Top-emitting White Organic Light-emitting Diodes with Red Color Conversion Layers

CHEN Shuang-wen; WANG Zhen; Zhou Xiang

doi:10.3788/fgxb20113206.0576

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Top-emitting White Organic Light-emitting Diodes with Red Color Conversion Layers

paper | 更新时间：2020-08-12

- Top-emitting White Organic Light-emitting Diodes with Red Color Conversion Layers
- Chinese Journal of Luminescence Vol. 32, Issue 6, Pages: 576-580(2011)
- 作者机构：
  
  中山大学光电材料与技术国家重点实验室,广东广州,510275
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113206.0576
  CLC： TN383.1;TN873.3
- Received：06 January 2011，
  
  Revised：02 March 2011，
  
  Published Online：22 June 2011，
  
  Published：22 June 2011
- 稿件说明：
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陈双文, 王振, 周翔. 红光颜色转换层调节的顶发射有机白光器件[J]. 发光学报, 2011,32(6): 576-580

CHEN Shuang-wen, WANG Zhen, ZHOU Xiang. Top-emitting White Organic Light-emitting Diodes with Red Color Conversion Layers[J]. Chinese Journal of Luminescence, 2011,32(6): 576-580
陈双文, 王振, 周翔. 红光颜色转换层调节的顶发射有机白光器件[J]. 发光学报, 2011,32(6): 576-580 DOI： 10.3788/fgxb20113206.0576.

CHEN Shuang-wen, WANG Zhen, ZHOU Xiang. Top-emitting White Organic Light-emitting Diodes with Red Color Conversion Layers[J]. Chinese Journal of Luminescence, 2011,32(6): 576-580 DOI： 10.3788/fgxb20113206.0576.

摘要

采用倒置结构顶发射蓝光器件和非掺杂型红光染料NPAMLI制备了TWOLED

研究了器件结构和光电性能的关系

器件结构为Glass/Al/Cs

/Alq

/AND/NPB/MoO

/Au/Alq

/NPAMLI。NPAMLI的吸收谱与ADN的发光谱有较大的重叠

NPAMLI能够吸收ADN发出的部分蓝光并发射红光。实验中改变NPAMLI的厚度来调节器件发光颜色

当NPAMLI的厚度为300 nm时

器件的最高效率为1.25 cd/A (0.71 lm/W)

发光色坐标为(0.330

0.292)。

Abstract

Top-emitting white organic light-emitting diodes (TWOLEDs) have attracted intensive attention due to their great potential for high-resolution full color active matrix display and lighting applications. We have investigated optical and electrical characteristics of the TWOLED combining electroluminescence (EL) of blue material (ADN) with top color conversion layer (CCL) based on non-doped red material (NPAMLI). The TWOLED

with structure of Glass substrate/Al/Cs

/Alq

/ADN/NPB/MoO

/Au/Alq

/NPAMLI

was fabricated by vacuum thermal evaporation. The 10 nm thick Au was used as top semitransparent anode

the 40 nm thick Alq

was used as a capping layer to improve the light out-coupling

and the non-doped red material NPAMLI was used as the CCL. The NPAMLI CCL showed strong absorption from 450 nm to 550 nm

which matched well with the emission of the ADN. The EL spectra of the TWOLED additionally contained a red component from NPAMLI

which absorbed a part of the blue EL of the ADN

and converted this to its red fluorescence. Therefore

the TWOLED yielded a white light emission resulting from final mixture of color-converted red light and unabsorbed blue light. The TWOLED with a peak current (power) efficiency of 1.25 cd/A (0.71 lm/W)

CIE coordinates of (0.330

0.292)

and a color rendering index of around 87.5

has been obtained.

关键词

Keywords

references

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