Power-law-type electron injection through lithium fluoride nanolayers in phosphorescence organic light-emitting devices
Power-law-type electron injection through lithium fluoride nanolayers in phosphorescence organic light-emitting devices
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DOI：
10.1088/0957-4484/19/35/355207
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发表时间：
2008-09-03
期刊：
影响因子：
3.5
通讯作者：
Kim, Youngkyoo
中科院分区：
文献类型：
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作者：
Kim, Youngkyoo
本文报道了用于磷光有机电致发光器件(PHOLED)中作为电子注入层的氟化锂(LiF)纳米层的厚度效应的幂函数型电子注入模型。为了研究LiF纳米层厚度对器件电流的影响，制备了一系列不同LiF厚度的PHOLED。PHOLED显示出明显的电子电流变化，厚度变化仅为0.2 nm。器件电流与LiF厚度的函数关系很好地符合本研究中提出的幂定律模型，从该模型中提取了一个反映电子注入材料本征性质的物理常数。
This work reports a power-law-type electron injection model that accounts for the thickness effect of lithium fluoride (LiF) nanolayers used as an electron injection layer in phosphorescence organic light-emitting devices (PHOLEDs). A series of PHOLEDs were fabricated with various LiF thicknesses in order to investigate the influence of LiF nanolayer thickness on the device current. The PHOLEDs exhibited pronouncedly changed electron currents by only 0.2 nm thickness variation. The device current as a function of LiF thickness excellently followed the power-law model proposed in this study, from which a physical constant indicating the intrinsic nature of electron injection materials has been extracted.