Effects of Ca/Al/Mg Alloy as Cathode on The Performance of White Organic Light-emitting Devices

WANG Lu-wei; ZHANG Fang-hui

doi:10.3788/fgxb20153612.1422

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Effects of Ca/Al/Mg Alloy as Cathode on The Performance of White Organic Light-emitting Devices

更新时间：2020-08-12

- Effects of Ca/Al/Mg Alloy as Cathode on The Performance of White Organic Light-emitting Devices
- Chinese Journal of Luminescence Vol. 36, Issue 12, Pages: 1422-1426(2015)
- 作者机构：
  
  陕西科技大学电气与信息工程学院,陕西西安,710021
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153612.1422
  CLC： TN383+.1
- Received：21 August 2015，
  
  Revised：15 October 2015，
  
  Published：10 December 2015
- 稿件说明：
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王璐薇, 张方辉,. 钙铝镁合金阴极对WOLED器件性能的影响[J]. 发光学报, 2015,36(12): 1422-1426

WANG Lu-wei, ZHANG Fang-hui,. Effects of Ca/Al/Mg Alloy as Cathode on The Performance of White Organic Light-emitting Devices[J]. Chinese Journal of Luminescence, 2015,36(12): 1422-1426
王璐薇, 张方辉,. 钙铝镁合金阴极对WOLED器件性能的影响[J]. 发光学报, 2015,36(12): 1422-1426 DOI： 10.3788/fgxb20153612.1422.

WANG Lu-wei, ZHANG Fang-hui,. Effects of Ca/Al/Mg Alloy as Cathode on The Performance of White Organic Light-emitting Devices[J]. Chinese Journal of Luminescence, 2015,36(12): 1422-1426 DOI： 10.3788/fgxb20153612.1422.

摘要

采用Ca/Al/Mg合金作为器件的阴极

基于红绿/蓝双发光层制作了6种白色磷光OLED器件

器件结构为ITO/MoO

(30 nm)/NPB (40 nm)/mCP:Firpic (8%

40 nm)/CBP:R-4B (2%):Ir(ppy)

(14%

5 nm)/TPBi (10 nm)/Alq

(40 nm)/Ca:Al:Mg (

100 nm) (

25)。通过改变Mg的掺杂比例

研究了不同比例的Ca/Al/Mg合金阴极对器件性能的影响。结果表明:Mg质量分数为15%的Ca/Al/Mg阴极具有良好的电子注入特性

有效改善了器件的发光特性

最大发光亮度可达1 504 cd/m

效率达到最大值14.3 cd/A

色坐标接近(0.46

0.42)。

Abstract

Based on the red and green/blue light emitting layer

six white phosphorescent OLEDs are fabricated by using Ca/Al/Mg alloy as cathode

and the effects of different proportion of Ca/Al/Mg alloy on OLEDs are researched by changing the doping ratio of Mg. The device structures are as follows: ITO/MoO

(30 nm)/NPB(40 nm)/mCP:Firpic(8%)(40 nm)/CBP:R-4B(2%):Ir(ppy)

(14%)(5 nm)/TPBi(10 nm)/Alq

(40 nm)/Ca:Al:Mg(

%)(100 nm)(

25). The experiment results show that the cathode with Mg mass fraction of 15% has good electron injection characteristics which can effectively improve the light-emitting characteristics of the device. The maximum brightness is 1 504 cd/m

the maximum current efficiency is 14.3 cd/A

and the color coordinates is close to (0.46

0.42).

关键词

Keywords

references

Ling D G. Effect of Coupled Structures Cathode and Thin Organic Layer on The Performance of OLED [D]. Beijing: Beijing Jiaotong University, 2009 (in Chinese).

Wu J. The Model of Carriers' Transport and Recombination in OLED and A Study on Phosphorescent Dye Doped OLED [D]. Jinan: University of Jinan, 2007 (in Chinese).

Zhao F C. Luminescence Characteristics of OLED with Phosphor-doped Host-quest Structure [D]. Baoding: Hebei University, 2009 (in Chinese).

Lai S L, Chan M Y, Lee C S, et al. Investigation of calcium as high performance cathode in small-molecule based organic light-emitting devices [J]. Appl. Phys., 2003, 94:7297-7299.

Liu Q. Research on electron Injection Materials for Organic Light-emitting Diodes and The Related Mechanisms [D]. Beijing: Tsinghua University, 2009 (in Chinese).

Kim S H, Yoon J H, Jang J, et al. Effect of calcium interlayer thickness on electron injection of lithium quinolate/Ca/Al cathodes [J]. Appl. Surf. Sci., 2008, 254(21):7061-7063.

Xie K. Research on Cathodes for Organic Light-emitting Diodes and The Related Mechanism [D]. Beijing: Tsinghua University, 2012 (in Chinese).

Chen J M, Chen J D, Wu Z F. White OLED Lighting [M]. Shanghai: Shanghai Jiao Tong University Press, 2011 (in Chinese).

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