The effect of various electrodes on the properties of electroluminescent devices with potassium chloride inside tris (8-hydroxyquinoline) aluminum

被引：4
作者：
Lue, Zhaoyue [1 ]
Deng, Zhenbo [1 ]
Chen, Zheng [1 ]
Yin, Yuehong [1 ]
Xu, Denghui [2 ]
Xiao, Jing [3 ]
Wang, Yongsheng [1 ]
机构：
[1] Beijing Jiaotong Univ, Inst Optoelect Technol, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China
[2] Beijing Technol & Business Univ, Dept Math & Phys, Beijing 100037, Peoples R China
[3] Taishan Univ, Phys & Elect Engn Coll, Tai An 271021, Shandong, Peoples R China
来源：
DISPLAYS | 2011年 / 32卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Electrode; Molybdenum trioxide; Potassium chloride; Trap site; Organic light-emitting diode; LIGHT-EMITTING-DIODES; MOLYBDENUM OXIDE; EFFICIENCY; STABILITY; LAYER;
D O I：
10.1016/j.displa.2011.01.004
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The performance of organic light-emitting diodes (OLED), based on NPB/Alq(3)/KCl/Alq(3) active regions, with various anode (i.e. ITO and ITO/MoO3) and cathode (i.e. Al and LiF/AI) structures is compared. NPB, Alq(3), KCl, ITO, MoO3, Al and LiF are N,N'-bis-(1-naphthl)-diphenyl-1,1'-biphenyl-4,4'-diamine, tris (8-hydroxyquinoline) aluminum, potassium chloride, indium-tin oxide, molybdenum trioxide, aluminum and lithium fluoride, respectively. When bare AI is used as a cathode, both luminance and efficiency are improved by the insertion of KCl inside Alq(3) (anode/NPB/Alq(3)/KCl/Alq(3)/Al), compared to a control device (anode/NPB/Alq(3)/Al). This is attributed to trap sites induced by KCl layer, which give a better recombination in the devices. However, if the cathode is LiF/AI, the performance of control device (anode/NPB/Alq3/LiF/Al) is superior to that of devices with KCl inside Alq(3) (anode/NPB/Alq(3)/KCl/Alq(3)/LiF/Al), which is attributed that the probability of electron injection from cathode is decreased. (C) 2011 Published by Elsevier B.V.
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页码：113 / 117
页数：5
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