Side Chain Engineering on Medium Bandgap Copolymers to Suppress Triplet Formation for High-Efficiency Polymer Solar Cells
文献类型：期刊论文
| 作者 | Xue, Lingwei1,2; Yang, Yankang1,5; Xu, Jianqiu3,4,7; Zhang, Chunfeng3,4,7; Bin, Haijun1,5; Zhang, Zhi-Guo1; Qiu, Beibei1; Li, Xiaojun1,5; Sun, Chenkai1,5; Gao, Liang1,5 |
| 刊名 | ADVANCED MATERIALS
 |
| 出版日期 | 2017-10-25 |
| 卷号 | 29期号:40 |
| 关键词 | Fluorination Effect Polymer Donors Photoinduced Force Microscopy Polymer Solar Cells |
| 英文摘要 | Suppression of carrier recombination is critically important in realizing high-efficiency polymer solar cells. Herein, it is demonstrated difluoro-substitution of thiophene conjugated side chain on donor polymer can suppress triplet formation for reducing carrier recombination. A new medium bandgap 2D-conjugated D-A copolymer J91 is designed and synthesized with bi(alkyl-difluorothienyl)-benzodithiophene as donor unit and fluorobenzotriazole as acceptor unit, for taking the advantages of the synergistic fluorination on the backbone and thiophene side chain. J91 demonstrates enhanced absorption, low-lying highest occupied molecular orbital energy level, and higher hole mobility, in comparison with its control polymer J52 without fluorination on the thiophene side chains. The transient absorption spectra indicate that J91 can suppress the triplet formation in its blend film with n-type organic semiconductor acceptor m-ITIC (3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,1 1,11 -tetrakis(3-hexylphenyl)-dithieno[2,3-d: 2,3 '-d']-s-indaceno[1,2-b:5,6-b']-dithiophene). With these favorable properties, a higher power conversion efficiency of 11.63% with high V-oc of 0.984 V and high J(sc) of 18.03 mA cm(-2) obtained for the polymer solar cells based on J91/m-ITIC with thermal annealing. The improved photovoltaic performance by thermal annealing is explained from the morphology change upon thermal annealing as revealed by photoinduced force microscopy. The results indicate that side chain engineering can provide a new solution to suppress carrier recombination toward high efficiency, thus deserves further attention. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39135]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Organ Solids, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100190, Peoples R China 2.Pingdingshan Univ, Coll Chem & Chem Engn, Pingdingshan 467000, Henan, Peoples R China 3.Nanjing Univ, Natl Lab Solid State Microstruct, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China 4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China 5.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100083, Peoples R China 6.Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China 7.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China 8.Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoelect Mat, Suzhou 215123, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, Lingwei,Yang, Yankang,Xu, Jianqiu,et al. Side Chain Engineering on Medium Bandgap Copolymers to Suppress Triplet Formation for High-Efficiency Polymer Solar Cells[J]. ADVANCED MATERIALS,2017,29(40). |
| APA | Xue, Lingwei.,Yang, Yankang.,Xu, Jianqiu.,Zhang, Chunfeng.,Bin, Haijun.,...&Li, Yongfang.(2017).Side Chain Engineering on Medium Bandgap Copolymers to Suppress Triplet Formation for High-Efficiency Polymer Solar Cells.ADVANCED MATERIALS,29(40). |
| MLA | Xue, Lingwei,et al."Side Chain Engineering on Medium Bandgap Copolymers to Suppress Triplet Formation for High-Efficiency Polymer Solar Cells".ADVANCED MATERIALS 29.40(2017). |
入库方式： OAI收割
来源：化学研究所
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