A design strategy of bipolar host materials for more than 30 times extended lifetime in phosphorescent organic light-emitting diodes using benzocarbazole and quinazoline,Journal of Materials Chemistry C

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A design strategy of bipolar host materials for more than 30 times extended lifetime in phosphorescent organic light-emitting diodes using benzocarbazole and quinazoline
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-09 00:00:00 , DOI: 10.1039/c7tc02973j
Sung Moo Kim _{1,

2,

3,

4} , Ju Hui Yun _{1,

2,

3,

4} , Si Hyun Han _{1,

2,

3,

4} , Jun Yeob Lee _{1,

2,

3,

4}

Affiliation

Stable host materials based on benzocarbazole and quinazoline were synthesized to establish a design strategy of bipolar hosts for elongated lifetime in orange phosphorescent organic light-emitting diodes (PHOLEDs). Three host materials with benzocarbazole and quinazoline connected directly or through a phenyl linker were compared in terms of the device lifetime of the orange PHOLEDs. The connection between benzocarbazole and quinazoline through a phenyl linker was an effective way of improving the lifetime of the red PHOLEDs by more than twice and the molecular orbital distribution of the hosts was well correlated with the lifetime of the PHOLEDs. In particular, the lifetime of the PHOLEDs was extended by more than 30 times compared to a conventional PHOLED with a common CBP host.

中文翻译：

使用苯并咔唑和喹唑啉的磷光有机发光二极管中双极性主体材料的使用寿命延长30倍以上的设计策略

合成了基于苯并咔唑和喹唑啉的稳定主体材料，以建立双极性主体的设计策略，以延长橙色磷光有机发光二极管（PHOLED）的寿命。对橙色PHOLED的器件寿命进行了比较，将三种直接与苯并咔唑和喹唑啉连接的主体材料或通过苯基连接子连接的主体材料进行了比较。苯并咔唑和喹唑啉之间通过苯基连接的连接是将红色PHOLED的寿命延长两倍以上的有效途径，并且主体的分子轨道分布与PHOLED的寿命密切相关。特别是，与具有普通CBP主机的传统PHOLED相比，PHOLED的寿命延长了30倍以上。

更新日期：2017-09-14

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