Efficient, long-life and Lambertian source of top-emitting white OLEDs using low-reflectivity molybdenum anode and co-doping technology

被引：36

作者：

Lee, Meng-Ting ^{[1
]}

Tseng, Mei-Rurng ^{[1
]}

机构：

[1] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 310, Taiwan

来源：

CURRENT APPLIED PHYSICS | 2008年 / 8卷 / 05期

关键词：

top-emitting OLED; white OLED; microcavity effect; molybdenum; co-doping;

D O I：

10.1016/j.cap.2007.11.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A top-emitting white organic electroluminescent device (TWOLED) established on low-reflectivity molybdenum (Mo) anode (R similar to 58% in visible range) for alleviating the undesirable microcavity effect and achieving broad as well as similar emission spectra at different viewing angles has been demonstrated based on a dual-layer emitter composed of doped blue and yellow dopant in the same blue host. The electroluminescent (EL) efficiency and operational lifetime of TWOLED can be further enhanced by a factor of 1.2 and 3.4, respectively, when a co-doping technology of adding another blue dopant into the yellow emitter was incorporated. The enhanced efficiency is attributed to the improved energy transfer from blue host to yellow dopant by cascade process. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：616 / 619

页数：4

共 14 条

[1]

ALI TA, 2007, P SOC INF DIS CAL, P1691

[2]

CHUNG K, 2006, P SOC INF DIS SAN FR, P1958

[3] MICROCAVITY EFFECTS IN ORGANIC SEMICONDUCTORS [J].

DODABALAPUR, A ;

ROTHBERG, LJ ;

MILLER, TM ;

KWOCK, EW .

APPLIED PHYSICS LETTERS, 1994, 64 (19) :2486-2488

[4] Red organic light-emitting diodes using an emitting assist dopant [J].

Hamada, Y ;

Kanno, H ;

Tsujioka, T ;

Takahashi, H ;

Usuki, T .

APPLIED PHYSICS LETTERS, 1999, 75 (12) :1682-1684

[5]

HASEGAWA T, 2004, P SOC INF DISPL SEAT, P154

[6] Highly efficient top-emitting white organic electroluminescent devices [J].

Hsu, SF ;

Lee, CC ;

Hwang, SW ;

Chen, CH .

APPLIED PHYSICS LETTERS, 2005, 86 (25) :1-3

[7]

IKEDA H, 2006, P SOC INF DIS SAN FR, P923

[8] High-efficiency top-emissive white-light-emitting organic electrophosphorescent devices [J].

Kanno, H ;

Sun, Y ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 2005, 86 (26) :1-3

[9]

KASHIWABARA M, 2004, P SOC INF DIS SEATTL, P1017

[10] Neural signal recording using microelectrode arrays fabricated on liquid crystal polymer material [J].

Lee, CJ ;

Oh, SJ ;

Song, JK ;

Kim, SJ .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2004, 24 (1-2) :265-268

← 1 2 →