Significant Influence of the Methoxyl Substitution Position on Optoelectronic Properties and Molecular Packing of Small-Molecule Electron Acceptors for Photovoltaic Cells
文献类型：期刊论文
| 作者 | Li, Sunsun1,4; Ye, Long2,3; Zhao, Wenchao1,4; Zhang, Shaoqing1; Ade, Harald2,3; Hou, Jianhui1,4 |
| 刊名 | ADVANCED ENERGY MATERIALS
 |
| 出版日期 | 2017-09-06 |
| 卷号 | 7期号:17 |
| 关键词 | Methoxy Groups Nonfullerene Acceptors Optoelectronic Properties Polymer Solar Cells Substitution Positions |
| 英文摘要 | Molecular engineering of nonfullerene electron acceptors is of great importance for the development of organic photovoltaics. In this study, a series of methoxyl-modified dithieno[2,3-d: 2', 3'-d']-s-indaceno[1,2-b: 5,6-b']dithiophene-based small-molecule acceptor (SMA) isomers are synthesized and characterized to determine the effect of substitution position of the terminal group in these acceptor-donor-acceptor-type SMAs. Minor changes in the substitution position are demonstrated to greatly influence the optoelectronic properties and molecular packing of the isomers. Note that SMAs with planar molecular backbones show more ordered molecular packing and smaller pi-pi stacking distances, thus dramatically higher electron mobilities relative to their counterparts with distorted end-groups. By utilizing polymer poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b: 4,5-b']dithiophen)-co-(1,3-di(5-thiophene-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2-c: 4,5c'] dithiophene-4,8-dione)] (PBDB-T) as an electron donor, an optimum power conversion efficiency (PCE) of 11.9% is achieved in the device based on PBDB-T: IT-OM-2, which is among the top efficiencies reported as of yet. Moreover, the PCE stays above 10% as the film thickness increases to 250 nm, which is very advantageous for large-area printing. Overall, the intrinsic molecular properties as well as the morphologies of blends can be effectively modulated by manipulating the substituent position on the terminal groups, and the structure-property relationships gleaned from this study will aid in designing more efficient SMAs for versatile applications. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39272]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 2.North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA 3.North Carolina State Univ, Organ & Carbon Elect Lab ORaCEL, Raleigh, NC 27695 USA 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Sunsun,Ye, Long,Zhao, Wenchao,et al. Significant Influence of the Methoxyl Substitution Position on Optoelectronic Properties and Molecular Packing of Small-Molecule Electron Acceptors for Photovoltaic Cells[J]. ADVANCED ENERGY MATERIALS,2017,7(17). |
| APA | Li, Sunsun,Ye, Long,Zhao, Wenchao,Zhang, Shaoqing,Ade, Harald,&Hou, Jianhui.(2017).Significant Influence of the Methoxyl Substitution Position on Optoelectronic Properties and Molecular Packing of Small-Molecule Electron Acceptors for Photovoltaic Cells.ADVANCED ENERGY MATERIALS,7(17). |
| MLA | Li, Sunsun,et al."Significant Influence of the Methoxyl Substitution Position on Optoelectronic Properties and Molecular Packing of Small-Molecule Electron Acceptors for Photovoltaic Cells".ADVANCED ENERGY MATERIALS 7.17(2017). |
入库方式： OAI收割
来源：化学研究所
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