Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED

LI Huai-kun; ZHANG Fang-hui; CHENG Jun; DING Lei

doi:10.3788/fgxb20163701.0038

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Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED

更新时间：2020-08-12

- Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED
- Chinese Journal of Luminescence Vol. 37, Issue 1, Pages: 38-43(2016)
- 作者机构：
  
  陕西科技大学理学院,陕西西安,710021
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163701.0038
  CLC： TN383+.1
- Received：17 August 2015，
  
  Revised：15 October 2015，
  
  Published：10 January 2016
- 稿件说明：
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李怀坤, 张方辉, 程君等. BPhen作为发光层间隔层对黄光OLED的影响[J]. 发光学报, 2016,37(1): 38-43

LI Huai-kun, ZHANG Fang-hui, CHENG Jun etc. Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED[J]. Chinese Journal of Luminescence, 2016,37(1): 38-43
李怀坤, 张方辉, 程君等. BPhen作为发光层间隔层对黄光OLED的影响[J]. 发光学报, 2016,37(1): 38-43 DOI： 10.3788/fgxb20163701.0038.

LI Huai-kun, ZHANG Fang-hui, CHENG Jun etc. Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED[J]. Chinese Journal of Luminescence, 2016,37(1): 38-43 DOI： 10.3788/fgxb20163701.0038.

摘要

使用R-4B和GIrl作为磷光掺杂剂、CBP为主体、BPhen为发光层间隔层

制备了包含红、绿双发光层的黄色磷光OLED器件。器件结构为ITO/MoO

(40 nm)/NPB(40 nm)/TCTA(10 nm)/CBP:GIrl(14%)(20 nm)/BPhen(

nm)/CBP:R-4B(6%)(10 nm)/BCP(10 nm)/Alq

(40 nm)/LiF(1 nm)/Al(1 000 nm)。BPhen位于两发光层之间

具有调节载流子复合的功能

其中

为BPhen的厚度。通过调整

的值

研究了BPhen厚度对OLED器件发光性能的影响。实验结果表明

适当厚度的BPhen层可以提高器件的发光亮度和电流效率。BPhen厚度为6 nm的器件性能最佳

16 V驱动电压下的器件亮度最高可达11 270 cd/m

最大电流效率为24.35 cd/A

而且绿光和红光波峰强度相近

黄光颜色纯正

色坐标趋近于(0.5

0.5)。

Abstract

We prepared yellow phosphorescent OLED devices

which used R-4B

GIrl as the green phosphorescent dopant

CBP as the main body material. We investigated the BPhen as spacer layer between the red and green emitting layers to regulate currieries recombination. The device structure was ITO/MoO

(40 nm)/NPB(40 nm)/TCTA(10 nm)/CBP:GIrl(14%)(20 nm)/BPhen(

nm)/CBP:R-4B(6%)(10 nm)/BCP(10 nm)/Alq

(40 nm)/LiF(1 nm)/Al (1 000 nm). In this structure

referred to six different thickness of BPhen in the devices. We studied its luminescent properties and controlled its spectra by adjusting the thickness of BPhen. The results show that appropriate thickness of BPhen can improve the performance of the device. When the thickness of BPhen is 6 nm

the performance of the device is the optimum. The maximum brightness is 11 270 cd/m

at 16 V

and the maximum efficiency is 24.35 cd/A. Meanwhile

the green and red peaks almost have the same intensity in the spectra which means the purest yellow of all devices

and the color coordinates close to (0.5

0.5).

关键词

Keywords

references

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