Transparent organic light emitting diodes using a multilayer oxide as a composite cathode

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Transparent organic light emitting diodes using a multilayer oxide as a composite cathode

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- Transparent organic light emitting diodes using a multilayer oxide as a composite cathode
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 2, (2011)
- 作者机构：
  
  陕西科技大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 August 2011，
  
  Revised：06 September 2011，
  
  Published Online：14 September 2011，
  
  Published：06 April 2011
- 稿件说明：
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摘要

本文制备了一种采用多层氧化物复合阴极的透明OLED，器件结构为：ITO/ MoO3(10nm) /NPB(60nm) / Alq3(65nm)/ Al(1nm)/ MoO3(1nm)/Al(Xnm) /MoO3(30nm)。所采用的复合阴极结构为MoO3/Al/ MoO3 (MAM)，同时在复合阴极（MAM）与电子传输层（Alq3）中间插入一层厚度为1nm的Al中间层，该薄Al层一方面提高了电极与有机层间界面的平整度，同时增强电极的导电性；另一方面，在电子传输层与中间层Al薄膜之间形成了良好的欧姆接触，提高了电子的注入能力。接着对MAM结构中Al的厚度进行改变，获得该TOLEDs的最佳性能，在Al的厚度为18nm时器件亮度最高，为2297cd/cm2。

Abstract

Transparent organic light emitting diodes were developed by using a multilayer oxide as a composite cathode. The device structure is ITO/ MoO3(10nm) /NPB(60nm) / Alq3(65nm)/ Al(1nm)/MoO3(1nm)/ Al(Xnm) /MoO3(30nm).The composite cathode is MoO3/Al/ MoO3 (MAM). A thin Al layer (1nm) was introduced as an interlayer between the Alq3 electron transport layer and the MAM electrode. On the one hand

the thin Al improves the interface flatness between electrode and organic layers

while improving the conductivity of the electrode. On the other hand

electron injection was greatly improved by form an Ohmic contact between electron transport layer and a thin Al. Then we obtained the OLEDs optimum performance by changing the thickness of Al in MAM. In the thickness of 18nm about Al we can obtained the highest brightness is 2297cd/cm2.

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Transparent Organic Light Emitting Diodes Using a Multilayer Oxide as a Composite Cathode

Related Author

LIANG Tian-jing

ZHANG Fang-hai

DING Lei

Related Institution

School of Electric and Information Engineering, Shaanxi University of Science and Technology

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