Supramolecular Phosphorescent Polymer Iridium Complexes for High-Efficiency Organic Light-Emitting Diodes
Supramolecular Phosphorescent Polymer Iridium Complexes for High-Efficiency Organic Light-Emitting Diodes
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DOI：
10.1021/cm400333c
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发表时间：
2013-03
影响因子：
8.6
通讯作者：
Aihui Liang;Kai Zhang;Jie Zhang;F. Huang;Xu-hui Zhu;Yong Cao
中科院分区：
文献类型：
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作者：
Aihui Liang;Kai Zhang;Jie Zhang;F. Huang;Xu-hui Zhu;Yong Cao
介绍了一种新型溶液可加工电致发光材料——超分子磷光聚合物（SPPs）的合成。spp是通过利用发光铱单体1和基于“三氟烯基”的单体2和3的有效非键自组装而形成的，它们与冠醚或二苄胺单元相连。通过核磁共振（1H）和粘度测量对超分子组装过程进行了监测和表征。此外，SPPs表现出本征玻璃化转变，玻璃化转变温度（Tg）为72.5 ~ 81.5℃，这在单体中是不存在的。由这些SPPs组成的有机发光二极管作为发射器的特性表明，在450 cd - m-2的亮度下，效率为14.6 cd - a - 1。考虑到所设计的SPPs具有良好的溶液可加工性和无催化剂聚合工艺，结合良好的装置性能，本研究为SPPs的开发提供了一条有希望的替代途径。
The synthesis of supramolecualr phosphorescent polymers (SPPs) as a novel class of solution-processable electroluminescent (EL) emitters was presented. The SPPs were formed by utilizing the efficient nonbonding self-assembly of luminescent iridium monomer 1 and “terfluorenyl”-based monomers 2 and 3, tethered with either a crown ether or dibenzylammonium unit. The supramolecular assembly process was monitored and illustrated by 1H nuclear magnetic resonance (NMR) and viscosity measurement. Moreover, the SPPs exhibit an intrinsic glass transition with a glass-transition temperature (Tg) of 72.5–81.5 °C, which is absent in the monomers. The characterization of organic light-emitting diodes that consisted of these SPPs as an emitter gave an efficiency of 14.6 cd A–1 at a luminance of 450 cd m–2. Considering the good solution processability and catalyst-free polymerization process for the designed SPPs, combining the good device performances, the present study provide a promising alternative route to develop s...