Improvement in power efficiency in organic light emitting diodes through intermediate Mg:Ag layer in LiF/Mg:Ag/Al cathodes

被引：8

作者：

Kim, Sung Hyun

Jang, Jyongsik

Lee, Jun Yeob

机构：

[1] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151, South Korea

[2] Dankook Univ, Dept Polymer Sci & Engn, Seoul 140714, South Korea

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 10期

关键词：

D O I：

10.1149/1.2756337

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Effects of Mg:Ag interlayer between LiF and Al on electron injection and device performances of organic light-emitting diodes (OLEDs) were investigated. Thickness of Mg:Ag layer was changed from 0 to 10 nm and the relationship between interlayer thickness and device performances was studied. Current density of OLEDs was increased due to efficient electron injection from cathode to organic layer by Mg:Ag interlayer. In addition, power efficiency of OLEDs was improved by more than 50% due to low driving voltage and high recombination efficiency and it showed a maximum value at a Mg: Ag thickness of 1.0 nm. (c) 2007 The Electrochemical Society.

引用

收藏

页码：J117 / J119

页数：3

相关论文

共 9 条

[1] Electronic line-up in light-emitting diodes with alkali-halide/metal cathodes [J].

Brown, TM ;

Friend, RH ;

Millard, IS ;

Lacey, DJ ;

Butler, T ;

Burroughes, JH ;

Cacialli, F .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :6159-6172

[2] Mechanisms of injection enhancement in organic light-emitting diodes through an Al/LiF electrode [J].

Heil, H ;

Steiger, J ;

Karg, S ;

Gastel, M ;

Ortner, H ;

von Seggern, H ;

Stössel, M .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (01) :420-424

[3] Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode [J].

Hung, LS ;

Tang, CW ;

Mason, MG .

APPLIED PHYSICS LETTERS, 1997, 70 (02) :152-154

[4] High efficiency organic light-emitting devices with Al/NaF cathode [J].

Lee, J ;

Park, Y ;

Kim, DY ;

Chu, HY ;

Lee, H ;

Do, LM .

APPLIED PHYSICS LETTERS, 2003, 82 (02) :173-175

[5] Interfacial chemistry of Alq3 and LiF with reactive metals [J].

Mason, MG ;

Tang, CW ;

Hung, LS ;

Raychaudhuri, P ;

Madathil, J ;

Giesen, DJ ;

Yan, L ;

Le, QT ;

Gao, Y ;

Lee, ST ;

Liao, LS ;

Cheng, LF ;

Salaneck, WR ;

dos Santos, DA ;

Brédas, JL .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (05) :2756-2765

[6] Improved performance and stability of organic light-emitting devices with silicon oxy-nitride buffer layer [J].

Poon, CO ;

Wong, FL ;

Tong, SW ;

Zhang, RQ ;

Lee, CS ;

Lee, ST .

APPLIED PHYSICS LETTERS, 2003, 83 (05) :1038-1040

[7] NaCl/Ca/Al as an efficient cathode in organic light-emitting devices [J].

Shi, Shengwei ;

Ma, Dongge .

APPLIED SURFACE SCIENCE, 2006, 252 (18) :6337-6341

[8] Organic EL cells using alkaline metal compounds as electron injection materials [J].

Wakimoto, T ;

Fukuda, Y ;

Nagayama, K ;

Yokoi, A ;

Nakada, H ;

Tsuchida, M .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 1997, 44 (08) :1245-1248

[9] Experimental study of a chemical reaction between LiF and Al [J].

Wang, SD ;

Fung, MK ;

Lai, SL ;

Tong, SW ;

Lee, CS ;

Lee, ST ;

Zhang, HJ ;

Bao, SN .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (01) :169-173