Synthesis and electrolumine scent property of poly (p-phenylenevinylene)s bearing triarylamine pendants
Synthesis and electrolumine scent property of poly (p-phenylenevinylene)s bearing triarylamine pendants
复制标题
DOI：
10.1016/j.polymer.2005.03.036
复制
发表时间：
2005-05-11
期刊：
影响因子：
4.6
通讯作者：
Nishide, H
中科院分区：
文献类型：
--
作者：
Liang, F;Pu, YJ;Nishide, H
通过Wittig-Horner反应和Knovenagel反应合成了两种含三芳胺侧链的聚对苯乙炔衍生物TPA-PPV和TPA-CN-PPV。聚合物的光学性能通过从三芳胺侧链到聚对苯乙炔主链的能量转移而得到改善。循环伏安分析表明，TPA侧链的HOMO能级高于PPV主链的HOMO能级，表明空穴从ITO注入TPA部分，再由TPA部分注入PPV比直接从ITO注入PPV主链更有利。使用TPA-PPV作为发光层的单层发光二极管在8V偏压下的最大亮度为790cd/m(2)，而采用商用MEH-PPV作为发射体的控制器件在11V下的最大亮度为250cd/m(2)，更高的亮度和更高的电流密度归因于基于TPA-PPV的器件中有效的空穴注入和/或空穴传输。(C)2005爱思唯尔有限公司。保留所有权利。
Two poly(p-phenylenevinylene) derivatives, TPA-PPV and TPA-CN-PPV, bearing a triarylamine pendant were synthesized by the Wittig-Horner and Knoevenagel reactions, respectively. The optical properties of the polymers were improved by energy transfer from the triarylamine pendant to the poly(p-phenylenevinylene) main chain. Cyclic voltammetry revealed that the HOMO energy level of the pendant TPA moiety is higher than that of the PPV main chain, suggesting that the hole injection from ITO into the TPA moiety, then from the TPA moiety into PPV is more favorable than directly from ITO into the PPV main chain. A single-layer light-emitting diode using TPA-PPV as the emitting layer exhibited a maximum brightness of 790 cd/m(2) at a bias of 8 V, while the control device employing commercially available MEH-PPV as the emitter showed a maximum brightness of 250 cd/m(2) under 11 V. The higher brightness combined with the higher current density was attributed to the effective hole injection and/or hole transport in the TPA-PPV-based device. (c) 2005 Elsevier Ltd. All rights reserved.