Cs2CO3共蒸阴极对有机电致发光器件性能的影响

侯林涛; 王 平; 刘彭义; 张靖磊; 武春红; 李艳武; 吴 冰

doi:null

您当前的位置：

首页 >

文章列表页 >

Cs₂CO₃共蒸阴极对有机电致发光器件性能的影响

论文 | 更新时间：2020-08-12

- Cs₂CO₃共蒸阴极对有机电致发光器件性能的影响
- A Novel Electron Injection Layer with Co-evaporating Tris (8-hydroxyquinoline) Aluminum Doped Cesium Carbonate in Organic Light-emitting Diodes
- 发光学报 2010年31卷第5期页码：655-660
- 作者机构：
  
  暨南大学理工学院物理系,广东广州,510632
- 作者简介：
- 基金信息：
  
  Project supported by the Natural Science Foundation of Guangdong Province(8451063201
- DOI：
  中图分类号： TN383.1
- 收稿日期：2009-11-26，
  
  修回日期：2010-01-07，
  
  网络出版日期：2010-09-21，
  
  纸质出版日期：2010-09-21
- 稿件说明：
移动端阅览
侯林涛, 王平, 刘彭义, 张靖磊, 武春红, 李艳武, 吴冰. Cs2CO3共蒸阴极对有机电致发光器件性能的影响[J]. 发光学报, 2010,31(5): 655-660

HOU Lin-tao, WANG Ping, LIU Peng-yi, ZHANG Jing-lei, WU Chun-hong, LI Yan-wu, WU Bing. A Novel Electron Injection Layer with Co-evaporating Tris (8-hydroxyquinoline) Aluminum Doped Cesium Carbonate in Organic Light-emitting Diodes[J]. 发光学报, 2010,31(5): 655-660
侯林涛, 王平, 刘彭义, 张靖磊, 武春红, 李艳武, 吴冰. Cs2CO3共蒸阴极对有机电致发光器件性能的影响[J]. 发光学报, 2010,31(5): 655-660 DOI：

HOU Lin-tao, WANG Ping, LIU Peng-yi, ZHANG Jing-lei, WU Chun-hong, LI Yan-wu, WU Bing. A Novel Electron Injection Layer with Co-evaporating Tris (8-hydroxyquinoline) Aluminum Doped Cesium Carbonate in Organic Light-emitting Diodes[J]. 发光学报, 2010,31(5): 655-660 DOI：

摘要

研究了碳酸铯(Cs

)掺杂8-羟基喹啉铝(Alq

)作为电子注入层对有机电致发光器件性能的影响。结果表明

与常用的Cs

超薄层作电子注入层相比

∶ Alq

共蒸阴极对器件效率和亮度有很大提高

器件电流效率从3.1 cd/A (Cs

1 nm/Al)提高到6.5 cd/A (Cs

3% ∶ Alq

/Al)。器件性能的提高归因于Cs

∶ Alq

共蒸阴极比单层Cs

阴极具有更好的电子注入能力和电子传输性能。薄膜形貌表明

共蒸阴极能有效降低Alq

表面粗糙度

有助于提高器件发光性能及寿命。

Abstract

The electron injection mechanism of the effective cathode structure has been investigated

doping cesium carbonate (Cs

) into the organic electron-transport layer

which significantly enhances the electron injection in comparison with an ultra-thin Cs

injection layer

with a notable superiority in both luminance and efficiency. The results show that Cs

doped tris-(8-hydroxyquinoline) aluminum(Alq

) /Al cathode exhibits better electron injection efficiency than that in Cs

/Al bilayer cathode

thus a maximum current efficiency of 6.5 cd/A (3.1 cd/A for Cs

/Al) is obtained for 30% Cs

doping concentration device. It is proposed that this improved efficiency is related to the greatly enhanced electron injection at the Alq

∶ Cs

/Al cathode interface and efficient electron transport in the bulk of the Cs

∶ Alq

layer. The result from atomic force microscopy shows that with the insertion of Alq

∶ Cs

layer

the roughness of Alq

surface decreases

which is favorable to improve the device luminance and increase the device lifetime.

关键词

Keywords

references

Segal M, Singh M, Rivoire K, et al. Extrafluorescent electroluminescence in organic light-emitting devices

. Nature Mater., 2007, 6 (5):374-378.

Sun Y, Giebink N C, Kanno H, et al. Management of singlet and triplet excitons for efficient white organic light-emitting devices

. Nature, 2006, 440 (7086):908-912.

Cao Y, Yu G, Parker I D, et al. Ultrathin layer alkaline earth metals as stable electron-injecting electrodesfor polymer light emitting diodes

. J. Appl. Phys., 2000, 88 (6):3618-3623.

Hung L S, Tang C W, Mason M G. Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode

. Appl. Phys. Lett., 1997, 70 (2):152-154.

Piromreun P, Oh H, Shen Y, et al. Role of CsF on electron injection into a conjugated polymer

. Appl. Phys. Lett., 2000, 77 (15):2403-2405.

Yi Y, Kang S J, Cho K, et al. Origin of the improved luminance-voltage characteristics and stability in organic light-emitting device using CsCl electron injection layer

. Appl. Phys. Lett., 2005, 86 (21):213502-1-3.

Lee J, Park Y, Lee S K, et al. Tris-(8-hydroxyquinoline)aluminum-based organic light-emitting devices with Al-CaF2 cathode Performance enhancement and interface electronic structures

. Appl. Phys. Lett., 2002, 80 (17):3123-3125.

Cao Y, Yu G, Heeger A J, Efficient low operating voltage polymer light-emitting diodes with aluminum as the cathode material

. Adv. Mater., 1998, 10 (12):917-920.

Niu Y H, Ma H, Xu Q M, et al. High-efficiency light-emitting diodes using neutral surfactants and aluminum cathode

. Appl. Phys. Lett., 2005, 86 (8):083504-1-3.

Hou L T, Huang F, Peng J B, et al. Study of electrolumine scence and electron injection on novel red polyelectrolytes copolymer

. Acta Phys. Sin. (物理学报), 2007, 56 (10):6104-6108 (in Chinese).

Garcia A, Yang R Q, Jin Y, et al. Structure-function relationships of conjugated polyelectrolyte electron injection layers in polymer light emitting diodes

. Appl. Phys. Lett., 2007, 91 (15):153502-1-3.

Choudhury K R, Yoon J H, So F. LiF as an n-dopant in tris(8-hydroxyquinoline) aluminum thin films

. Adv. Mater., 2008, 20 (8):1456-1461.

Li Y, Zhang D Q, Duan L, et al. Elucidation of the electron injection mechanism of evaporated cesium carbonate cathode interlayer for organic light-emitting diodes

. Appl. Phys. Lett., 2007, 90 (1):012119-1-3.

Huang J S, Xu Z, Yang Y. Low-work-function surface formed by solution-processed and thermally deposited nanoscale layers of cesium carbonate

. Adv. Funct. Mater., 2007, 17 (2):1966-1973.

Matsushima T, Kinoshita Y, Murata H. Formation of Ohmic hole injection by inserting an ultrathin layer of molybdenum trioxide between indium tin oxide and organic hole-transporting layers

. Appl. Phys. Lett., 2007, 91 (25):253504-1-3.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

钙铝镁合金阴极对WOLED器件性能的影响

碳酸铯修饰Al作为反射阴极的倒置顶发射OLED器件

含吩噻嗪及其衍生物的聚合物有机电致发光材料的合成和器件制备