LiF修饰阴极的双层有机电致发光器件的延时效应

王俊西; 李宏建; 熊志勇; 徐仁伯; 李雪勇

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LiF修饰阴极的双层有机电致发光器件的延时效应

论文 | 更新时间：2020-08-12

- LiF修饰阴极的双层有机电致发光器件的延时效应
- Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode
- 发光学报 2010年31卷第1期页码：17-24
- 作者机构：
  
  1. 中南大学材料科学与工程学院
  2. 中南大学物理科学与技术学院
- 作者简介：
  
  [ "" ]
- 基金信息：
- DOI：
  中图分类号： TN383.1;TN873.3
- 收稿日期：2009-03-30，
  
  修回日期：1900-01-02，
  
  网络出版日期：2010-02-20，
  
  纸质出版日期：2010-02-20
- 稿件说明：
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王俊西, 李宏建, 熊志勇, 等. LiF修饰阴极的双层有机电致发光器件的延时效应[J]. 发光学报, 2010,31(1):17-24.

WANG Jun-xi, LI Hong-jian, XIONG Zhi-yong, et al. Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode[J]. Chinese journal of luminescence, 2010, 31(1): 17-24.
王俊西, 李宏建, 熊志勇, 等. LiF修饰阴极的双层有机电致发光器件的延时效应[J]. 发光学报, 2010,31(1):17-24. DOI：

WANG Jun-xi, LI Hong-jian, XIONG Zhi-yong, et al. Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode[J]. Chinese journal of luminescence, 2010, 31(1): 17-24. DOI：

摘要

基于载流子的注入、传输和复合过程

建立了双层有机发光器件的电致发光延时理论模型; 讨论了电致发光延时随电压、注入势垒、内界面势垒、阳极区厚度及LiF缓冲层(BL)厚度的变化关系。结果表明:(1)低电压下

EL延时由复合过程主导

而高电压下

输运过程起着更重要的作用;(2)当

＜2时

M/O界面属于欧姆接触

电流是空间电荷限制的

注入势垒的变化对复合时间

rec

影响较大

当

＞2时

M/O界面成为接触限制

注入势垒的变化对

rec

几乎没有影响;(3)当内界面势垒超过0.3 eV

对t

rec

的影响明显变弱

复合延迟时间基本上由电压和其它因素控制; (4)当电压较小时

随L

/L的增大

rec

增大;当电压超过某一值后

rec

几乎不随L

/L的变化而变化;(5)对于LiF/Ag阴极

在不同的偏压下

LiF的厚度在3.1 nm左右时的复合时间最短

对应的EL延迟时间也最短

这与实验中从电致发光效率的角度得出的LiF最佳厚度一致。

Abstract

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references

. Ding Guiying, Wang Jin, Wang Guangde, et al. High luminance white organic light-emitting devices based on rubrene dopant [J]. Chin. J. Liq. Cryst. Displ. (液晶与显示), 2008, 23 (1):5-10 (in Chinese).

. Li Zhixian, Zhang Fanghui, Wang Xiufeng, et al. Effect of LiF as electron injection layer on OLEDs [J]. Chin. J. Liq. Cryst. Displ. (液晶与显示), 2008, 23 (1):52-57 (in Chinese).

. Jia Yong, Deng Zhenbo, Xiao Jing, et al. The effect of PBD as electron-transporting layer in Alq3 ∶ DCJTB organic light emitting devices [J]. Chin. J. Lumin. (发光学报), 2008, 29 (1):23-26 (in English).

. Shen Lin, Xu Hao, Ye Danqin, et al. High efficiency and high color purity red organic electroluminescent devices using BAlq as host material [J]. Chin. J. Lumin. (发光学报), 2008, 29 (1):51-55 (in Chinese).

. Wang J, Sun R G, Yu G, et al. Fast pulsed electroluminescence from polymer light-emitting diodes [J]. J. Appl. Phys., 2002, 91 (4):2417-2422.

. Wei B, Furukawa K, Amagai J, et al. A dynamic model for injection and transport of charge carriers in pulsed organic light-emitting diodes [J]. Semicond. Sci. Technol., 2004, 19 (5):L56-L59.

. Nikitenko V R, Tak Y H, Bssler H. Rise time of electroluminescence from bilayer light emitting diodes [J]. J. Appl. Phys., 1998, 84 (4):2334-2340.

. Brütting W, Riel H, Beierlein T, et al. Influence of trapped and interfacial charges in organic multilayer light-emitting devices [J]. J. Appl. Phys., 2001, 89 (3):1704-1712.

. Kajii H, Takahashi K, Kim J S, et al. Study of transient electroluminescence process using organic light-emitting diode with partial doping layer [J]. Jpn. J. Appl. Phys. Part 1, 2006, 45 (4B):3721-3724.

. Hung L S, Tang C W, Mason M G. Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode [J]. Appl. Phys. Lett., 1997, 70 (2):152-154.

. Jabbour G E, Kawabe Y, Shaheen S E, et al. Highly efficient and bright organic electroluminescent devices with an aluminum cathode [J]. Appl. Phys. Lett., 1997, 71 (13):1762-1764.

. Park S Y, Lee C H, Song W J, et al. Enhanced electron injection in organic light-emitting devices using Al/LiF electrodes[J]. Current Appl. Phys., 2001, 1 (1):116-120.

. Zhao J M, Zhan Y Q, Zhang S T, et al. Mechanisms of injection enhancement in organic light-emitting diodes through insulating buffer [J]. Appl. Phys. Lett., 2004, 84 (26):5377-5379.

. Ichikawa M, Amagai J, Horiba Y, et al. Dynamic turn-on behavior of organic light-emitting devices with different work function cathode metals under fast pulse excitation [J]. J. Appl. Phys., 2003, 94 (12):7796-7800.

. Yang S Y, Wang Z J, Xu Z, et al. Carriers recombination in bilayer organic light-emitting diodes at high electric fields[J]. Chem. Phys., 2001, 274 (2-3):267-273.

. Albrecht U, Bssler H. Efficiency of charge recombination in organic light emitting diodes [J]. Chem. Phys., 1995, 199 (2-3):207-214.

. Weng R S. Injection mechanisms at the interface between metal and organic layer in OLEDs . Taiwan: Sun Yat-Sen University, 2002, 31-34.

. Tuti E, Berner D, Zuppiroli L. Internal electric field and charge distribution in multilayer organic light-emitting diodes [J]. J. Appl. Phys., 2003, 93 (8):4594-4602.

. Yokoyama T, Yoshimura D, Ito E, et al. Energy level alignment at Alq3/LiF/Al interfaces studied by electron spectroscopies: island growth of LiF and size-dependence of the electronic structures [J]. Jpn. J. Appl. Phys. Part 1, 2003, 42 (6A):3666-3675.

. Li H J, Zhu R H, Yan L L, et al. Electroluminescence efficiency in bilayer organic light-emitting devices with LiF/Al cathode [J]. Science in China (Series G)(中国科学G辑), 2007, 50 (1):31-40 (in Chinese).

. Li H J, Zhu R H, Li X Y, et al. Determination of the optimal thickness of inserted LiF in bilayer organic light-emitting devices [J]. Solid State Commun., 2007, 144 (10-11):445-449.

. Kalinowski J, Marco P D, Camaioni N, et al. Injection-controlled and volume-controlled electroluminescence in organic light-emitting diodes [J]. Synth. Met., 1996, 76 (1-3):77-83.

. Li H J, Zhu R H, Li X Y, et al. An electroluminescence delay time model of bilayer organic light-emitting diodes [J]. Chin. Phys. Lett., 2007, 24 (8):2394-2397.

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