Kim Youngkyoo
Organic Nanoelectronics Laboratory, Department of Chemical Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea.
Nanotechnology. 2008 Sep 3;19(35):355207. doi: 10.1088/0957-4484/19/35/355207. Epub 2008 Jul 21.
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.
本研究报告了一种幂律型电子注入模型，该模型解释了用作磷光有机发光二极管（PHOLED）中电子注入层的氟化锂（LiF）纳米层的厚度效应。制备了一系列具有不同LiF厚度的PHOLED，以研究LiF纳米层厚度对器件电流的影响。PHOLED仅通过0.2nm的厚度变化就表现出明显变化的电子电流。器件电流作为LiF厚度的函数很好地遵循了本研究提出的幂律模型，从中提取了一个表明电子注入材料固有性质的物理常数。
