Synthesis of diphenylamine-substituted phenylazomethine dendrimers and the performance of organic light-emitting diodes
Synthesis of diphenylamine-substituted phenylazomethine dendrimers and the performance of organic light-emitting diodes
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DOI：
10.1002/macp.200400381
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发表时间：
2005-03
影响因子：
2.5
通讯作者：
Jun-Sang Cho;Atsushi Kimoto;M. Higuchi;Kimihisa Yamamoto
中科院分区：
文献类型：
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作者：
Jun-Sang Cho;Atsushi Kimoto;M. Higuchi;Kimihisa Yamamoto
我们设计并合成了新型的二苯胺取代苯偶氮亚甲胺树枝状大分子(DP-Gn，n=1，2)作为有机电致发光二极管(OLED)的空穴传输材料。这些树状大分子类似于苯基甲亚胺树状大分子，表现出与金属离子的逐级金属络合。由于端胺基团的存在，它们具有良好的多重氧化还原性能和优异的热稳定性。利用树枝状大分子作为空穴传输材料，Alq3作为发射和电子传输材料，制备了双层电致发光器件。器件的电致发光性能随着树枝状大分子代数的增加而提高。此外，通过使用金属离子(0.5当量。与SnCl2)络合的DP-G2树枝状大分子，器件的发光亮度和电致发光效率分别提高了一倍以上和30%以上。这些金属络合的苯基甲亚胺树枝状大分子是一种新型的、有前途的高效有机发光器件材料。
We have designed and synthesized novel diphenylamine-substituted phenylazomethine dendrimers (DP-Gn, n = 1, 2) as hole-transport materials for organic light-emitting diodes (OLEDs). These dendrimers similar to phenylazomethine dendrimers showed a stepwise metal complexation with metal ions. They have good multi-redox properties attributed to the terminal amine moieties and excellent thermal stabilities. Double layer EL devices utilizing the dendrimers as a hole-transport material and Alq 3 as the emitting and electron transport materials were fabricated. The EL performances of the devices increased with higher dendrimer generations. Moreover, by using the metal ion (0.5 equiv. SnCl 2 )-complexed DP-G2 dendrimers, the luminance and EL efficiency of the devices were drastically increased by more than double and over 30%, respectively. These metal complexable phenylazomethine dendrimers are novel and promising materials for highly efficient OLEDs.