Hole transport materials with high glass transition temperatures for highly stable organic light-emitting diodes
Hole transport materials with high glass transition temperatures for highly stable organic light-emitting diodes
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DOI：
10.1016/j.tsf.2012.07.130
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发表时间：
2012-10-01
期刊：
影响因子：
2.1
通讯作者：
Lee, Changhee
中科院分区：
文献类型：
--
作者：
Kwak, Jeonghun;Lyu, Yi-Yeol;Lee, Changhee
用体积较大的菲（N，N'-二（萘-1-基）-N'-二（菲-9-基）联苯-4,4'-二胺，NPhenD）或蒽（N，N'-二（蒽-9-基）-N，N'-二（萘-1-基）联苯-4,4'-二胺，NAD）取代4,4'-双[N-（萘-1-基）]-联苯（α - npd）的苯基，合成了具有高玻璃化转变温度（T-g近似于200℃）的双空穴输运材料。使用这些空穴传输材料的有机发光二极管（oled）在高达420 K的高温下表现出稳定的工作性能，由于其高T-g，与传统空穴传输材料相比，器件寿命延长，工作电压变化减少。虽然NAD作为空穴传输材料具有相当小的带隙，但NPhenD和NAD优越的热性能表明它们可以成为高度稳定和高温耐用的oled和其他有机光电器件的有前途的材料。(C) 2012 Elsevier B.V.版权所有
Two hole transport materials with high glass transition temperatures (T-g similar to 200 degrees C) have been synthesized by replacing the phenyl groups of 4,4'-bis[N-(1-naphthyl-1)-N'-phenyl-amino]-biphenyl (alpha-NPD) with the bulkier phenanthrene (N,N'-di(naphthalene-1-yl)-N,N'-di(phenanthrene-9-yl)biphenyl-4,4'-diamine, NPhenD) or anthracene (N,N'-di(anthracene-9-yl)-N,N'-di(naphthalene-1-yl)biphenyl-4,4'-diamine, NAD). The organic light-emitting diodes (OLEDs) using these hole transport materials exhibited stable operation at high temperatures up to 420 K, improved device lifetimes, and reduced operating voltage changes compared to the conventional hole transport materials owing to their high T-g. Although NAD has quite small bandgap as a hole transport material, superior thermal properties of NPhenD and NAD suggest that they can be promising materials for highly stable and high temperature-durable OLEDs and other organic optoelectronic devices. (C) 2012 Elsevier B.V. All rights reserved.