao, Zeyun(xiao.z@cigit.ac.cn) ; Sun, Kuan(kuan.sun@cqu.edu.cn) ; Lu, Shirong(lushirong@cigit.ac.cn)
英文摘要	Single junction binary all-small-molecule (ASM) organic solar cells (OSCs) with power conversion efficiency (PCE) beyond 14% are achieved by using non-fullerene acceptor Y6 as the electron acceptor, but still lag behind that of polymer OSCs. Herein, an asymmetric Y6-like acceptor, BTP-FCl-FCl, is designed and synthesized to match the recently reported high performance small molecule donor BTR-Cl, and a record efficiency of 15.3% for single-junction binary ASM OSCs is achieved. BTP-FCl-FCl features a F,Cl disubstitution on the same end group affording locally asymmetric structures, and so has a lower total dipole moment, larger average electronic static potential, and lower distribution disorder than those of the globally asymmetric isomer BTP-2F-2Cl, resulting in improved charge generation and extraction. In addition, BTP-FCl-FCl based active layer presents more favorable domain size and finer phase separation contributing to the faster charge extraction, longer charge carrier lifetime, and much lower recombination rate. Therefore, compared with BTP-2F-2Cl, BTP-FCl-FCl based devices provide better performance with FF enhanced from 71.41% to 75.36% and J(sc) increased from 22.35 to 24.58 mA cm(-2), leading to a higher PCE of 15.3%. The locally asymmetric F, Cl disubstitution on the same end group is a new strategy to achieve high performance ASM OSCs.
资助项目	Chongqing Funds for Distinguished Young Scientists[cstc2020jcyj-jqX0018] ; General Program of National Natural Science Foundation of China[62074149] ; artificial intelligence key project of Chongqing[cstc2017rgzn-zdyfX0030] ; National Natural Science Foundation of China[22071238] ; National Natural Science Foundation of China[21801238] ; National Natural Science Foundation of China[61805245] ; National Natural Science Foundation of China[62074022] ; National Natural Science Foundation of China[12004057] ; CAS Pioneer Hundred Talents Program B[Y92A010Q10] ; CAS Pioneer Hundred Talents Program[Y82A060Q10] ; CAS Pioneer Hundred Talents Program[Y92A160Q10] ; CAS Pioneer Hundred Talents Program[E0296102]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	WILEY
WOS记录号	WOS:000620226900001
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/12952]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Xiao, Zeyun; Sun, Kuan; Lu, Shirong
作者单位	1.Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China 2.Chongqing Univ, Sch Energy & Power Engn, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China 3.Pohang Univ Sci & Technol, Dept Chem Engn, Pohang 790784, South Korea 4.Chinese Acad Sci, Univ Chinese Acad Sci UCAS Chongqing, Chongqing Sch, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 5.Dongguk Univ, Dept Energy & Mat Engn, Seoul 100715, South Korea
推荐引用方式 GB/T 7714	Hu, Dingqin,Yang, Qianguang,Zheng, Yujie,et al. 15.3% Efficiency All-Small-Molecule Organic Solar Cells Achieved by a Locally Asymmetric F, Cl Disubstitution Strategy[J]. ADVANCED SCIENCE,2021:7.
APA	Hu, Dingqin.,Yang, Qianguang.,Zheng, Yujie.,Tang, Hua.,Chung, Sein.,...&Lu, Shirong.(2021).15.3% Efficiency All-Small-Molecule Organic Solar Cells Achieved by a Locally Asymmetric F, Cl Disubstitution Strategy.ADVANCED SCIENCE,7.
MLA	Hu, Dingqin,et al."15.3% Efficiency All-Small-Molecule Organic Solar Cells Achieved by a Locally Asymmetric F, Cl Disubstitution Strategy".ADVANCED SCIENCE (2021):7.