双电子传输层对有机发光二极管效率及其衰减的改善

陆勍; 陈炳月; 杨魏强; 张彤蕾; 吕昭月

doi:10.3788/fgxb20153609.1053

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双电子传输层对有机发光二极管效率及其衰减的改善

器件制备及器件物理 | 更新时间：2020-08-12

- 双电子传输层对有机发光二极管效率及其衰减的改善
- Improved Efficiency and Its Roll-off of Organic Light-emitting Diodes with Double Electron Transport Layers
- 发光学报 2015年36卷第9期页码：1053-1058
- 作者机构：
  
  华东理工大学理学院物理系上海,200237
- 作者简介：
- 基金信息：
  
  中央高校基本科研业务费专项资金(222201314022)();上海市大学生创新训练项目(S13047)资助()
- DOI：10.3788/fgxb20153609.1053
  中图分类号： TN383+.1
- 纸质出版日期：2015-9-3，
  
  收稿日期：2015-6-24，
  
  修回日期：2015-7-23，
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陆勍, 陈炳月, 杨魏强等. 双电子传输层对有机发光二极管效率及其衰减的改善[J]. 发光学报, 2015,36(9): 1053-1058

LU Qing, CHEN Bing-yue, YANG Wei-qiang etc. Improved Efficiency and Its Roll-off of Organic Light-emitting Diodes with Double Electron Transport Layers[J]. Chinese Journal of Luminescence, 2015,36(9): 1053-1058
陆勍, 陈炳月, 杨魏强等. 双电子传输层对有机发光二极管效率及其衰减的改善[J]. 发光学报, 2015,36(9): 1053-1058 DOI： 10.3788/fgxb20153609.1053.

LU Qing, CHEN Bing-yue, YANG Wei-qiang etc. Improved Efficiency and Its Roll-off of Organic Light-emitting Diodes with Double Electron Transport Layers[J]. Chinese Journal of Luminescence, 2015,36(9): 1053-1058 DOI： 10.3788/fgxb20153609.1053.

摘要

采用Bphen和BCP制成双电子传输层(Doubleelectrontransportlayers

DETLs)的有机发光二极管器件

与Bphen单独作ETL的器件相比

DETLs器件具有较小的空穴漏电流

效率提升10%。与BCP独自作ETL的器件相比

更多的电子注入使DETLs器件的效率在50~600mA/cm

的电流范围内没有衰减。BCP作ETL的器件的效率从50mA/cm

时的2.5cd/A衰减至300mA/cm

的2.1cd/A

衰减了16%。Cs

:BCP独自作ETL的器件效率在50~300mA/cm

的电流范围内衰减了30%

而Bphen/Cs

:BCP作DETLs的器件效率在50~600mA/cm

的电流范围内衰减幅度为0

原因是Bphen阻挡了Cs原子扩散至发光层。

Abstract

Efficiency and its roll-off are improved by using double electron transport layers (DETLs) in organic light-emitting diodes (OLEDs). When DETLs of Bphen/BCP are employed

device efficiency is enhanced by 10% compared to the device with single Bphen as an electron transport layer (ETL) because of lower hole leakage current. Meanwhile

due to more electrons injected

efficiency roll-off of 0% is observed for the Bphen/BCP-based device with the increase of current density from 50 to 600 mA/cm

. On the contrast

the device with single BCP as ETL has an efficiency roll-off of 16%

which is reduced from 2.5cd/A at 50 mA/cm

to 2.1cd/A at 300mA/cm

. Compared to the Cs

:BCP-ETL-based device with an efficiency roll-off of 30% from 50 to 300 mA/cm

device efficiency is declined by 0% within the range from 50 to 600 mA/cm

as DETLs of Bphen/Cs

:BCP are explored. The reason is the blocking of Cs atom interdiffusion into the emissive layer by the Bphen of Bphen/Cs

:BCP.

关键词

发光效率效率衰减电子传输层泄漏电流

Keywords

luminous efficiencyefficiency roll-offelectron transport layerleakage current

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