Effect of Ca and buffer layers on the performance of organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum

doi:10.1016/j.tsf.2010.01.045

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	Effect of Ca and buffer layers on the performance of organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum
	Shi, Shengwei; Ma, Dongge
刊名	THIN SOLID FILMS
	2010-06-30
卷号	518 期号:17 页码:4874-4878
关键词	Organic Light-emitting Diodes Buffer Layer Electron Injection
ISSN号	0040-6090
DOI	10.1016/j.tsf.2010.01.045
英文摘要	The effects of buffer layers, including LiF, LiCl, NaF, NaCl, NaI, KI, RbF, RbCl, CsF, CsCl, MgF(2), CaF(2), BaF(2), and BaCl(2) on electron injection and device performance in organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum, were investigated systematically. The insertion of the buffer layers at the organic/cathode interface not only reduced the operating voltage, but also enhanced the luminance and efficiency, which is attributed to the improvement of electron injection efficiency. It was found that the efficiency of the electron injection was closely related to the inherent properties of the buffer layer, such as its melting point (MP) and dielectric constant (epsilon), as well as with the buffer layer's interface with the metallic electrode through the effective work function (WF). Low MP, low epsilon and low WF values result in an effective improvement in the injection of the electrons, and thus to the device performance. The electroluminescent performance was further improved by the introduction of calcium between the buffer layer and the aluminum electrode. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000279566100021
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69035]
专题	中国科学院化学研究所
通讯作者	Shi, Shengwei
作者单位	Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Shi, Shengwei,Ma, Dongge. Effect of Ca and buffer layers on the performance of organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum[J]. THIN SOLID FILMS,2010,518(17):4874-4878.
APA	Shi, Shengwei,&Ma, Dongge.(2010).Effect of Ca and buffer layers on the performance of organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum.THIN SOLID FILMS,518(17),4874-4878.
MLA	Shi, Shengwei,et al."Effect of Ca and buffer layers on the performance of organic light-emitting diodes based on tris-(8-hydroxyquinoline) aluminum".THIN SOLID FILMS 518.17(2010):4874-4878.