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Design of All-Small-Molecule Organic Solar Cells Approaching 14% Efficiency via Isometric Terminal Alkyl Chain Engineering

文献类型：期刊论文

作者Chen, Haiyan1,2,3; Tang, Hua2,3; Hu, Dingqin1,2,3; Xiao, Yiqun4; Fu, Jiehao2; Lv, Jie2,3; Yu, Qingqing2,3; Xiao, Zeyun1,2,3; Lu, Xinhui4; Hu, Hanlin5
刊名ENERGIES
出版日期2021-05-01
卷号14期号:9页码:11
关键词organic solar cell small-molecule donor alkyl chains morphology
DOI10.3390/en14092505
通讯作者Hu, Dingqin(hudingqin@cigit.ac.cn) ; Lu, Xinhui(xinhui.lu@cuhk.edu.hk) ; Hu, Hanlin(hanlinhu@szpt.edu.cn) ; Lu, Shirong(lushirong@cigit.ac.cn)
英文摘要Morphology is crucial to determining the photovoltaic performance of organic solar cells (OSCs). However, manipulating morphology involving only small-molecule donors and acceptors is extremely challenging. Herein, a simple terminal alkyl chain engineering process is introduced to fine-tune the morphology towards high-performance all-small-molecule (ASM) OSCs. We successfully chose a chlorinated two-dimension benzo[1,2-b:4,5-b ']dithiophene (BDT) central unit and two isomeric alkyl cyanoacetate as the end-capped moieties to conveniently synthesize two isomeric small-molecule donors, namely, BT-R-O-Cl and BT-R-EH-Cl, each bearing linear n-octyl (O) as the terminal alkyl chain and another branched 2-ethylhexyl (EH) as the terminal alkyl chain. The terminal alkyl chain engineering process provided BT-R-O-Cl with 13.35% efficiency and BT-R-EH-Cl with 13.90% efficiency ASM OSCs, both with Y6 as the electron acceptor. The successful performance resulted from uniform phase separation and the favorable combination of face-on and edge-on molecular stacking of blended small-molecule donors and acceptors, which formed a fluent 3D transport channel and thus delivered high and balanced carrier mobilities. These findings demonstrate that alkyl chain engineering can finely control the morphology of ASM OSCs, and provides an alternative for the optimal design of small-molecule materials towards high-performance ASM OSCs.
资助项目Natural Science Foundation of Chongqing[cstc2019jcyj-msxmX0400] ; Youth Innovation Promotion Association Chinese Academy of Sciences[2020379] ; National Natural Science Foundation of China[62004129]
WOS研究方向Energy & Fuels
语种英语
WOS记录号WOS:000650299400001
出版者MDPI
源URL[http://119.78.100.138/handle/2HOD01W0/13483]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Hu, Dingqin; Lu, Xinhui; Hu, Hanlin; Lu, Shirong
作者单位1.Chongqing Univ, 174 Shazhengjie, Chongqing 400044, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
3.Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China
4.Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
5.Shenzhen Polytech, Hoffman Inst Adv Mat, 7098 Liuxian Blvd, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Haiyan,Tang, Hua,Hu, Dingqin,et al. Design of All-Small-Molecule Organic Solar Cells Approaching 14% Efficiency via Isometric Terminal Alkyl Chain Engineering[J]. ENERGIES,2021,14(9):11.
APA Chen, Haiyan.,Tang, Hua.,Hu, Dingqin.,Xiao, Yiqun.,Fu, Jiehao.,...&Lu, Shirong.(2021).Design of All-Small-Molecule Organic Solar Cells Approaching 14% Efficiency via Isometric Terminal Alkyl Chain Engineering.ENERGIES,14(9),11.
MLA Chen, Haiyan,et al."Design of All-Small-Molecule Organic Solar Cells Approaching 14% Efficiency via Isometric Terminal Alkyl Chain Engineering".ENERGIES 14.9(2021):11.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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