New carbazole-based copolymers as amorphous hole-transporting materials for multilayer light-emitting diodes
文献类型：期刊论文
| 作者 | Grigalevicius, Saulius; Ma, Liang; Qian, Gang; Xie, Zhiyuan; Forster, Michael; Scherf, Ullrich |
| 刊名 | MACROMOLECULAR CHEMISTRY AND PHYSICS
 |
| 出版日期 | 2007-02-21 |
| 卷号 | 208期号:4页码:349-355 |
| 关键词 | Amorphous Materials Copolymers Light-emitting Diodes (Leds) Nmr Thermal Stability |
| ISSN号 | 1022-1352 |
| DOI | 10.1002/macp.200600498 |
| 英文摘要 | New carbazole-based copolymers, which contain various concentrations of 9-alkyl-3, 6-carbazole fragments in the main chain connected via alkylene spacers, have been synthesized by Ni(0)-catalyzed Yamamoto-type aryl-aryl coupling reactions. Full characterization of the copolymer structure by NMR spectroscopy and elemental analysis is presented. These compounds represent amorphous materials of high thermal stability with glass transition temperatures of 151-162 degrees C and thermal decomposition starting at temperatures > 390 degrees C. UV-Vis absorption and photoluminescence emission of the copolymers confirmed that the effectively conjugated segment in the 3,6-linked carbazole-type copolymers is limited to dyads (dimeric units). However, copolymers with varying concentrations of the oligocarbazole chromophores demonstrate different charge injection and transport properties in multilayer light-emitting diodes with the copolymers as the hole transport and Alq(3) as the electroluminescent/electron transport layer. The device based on a copolymer composed of oligocarbazole blocks with an average length of around four carbazoles exhibited the best overall performance with a turn-on voltage of 3.5 V, a maximal photometric efficiency of 4.1 cd center dot A(-1) and maximum brightness of about 4 200 cd center dot m(-2). |
| 语种 | 英语 |
| WOS记录号 | WOS:000244794500002 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60693]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Grigalevicius, Saulius |
| 作者单位 | 1.Kaunas Univ Technol, Dept Organ Technol, LT-50254 Kaunas, Lithuania 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 3.Univ Wuppertal, D-42119 Wuppertal, Germany |
| 推荐引用方式 GB/T 7714 | Grigalevicius, Saulius,Ma, Liang,Qian, Gang,et al. New carbazole-based copolymers as amorphous hole-transporting materials for multilayer light-emitting diodes[J]. MACROMOLECULAR CHEMISTRY AND PHYSICS,2007,208(4):349-355. |
| APA | Grigalevicius, Saulius,Ma, Liang,Qian, Gang,Xie, Zhiyuan,Forster, Michael,&Scherf, Ullrich.(2007).New carbazole-based copolymers as amorphous hole-transporting materials for multilayer light-emitting diodes.MACROMOLECULAR CHEMISTRY AND PHYSICS,208(4),349-355. |
| MLA | Grigalevicius, Saulius,et al."New carbazole-based copolymers as amorphous hole-transporting materials for multilayer light-emitting diodes".MACROMOLECULAR CHEMISTRY AND PHYSICS 208.4(2007):349-355. |
入库方式： OAI收割
来源：化学研究所
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