Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

doi:10.1088/1674-1056/27/10/107801

中国物理B ›› 2018, Vol. 27 ›› Issue (10): 107801-107801.doi: 10.1088/1674-1056/27/10/107801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

Zhi-Qi Kou(寇志起), Yu Tang(唐宇), Li-Ping Yang(杨丽萍), Fei-Yu Yang(杨飞宇), Wen-Jun Guo(郭文军)

College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China

收稿日期:2018-05-23 修回日期:2018-07-06 出版日期:2018-10-05 发布日期:2018-10-05
通讯作者: Zhi-Qi Kou E-mail:usst102@aliyun.com

Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

Zhi-Qi Kou(寇志起), Yu Tang(唐宇), Li-Ping Yang(杨丽萍), Fei-Yu Yang(杨飞宇), Wen-Jun Guo(郭文军)

College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2018-05-23 Revised:2018-07-06 Online:2018-10-05 Published:2018-10-05
Contact: Zhi-Qi Kou E-mail:usst102@aliyun.com

摘要/Abstract

摘要：

A series of white phosphorescent OLED devices with buffer layer and multiple dopant structure is investigated in order to obtain better electro-optic performances and color stability. The color coordinate and color stability are related to the location of multiple dopants layer, and the optimized location can compensate for the change of the blue emission intensity under a high voltage and stabilize the spectrum. The electro-optic performances and color stability can be further improved by changing the composition and thickness of the buffer layer between the emitting layer and the electron transport layer. In device B2, the distance from multiple dopant layer to buffer layer is 2 nm and the thickness of buffer layer is 5 nm, the maximum luminance, current density, and power efficiency can reach 9091 cd/m², 364.5 mA/cm², and 26.74 lm/W, respectively. The variation of international commission on the illumination (CIE) coordinate of device B2 with voltage increasing from 4 V to 7 V is only (0.006, 0.004).

关键词: organic light emitting diodes, multiple dopants layer, buffer layer, color stability

Abstract:

Key words: organic light emitting diodes, multiple dopants layer, buffer layer, color stability

中图分类号: (Electroluminescence)

78.60.Fi

85.60.Jb (Light-emitting devices) 73.21.Ac (Multilayers)

寇志起, 唐宇, 杨丽萍, 杨飞宇, 郭文军. Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure[J]. 中国物理B, 2018, 27(10): 107801-107801.

Zhi-Qi Kou(寇志起), Yu Tang(唐宇), Li-Ping Yang(杨丽萍), Fei-Yu Yang(杨飞宇), Wen-Jun Guo(郭文军). Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure[J]. Chin. Phys. B, 2018, 27(10): 107801-107801.

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Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

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