Difluorinated Oligothiophenes for High-Efficiency All-Small-Molecule Organic Solar Cells: Positional Isomeric Effect of Fluorine Substitution on Performance Variations
文献类型：期刊论文
| 作者 | Duan, Tainan2,3 ; Gao, Jie3; Babics, Maxime4,5; Kan, Zhipeng3; Zhong, Cheng6; Singh, Ranbir1; Yu, Donghong2; Lee, Jaewon7; Xiao, Zeyun3; Lu, Shirong3
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| 刊名 | SOLAR RRL
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| 出版日期 | 2020-01-13 |
| 页码 | 10 |
| ISSN号 | 2367-198X |
| 关键词 | binding energies fluorination nonfullerene organic solar cells small-molecule donors |
| DOI | 10.1002/solr.201900472 |
| 通讯作者 | Kan, Zhipeng(kanzhipeng@cigit.ac.cn) ; Zhong, Cheng(zhongcheng@whu.edu.cn) ; Lu, Shirong(lushirong@cigit.ac.cn) |
| 英文摘要 | Three symmetrically difluorinated organic semiconductors (namely D5T2F-P, D5T2F-S, and D5T2F-T) containing rhodanine-flanked pentathiophene structures are synthesized and used as donors in all-small-molecule organic solar cells (ASM-OSCs) prepared with the small-molecule acceptor 2,2 '-((2Z,2 ' Z)-((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b ']dithiophene-2,7-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IDIC-4F). The different substitutional positions of fluorine atoms (-F) in the conjugated backbone of the donor molecule lead to various material and photovoltaic properties being exhibited. Among the three isomers, the centrally fluorinated D5T2F-P exhibits a redshifted absorption spectrum, downshifted highest occupied molecular orbital (HOMO) energy level, and improved miscibility with IDIC-4F in the blend films, all of which result in superior device performance. The power conversion efficiency (PCE) of the ASM-OSCs based on D5T2F-P:IDIC-4F reaches an impressive value of 9.36% with an open-circuit voltage (V-OC) value of 0.86 V and a short-circuit current density (J(SC)) value of 16.94 mA cm(-2), whereas those of D5T2F-S (6.11%) and D5T2F-T (5.42%) are much lower. In comparison, an ASM-OSC based on the nonfluorinated analogue DRCN5T fabricated under the same conditions exhibits poorer performance (8.03% with IDIC-4F), revealing 16% enhancement in the PCE achieved through backbone fluorination. The PCE of 9.36% may be one of the highest efficiencies of oligothiophene-based ASM-OSCs reported in the literature to date. |
| 资助项目 | National Youth Thousand Program Project[R52A199Z11] ; National Special Funds for Repairing and Purchasing Scientific Institutions[Y72Z090Q10] ; Artificial Intelligence Key Project of Chongqing[cstc2017rgzn-zdyfX0030] ; National Natural Science Foundation of China[61805245] ; National Natural Science Foundation of China[21702202] ; Youth Innovation Promotion Association CAS[2019373] ; CAS Pioneer Hundred Talents Program[Y82A060Q10] ; CAS Pioneer Hundred Talents Program[Y92A160Q10] ; Recruitment Program of Global Experts[R52A199Z10] ; Natural Science Foundation of Chongqing[cstc2019jcyj-msxm2027] ; Innovation fund Denmark (INKA project) ; Sino-Danish Centre for Education and Research (SDC) |
| WOS研究方向 | Energy & Fuels ; Materials Science |
| 语种 | 英语 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| WOS记录号 | WOS:000506690600001 |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/10204]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Kan, Zhipeng; Zhong, Cheng; Lu, Shirong |
| 作者单位 | 1.Dongguk Univ, Dept Energy & Mat Engn, Seoul, South Korea 2.Aalborg Univ, Dept Chem & Biosci, DK-9220 Aalborg, Denmark 3.Chinese Acad Sci, Organ Semicond Res Ctr, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 4.Imperial Coll London, Dept Chem, London SW7 2AZ, England 5.Imperial Coll London, Ctr Plast Elect, London SW7 2AZ, England 6.Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China 7.Univ Calif Santa Barbara, Dept Chem & Biochem, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA |
| 推荐引用方式 GB/T 7714 | Duan, Tainan,Gao, Jie,Babics, Maxime,et al. Difluorinated Oligothiophenes for High-Efficiency All-Small-Molecule Organic Solar Cells: Positional Isomeric Effect of Fluorine Substitution on Performance Variations[J]. SOLAR RRL,2020:10. |
| APA | Duan, Tainan.,Gao, Jie.,Babics, Maxime.,Kan, Zhipeng.,Zhong, Cheng.,...&Lu, Shirong.(2020).Difluorinated Oligothiophenes for High-Efficiency All-Small-Molecule Organic Solar Cells: Positional Isomeric Effect of Fluorine Substitution on Performance Variations.SOLAR RRL,10. |
| MLA | Duan, Tainan,et al."Difluorinated Oligothiophenes for High-Efficiency All-Small-Molecule Organic Solar Cells: Positional Isomeric Effect of Fluorine Substitution on Performance Variations".SOLAR RRL (2020):10. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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