Efficient Inverted Top-emitting Organic Light-emitting Devices with Cesium Carbonate Modified Al Cathode

ZHANG Hao; WANG Li; RONG Jia-ling; CAO Jin; ZHANG Zhi-lin; JIANG Xue-yin; ZHANG Jian-hua

doi:10.3788/fgxb20123306.0611

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Efficient Inverted Top-emitting Organic Light-emitting Devices with Cesium Carbonate Modified Al Cathode

paper | 更新时间：2020-08-12

- Efficient Inverted Top-emitting Organic Light-emitting Devices with Cesium Carbonate Modified Al Cathode
- Chinese Journal of Luminescence Vol. 33, Issue 6, Pages: 611-615(2012)
- 作者机构：
  
  1. 上海大学新型显示技术与应用集成教育部重点实验室上海,200072
  2. 上海大学机电工程与自动化学院上海,200072
  3. 上海大学材料学院上海,200072
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123306.0611
  CLC： TN383+.1
- Received：09 March 2012，
  
  Revised：2012-4-23，
  
  Published Online：10 June 2012，
  
  Published：10 June 2012
- 稿件说明：
移动端阅览
张浩, 王立, 容佳玲, 曹进, 张志林, 蒋雪茵, 张建华. 碳酸铯修饰Al作为反射阴极的倒置顶发射OLED器件[J]. 发光学报, 2012,(6): 611-615

ZHANG Hao, WANG Li, RONG Jia-Ling, CAO Jin, ZHANG Zhi-Lin, JIANG Xue-Yin, ZHANG Jian-Hua. Efficient Inverted Top-emitting Organic Light-emitting Devices with Cesium Carbonate Modified Al Cathode[J]. Chinese Journal of Luminescence, 2012,(6): 611-615
张浩, 王立, 容佳玲, 曹进, 张志林, 蒋雪茵, 张建华. 碳酸铯修饰Al作为反射阴极的倒置顶发射OLED器件[J]. 发光学报, 2012,(6): 611-615 DOI： 10.3788/fgxb20123306.0611.

ZHANG Hao, WANG Li, RONG Jia-Ling, CAO Jin, ZHANG Zhi-Lin, JIANG Xue-Yin, ZHANG Jian-Hua. Efficient Inverted Top-emitting Organic Light-emitting Devices with Cesium Carbonate Modified Al Cathode[J]. Chinese Journal of Luminescence, 2012,(6): 611-615 DOI： 10.3788/fgxb20123306.0611.

摘要

以Cs

修饰的Al电极作为反射阴极制备了高效倒置顶发射结构有机电致发光器件(ITOLED)。以八羟基喹啉铝(Alq

)作为发光层、MoO

修饰的Ag为半透明阳极时

器件的开启电压为3.6 V

发光效率和功率效率分别达到9.8 cd/A和3.4 lm/W。研究结果表明

Al/Cs

为反射阴极的器件性能明显高于使用Mg:Ag(4.2 V

8.6 cd/A

2.85 lm/W)和Al(5 V

5.5 cd/A

1.57 lm/W)作为反射阴极的倒置顶发射OLED器件。单电子器件研究结果证明

以Cs

修饰的Al电极功函数明显低于Mg:Ag和Al电极

具有更好的电子注入效果。因此

除去微腔效应外

Al/Cs

为反射电极的ITOLED器件性能的提高主要归因于Al/Cs

阴极的有效电子注入。

Abstract

Efficient inverted top-emitting organic light-emitting diode(ITOLED) using a thin Cs

layer modified Al as the reflective bottom cathode is demonstrated. With tris-(8-hydroxy-quinoline) aluminum (Alq

) as emitting layer and MoO

/Ag as semitransparent anode

the Al/Cs

based ITOLED shows a tune-on voltage of 3.6 V

luminance efficiency of 9.8 cd/A and 3.4 lm/W

which are much better than those (4.2 V

8.6 cd/A

2.85 lm/W) obtained from Mg:Ag based ITOLED and those (5 V

5.5 cd/A

1.57 lm/W) obtained from bare Al based ITOLED. Electron-only devices research shows that a stronger electron-injection is obtained from Al/Cs

than Mg:Ag and Al

which is attributed to the lower work function of Al/Cs

than Mg:Ag and Al. The good performance of Al/Cs

based ITOLED is attributed to the efficient electron injection from the Al/Cs

cathode as well as a microcavity effect.

关键词

Keywords

references

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