Organic light emitting diodes using NaCl:N,N′-bis(naphthalene-1-yl)-N,N′-bis(phenyl)benzidine composite as a hole injection buffer layer
Organic light emitting diodes using NaCl:N,N′-bis(naphthalene-1-yl)-N,N′-bis(phenyl)benzidine composite as a hole injection buffer layer
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DOI：
10.1063/1.3509150
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发表时间：
2010-11
影响因子：
3.2
通讯作者：
Jeongho Kim;Myungseop Kim;Jeong Won Kim;Y. Yi;Heon Kang
中科院分区：
文献类型：
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作者：
Jeongho Kim;Myungseop Kim;Jeong Won Kim;Y. Yi;Heon Kang
在阳极/有机物界面上添加N，N′-双（萘-1-基）-N，N′-双（苯基）联苯胺（NPB）和NaCl的复合缓冲层，可以有效地增强铟锡氧化物阳极向NPB空穴传输层（HTL）的空穴注入.观察到两个最大值的显着电流注入相对于组成的变化，这意味着多个注入机制的隧道效应和其他界面效应。从更长的操作寿命来看，与用铜酞菁作为空穴注入层的标准器件相比，也证实了增强的器件稳定性。这些结果部分归因于从原子力显微镜测量观察到的阳极和HTL之间经由复合缓冲剂的更好的机械接触。
Composite buffer layers of N,N′-bis(naphthalene-1-yl)-N,N′-bis(phenyl)benzidine (NPB) and NaCl at the anode/organic interface were found to be very effective on the hole injection enhancement from an indium tin oxide anode to the hole-transport layer (HTL) of NPB. Two maxima of significant current injection with respect to compositional variation were observed, implying multiple injection mechanisms of the tunneling effect and other interfacial effects. From a longer operation lifetime, the enhanced device stability was also confirmed as compared with a standard device with copper phthalocyanine as the hole injection layer. Those results are partly attributed to the better mechanical contact between anode and HTL via the composite buffer, observed from atomic force microscopy measurement.