Highly efficient polymer solar cells with PTB7-based narrow band-gap conjugated polyelectrolytes as cathode interlayers: Device performance dependence on the ionic pendants
文献类型：期刊论文
| 作者 | Zhang, Wenjun; Song, Changjian; Li, Yaru; Liu, Xiaohui; Wang, Xingzhu; Sun, Xiaohua; Fang, Junfeng |
| 刊名 | ORGANIC ELECTRONICS
 |
| 出版日期 | 2017 |
| 卷号 | 47页码:94-101 |
| ISSN号 | 1566-1199 |
| 英文摘要 | Narrow band-gap conjugated polyelectrolytes (NBGCPs) combine the advantages of narrow band-gap conjugated polymers and polyelectrolytes. However, they are limited reported and seldom used in polymer solar cells (PSCs). Herein, we design and synthesized two PTB7-based NBGCPs, cationic PTB7-NBr and zwitterionic PTB7-NSO3, as cathode interlayers (CILs) in conventional PSCs. Compared to poly [4,8-bis(2-ethylhexyloxyl)benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-ethylhexyl-3-fuorothithieno[3,4-b]thiophene-2-carboxylate-4,6-diyl] (PTB7), both PTB7-NBr and PTB7-NSO3 have similar absorption while PTB7-NBr has a higher HOMO level than PTB7 and PTB7-NSO3. With PTB7-NBr and PTB7-NSO3 as CIL and Al as cathode, the devices both exhibited high efficiencies. The optimal power conversion efficiencies (PCEs) of PTB7-NBr device and PTB7-NSO3 device are about 9%. However, PTB7-NBr devices are less sensitive to the CIL film thicknesses and the PCEs of PTB7-NSO3 device decrease sharply when the thickness of PTB7-NSO3 over 3 nm. What's more, when the devices with an Ag cathode PTB7-NBr exhibits a much better interfacial modification than PTB7-NSO3. Ultraviolet photoelectron spectroscopy (UPS) indicate that the work functions of PTB7-NBr and PTB7-NSO3 film on Al are identical while on Ag they are different. We suggest the insensitivity to CIL thickness and good performance for Ag device of PTB7-NBr devices are attributed to the bromide anions in PTB7-NBr. The report on PTB7-based NBGCPs broads the types of organic cathode interfacial materials and is beneficial to the deep insight of ionic effect in electrolyte materials. (C) 2017 Elsevier B.V. All rights reserved. |
| 公开日期 | 2017-12-25 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/13713]  |
| 专题 | 2017专题 |
| 推荐引用方式 GB/T 7714 | Zhang, Wenjun,Song, Changjian,Li, Yaru,et al. Highly efficient polymer solar cells with PTB7-based narrow band-gap conjugated polyelectrolytes as cathode interlayers: Device performance dependence on the ionic pendants[J]. ORGANIC ELECTRONICS,2017,47:94-101. |
| APA | Zhang, Wenjun.,Song, Changjian.,Li, Yaru.,Liu, Xiaohui.,Wang, Xingzhu.,...&Fang, Junfeng.(2017).Highly efficient polymer solar cells with PTB7-based narrow band-gap conjugated polyelectrolytes as cathode interlayers: Device performance dependence on the ionic pendants.ORGANIC ELECTRONICS,47,94-101. |
| MLA | Zhang, Wenjun,et al."Highly efficient polymer solar cells with PTB7-based narrow band-gap conjugated polyelectrolytes as cathode interlayers: Device performance dependence on the ionic pendants".ORGANIC ELECTRONICS 47(2017):94-101. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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