Synthesis and characterization of red light-emitting electrophosphorescent polymers with different triplet energy main chain
文献类型：期刊论文
| 作者 | Ma, Zhihua1,2; Ding, Junqiao1; Cheng, Yanxiang1; Xie, Zhiyuan1; Wang, Lixiang1; Jing, Xiabin1; Wang, Fosong1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2011-05-04 |
| 卷号 | 52期号:10页码:2189-2197 |
| 关键词 | Electrophosphorescent Polymers Light Emitting Diodes Triplet Energy |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2011.03.023 |
| 英文摘要 | Red light-emitting electrophosphorescent polymers with poly(fluorene-alt-carbazole) (PFCz) and poly (3,6-carbazole) (PCz) as the main chain, and the quinoline-based iridium (Ir) complex as the side chain have been synthesized by Suzuki and modified Yamamoto polymerization, respectively. The triplet energy of the polymeric backbone is tuned from 2.1 eV of polyfluorene (PF) to 2.3 eV of PFCz and 2.6 eV of PCz. We find that, with the increasing triplet energy, the lifetime of the triplet excitons gradually increases, but the device efficiency becomes worse. The reason is that the alteration of the main chain structure leads to the increase of the highest occupied molecular orbital (HOMO) level of the polymeric host, which can facilitate the efficient hole injection and transportation. As a consequence of this enhancement of the hole current, charge balance in the emitting layer is destroyed, and correspondingly, the poorer device performance is achieved. Our results, we believe, indicate that besides the triplet energy, charge balance is a crucial determinant to develop high efficiency red light-emitting electrophosphorescent polymers. (C) 2011 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000290131500011 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/72809]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ding, Junqiao |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Zhihua,Ding, Junqiao,Cheng, Yanxiang,et al. Synthesis and characterization of red light-emitting electrophosphorescent polymers with different triplet energy main chain[J]. POLYMER,2011,52(10):2189-2197. |
| APA | Ma, Zhihua.,Ding, Junqiao.,Cheng, Yanxiang.,Xie, Zhiyuan.,Wang, Lixiang.,...&Wang, Fosong.(2011).Synthesis and characterization of red light-emitting electrophosphorescent polymers with different triplet energy main chain.POLYMER,52(10),2189-2197. |
| MLA | Ma, Zhihua,et al."Synthesis and characterization of red light-emitting electrophosphorescent polymers with different triplet energy main chain".POLYMER 52.10(2011):2189-2197. |
入库方式： OAI收割
来源：化学研究所
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