Electroluminescence and impedance analyses of organic light emitting diodes using anhydride materials as cathode interfacial layers

被引：10

作者：

Nam, Eunkyoung ^{[2
]}

Park, Hyungjun ^{[3
]}

Park, Keunhee ^{[2
]}

Moon, Mi Ran ^{[2
]}

Sohn, Sunyoung ^{[4
]}

Jung, Donggeun ^{[2
]}

Yi, Junsin ^{[3
]}

Chae, Heeyeop ^{[5
]}

Kim, Hyoungsub ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Dept Phys, Brain Korea Phys Res Div 21, Inst Basic Sci, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, Sch Informat & Commun Engn, Suwon 440746, South Korea

[4] Korea Basic Sci Inst, Jeonju 561756, South Korea

[5] Sungkyunkwan Univ, Dept Chem Engn, Suwon 440746, South Korea

来源：

THIN SOLID FILMS | 2009年 / 517卷 / 14期

关键词：

Cathode interfacial layer; PMDA; TMA; OLED; ELECTRON INJECTION; DEVICES; SPECTROSCOPY;

D O I：

10.1016/j.tsf.2009.02.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pyromellitic dianhydride (PMDA) and trimellitic anhydride (TMA) were tried as cathode interfacial layers between tris-(8-hydroxyquinoline) aluminum (Alq(3)) and Al in organic light emitting diodes (OLEDs). Both ultra-thin anhydride cathode interfacial layers improved the electroluminescence characteristics of OLEDs compared to those without any interfacial layer, and the PMDA interfacial layer showed the most significant enhancement of the device performance. According to impedance measurements and equivalent circuit analysis. the PMDA interfacial layer decreased the impedance, probably due to the increase in the injection efficiency of electrons from the Al cathode. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：4131 / 4134

页数：4

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