High Efficiency Hybrid White Organic Light-emitting Diodes with Stable Emission Spectrum Based on Two Separately Monochromatic Emission Layers

FANG Da; ZHANG Zhi-qiang; WU Zhen-xuan; ZHANG Chuan; ZHANG Hong-mei

doi:10.3788/fgxb20173802.0201

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High Efficiency Hybrid White Organic Light-emitting Diodes with Stable Emission Spectrum Based on Two Separately Monochromatic Emission Layers

更新时间：2020-08-12

- High Efficiency Hybrid White Organic Light-emitting Diodes with Stable Emission Spectrum Based on Two Separately Monochromatic Emission Layers
- Chinese Journal of Luminescence Vol. 38, Issue 2, Pages: 201-206(2017)
- 作者机构：
  
  1. 南京邮电大学有机电子与信息显示国家重点实验室培育基地, 信息材料与纳米技术研究院, 江苏南京 210023
  2. 南京邮电大学江苏国家先进材料协同创新中心, 江苏南京 210023
  3. 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室, 吉林长春 130022
- 作者简介：
- 基金信息：
  
  Supported by Hundreds Talents Program of Chinese Academy of Sciences;National Science Fund for Distinguished Young Scholars of China (50325312);National Basic Research Program of China(973)(2009CB623604)
- DOI：10.3788/fgxb20173802.0201
  CLC： TN383.+1
- Received：07 July 2016，
  
  Revised：07 November 2016，
  
  Published：05 February 2017
- 稿件说明：
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方达, 张智强, 吴震轩等. 光谱稳定的互补色双发光层高效混合白光OLED[J]. 发光学报, 2017,38(2): 201-206

FANG Da, ZHANG Zhi-qiang, WU Zhen-xuan etc. High Efficiency Hybrid White Organic Light-emitting Diodes with Stable Emission Spectrum Based on Two Separately Monochromatic Emission Layers[J]. Chinese Journal of Luminescence, 2017,38(2): 201-206
方达, 张智强, 吴震轩等. 光谱稳定的互补色双发光层高效混合白光OLED[J]. 发光学报, 2017,38(2): 201-206 DOI： 10.3788/fgxb20173802.0201.

FANG Da, ZHANG Zhi-qiang, WU Zhen-xuan etc. High Efficiency Hybrid White Organic Light-emitting Diodes with Stable Emission Spectrum Based on Two Separately Monochromatic Emission Layers[J]. Chinese Journal of Luminescence, 2017,38(2): 201-206 DOI： 10.3788/fgxb20173802.0201.

摘要

利用两种颜色的发光层制备了光谱稳定的高效混合WOLED。其中蓝光发光层用14%质量分数的BNE掺杂在BePP

中，橙光发光层用1%质量分数的Ir（bt）

（acac）掺杂在49.5%质量分数的NPB和49.5%质量分数的BePP

组成的混合主体中。在不利用任何光耦合技术的条件下，器件在亮度为100 cd/m

时，功率效率可以达到39 lm/W；当亮度提高到1 000 cd/m

时，效率仅发生轻微滚降至27.5 lm/W。器件的光谱稳定，亮度在1 000 cd/m

和10 000 cd/m

时，CIE坐标分别为（0.37，0.48）和（0.37，0.47）。良好的光谱稳定性归结于设计的双极性中间层平衡了其两侧激子的产生。

Abstract

Highly efficient hybrid white organic light-emitting diode (WOLED) with stable emission spectrum was fabricated by using two separately monochromatic emission layers (EML). The blue emissive layer was based on 14%(mass fraction) trans-1

2-bis(6-(N

N-di-p-tolylamino)-Naphthalene-2-yl)ethene (BNE) doped in BePP

and the orange emissive layer was based on 1%(mass fraction) Ir(bt)

(acac) doped in a mixed-host of 49.5%(mass fraction) NPB and 49.5%(mass fraction) BePP

. Without the use of any outcoupling techniques

this device can achieve a power efficiency of 39 lm/W at brightness of 100 cd/m

and slightly rolls off to 27.5 lm/W at brightness of 1 000 cd/m

. There is nearly no color shift with the bias voltages as the Commission Internationale de L'Eclairage (CIE) coordinates are (0.37

0.48) and (0.37

0.47) at 1 000 cd/m

and 10 000 cd/m

respectively. The stable emission spectrum can be contributed to the well designed ambipolar interlayer which successfully balances the exciton generation evenly on its both sides.

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references

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