Effects of Ca ∶ Al Alloy as Cathode on the Performance of Organic Light-Emitting Devices

XI Jian-fei; ZHANG Fang-hui; MA Ying; YAN Hong-gang; LIU Ding-han; JIANG Qian

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Effects of Ca ∶ Al Alloy as Cathode on the Performance of Organic Light-Emitting Devices

Device Technology & Physics | 更新时间：2020-08-12

- Effects of Ca ∶ Al Alloy as Cathode on the Performance of Organic Light-Emitting Devices
- Chinese Journal of Liquid Crystals and Displays Vol. 25, Issue 3, Pages: 355-359(2010)
- 作者机构：
  
  陕西科技大学电气与信息工程学院, 陕西西安 710021,E-mail:xjf605@yahoo.com.cn
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN383+.1
- Received：31 October 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 June 2010，
  
  Published：30 June 2010
- 稿件说明：
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席俭飞;张方辉;马颖;阎洪刚;刘丁菡;蒋谦. 钙铝合金作为阴极对OLED器件性能的影响[J]. 液晶与显示, 2010,25(3): 355-359

XI Jian-fei;ZHANG Fang-hui;MA Ying;YAN Hong-gang;LIU Ding-han;JIANG Qian. Effects of Ca ∶ Al Alloy as Cathode on the Performance of Organic Light-Emitting Devices[J]. 液晶与显示, 2010,25(3): 355-359
席俭飞;张方辉;马颖;阎洪刚;刘丁菡;蒋谦. 钙铝合金作为阴极对OLED器件性能的影响[J]. 液晶与显示, 2010,25(3): 355-359 DOI：

XI Jian-fei;ZHANG Fang-hui;MA Ying;YAN Hong-gang;LIU Ding-han;JIANG Qian. Effects of Ca ∶ Al Alloy as Cathode on the Performance of Organic Light-Emitting Devices[J]. 液晶与显示, 2010,25(3): 355-359 DOI：

摘要

为了研究阴极材料对有机电致发光器件的影响

在不改变其他功能层的情况下

分别采用不同比例的Ca/Al合金和纯Al作为器件的阴极制备了4种绿光OLED器件

器件结构分别为:ITO/2T-NATA(15 nm)/NPB(25 nm)/Alq

∶ C545T(20 nm)/Alq

(30 nm)/Ca(

%) ∶ Al(100 nm)和ITO/2T-NATA(15 nm)/NPB(25 nm)/Alq

∶ C545T(20 nm)/Alq

(30 nm)/Al(100 nm)。从电流-电压、电压-亮度、器件的外量子效率和光谱特性等几个方面

对不同比例的Ca/Al合金作为阴极的器件与Al作为阴极的器件进行了对比分析

发现当Ca的质量分数为10%时

器件的亮度达到最大值10 100 cd/m

并且器件的效率最高。对上述现象产生的原因进行了探讨

分析了器件光谱与不同阴极和不同驱动电流间的关系

从机理上阐述了OLED器件阴极的选取准则。

Abstract

Effects of different cathode materials on OLEDs were researched in this paper. On the condition of the same function layers

five kinds OLEDs were prepared by using Al and Ca ∶ Al alloy (several alloys with different proportion of Ca and Al are adopted) as cathode with the structure of ITO/2T-NATA(15 nm)/NPB(25 nm)/Alq

∶ C545T(20 nm)/Alq

(30 nm)/Ca(

%) ∶ Al(100 nm) and ITO/2T-NATA(15 nm)/NPB(25 nm)/Alq

∶ C545T(20 nm)/Alq

(30 nm)/Al(100 nm).Current-voltage characteristic

luminescent-voltage characteristic

outer quantum efficiency

spectrogram characteristic of the devices were analyzed respectively. It is found that brightness of the device which was applied 10% Ca ∶ Al alloys as cathode reached the maximum value of 10 100 cd/m

and the best excellent efficiency. Spectrogram of devices with different Ca ∶ Al alloys as cathode

and spectrogram of devices with different drive current were discussed. Finally

how to choose cathode of OLEDs was described in theory.

关键词

Keywords

references

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