Influence of Light-emitting Layer Position on White Organic Light-emitting Diodes

XIANG Dong-xu; LI Hai-rong; XIE Long-zhen; YANG Jia-ming; WANG Fang; YUAN Chao-xin; SUN Yo

doi:10.3788/fgxb20153607.0821

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Influence of Light-emitting Layer Position on White Organic Light-emitting Diodes

更新时间：2020-08-12

- Influence of Light-emitting Layer Position on White Organic Light-emitting Diodes
- Chinese Journal of Luminescence Vol. 36, Issue 7, Pages: 821-828(2015)
- 作者机构：
  
  1. 兰州大学物理科学与技术学院微电子研究所,甘肃兰州,730000
  2. 兰州大学磁学与磁性材料教育部重点实验室,甘肃兰州,730000
  3. 特殊功能材料与结构设计教育部重点实验室上海,200050
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153607.0821
  CLC： TN383+.1
- Received：13 April 2015，
  
  Revised：05 May 2015，
  
  Published：03 July 2015
- 稿件说明：
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向东旭, 李海蓉, 谢龙珍等. 发光层位置对白光有机发光二极管的影响[J]. 发光学报, 2015,36(7): 821-828

XIANG Dong-xu, LI Hai-rong, XIE Long-zhen etc. Influence of Light-emitting Layer Position on White Organic Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(7): 821-828
向东旭, 李海蓉, 谢龙珍等. 发光层位置对白光有机发光二极管的影响[J]. 发光学报, 2015,36(7): 821-828 DOI： 10.3788/fgxb20153607.0821.

XIANG Dong-xu, LI Hai-rong, XIE Long-zhen etc. Influence of Light-emitting Layer Position on White Organic Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(7): 821-828 DOI： 10.3788/fgxb20153607.0821.

摘要

同一种主体材料MADN中混掺不同的掺杂剂

分别制备了两种白光有机发光二极管

测试并研究了它们的发光效率、寿命、发光亮度、电致发光光谱以及色平衡度。结果表明

两种白光器件的性能受发光层的顺序和厚度的影响显著。发光层顺序由阳极到阴极方向为橙/蓝的器件的稳定性要优于发光层顺序为蓝/橙的器件

这是由于橙光发光层中的rubrene对空穴的陷进作用可捕获穿越橙光发光层中的空穴

从而有效地调控了器件内部的电子、空穴浓度的平衡。通过对器件的优化

制得了色坐标为(0.320 1

0.345 9)的接近标准白光的有机电致发光器件。

Abstract

Two types of white organic light-emitting devices (WOLED) containing a layered light-emitting region composed of a single blue-emitting host and different fluorescent dopants (blue and orange) were fabricated. The efficiency

lifetime

brightness

spectral voltage-dependence and white balance of devices were investigated. The results show that the performance of the devices strongly depends on the stack order of two emitting layers and the thickness of the emitting layer. It is found that the WOLED with an EML sequence of orange/blue (from anode to cathode) shows better stability than that with an EML sequence of blue/orange. It is due to the rubrene in orange emitting layer that acts as hole-trap sites and captures the passing holes and hence balances the concentration of electrons and holes. The optimized white device exhibits a favorable CIE coordinates (0.320 1

0.345 9) which is close to the standard white light.

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references

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