Polymer Electron Acceptors Containing Boron-Nitrogen Coordination Bond (B <- N) for All-Polymer Solar Cells
文献类型：期刊论文
| 作者 | Liu, Jun; Wang, Li-xiang |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2017-12-20 |
| 期号 | 12页码:1856-1869 |
| 关键词 | All-polymer Solar Cells Electron Acceptor Boron-nitrogen Coordination Bond Energy Levels Electron Mobility |
| ISSN号 | 1000-3304 |
| DOI | 10.11777/j.issn1000-3304.2017.17205 |
| 英文摘要 | All-polymer solar cells (all-PSCs) use blend of polymer electron donor and polymer electron acceptor as active layer. There are much less polymer electron acceptors than polymer electron donors. In contrast to the molecular design of typical polymer acceptors using imide structure, we proposed in 2015 to design polymer acceptors using boron-nitrogen coordination bond (B <- N). This paper summarizes our recent progress on polymer acceptors containing B <- N unit. At first, we elucidate the principle of B <- N unit to downshift LUMO/HOMO energy levels of conjugated polymers. Then we disclose the three effects of B <- N unit on the opto-electronic properties of the repeating units of conjugated polymers, i.e. downshifting the LUMO/HOMO energy levels, redshifting the absorption spectra and fixing the planar configuration. We discuss the two molecular design approaches to develop polymer electron acceptors containing B <- N unit. One is to copolymerize a building block containing one B <- N unit with another electron-deficient building block to develop A-A type conjugated polymers. The other is to copolymerize a building block containing two B <- N units with another electron-rich building block to develop D-A type conjugated polymers. The feature of the polymer acceptors containing B <- N unit is their delocalized LUMO and tunable LUMO energy levels, which lead to all-PSC devices with high open-circuit voltage. We also show how to use molecular design to tune the key opto-electronic properties of the polymer acceptors containing B <- N unit. The UV-Vis absorption spectra can be tuned by copolymerizing with some narrow bandgap units. The LUMO/HOMO energy levels can be tuned by changing the electron-donating/withdrawing substitutes on the copolymerization unit. The electron mobilities can be enhanced by decreasing the z-z stacking distance or using pseudo-straight configuration of the polymer backbone. These molecular designs lead to an improvement of all-PSC power conversion efficiency from 0.15% in 2015 to > 6% in 2017. Finally, we outlook the future of high efficiency all-PSC devices based on polymer acceptors containing B <- N unit. |
| 语种 | 英语 |
| WOS记录号 | WOS:000419398800002 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/45389]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Liu, Jun |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jun,Wang, Li-xiang. Polymer Electron Acceptors Containing Boron-Nitrogen Coordination Bond (B <- N) for All-Polymer Solar Cells[J]. ACTA POLYMERICA SINICA,2017(12):1856-1869. |
| APA | Liu, Jun,&Wang, Li-xiang.(2017).Polymer Electron Acceptors Containing Boron-Nitrogen Coordination Bond (B <- N) for All-Polymer Solar Cells.ACTA POLYMERICA SINICA(12),1856-1869. |
| MLA | Liu, Jun,et al."Polymer Electron Acceptors Containing Boron-Nitrogen Coordination Bond (B <- N) for All-Polymer Solar Cells".ACTA POLYMERICA SINICA .12(2017):1856-1869. |
入库方式： OAI收割
来源：化学研究所
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