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Chin. Phys. B, 2018, Vol. 27(10): 107801    DOI: 10.1088/1674-1056/27/10/107801
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
Abstract  

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).

Keywords:  organic light emitting diodes      multiple dopants layer      buffer layer      color stability  
Received:  23 May 2018      Revised:  06 July 2018      Accepted manuscript online: 
PACS:  78.60.Fi (Electroluminescence)  
  85.60.Jb (Light-emitting devices)  
  73.21.Ac (Multilayers)  
Corresponding Authors:  Zhi-Qi Kou     E-mail:  usst102@aliyun.com

Cite this article: 

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 2018 Chin. Phys. B 27 107801

[1] Liao Y J, Lou Y H, Wang Z K and Liao L S 2014 Chin. Phys. B 23 118508
[2] Ying L, Ho C L, Wu H B, Cao Y and Wong W Y 2014 Adv. Mater. 26 2459
[3] Zhu W, Yu J, Qian B, Xiao T, Zhai G and Wei B 2016 Synth. Met. 220 621
[4] Zhu Y K, Zhong J, Lei S Y, Chen H, Shao S S and Lin Y 2017 Chin. Phys. B 26 087302
[5] Shi X B, Gao C H, Zhou D Y, Qian M, Wang Z K and Liao L S 2012 Appl. Phys. Express 5 102102
[6] Xu L, Tang C W and Rothberg L J 2016 Org. Electron. 32 54
[7] Sun N, Wang Q, ZhaoY, Chen Y, Yang D, Zhao F, Chen J and Ma D 2014 Adv. Mater. 26 1617
[8] Chen P, Zhao L, Duan Y, Zhao Y, Xie W, Xie G, Liu S, Zhang L and Li B 2011 J. Lumin. 131 2144
[9] Islam A, Zhang D, Peng R, Yang R J, Hong L, Song W, Wei Q, Duan L and Ge Z Y 2017 Chem. Asian. J. 12 2189
[10] Xue K, Han G, Duan Y, Chen P, Yang Y Q, Yang D, Duan Y H, Wang X and Zhao Y 2015 Org. Electron. 18 84
[11] Ma Z, Yu J, Li L and Jiang Y D 2012 Displays 33 42
[12] Kim J W, You S, Yoon N A, Cheah K W, Zhu F R and Kim W Y 2015 Sci. Rep. 4 7009
[13] Chen P, Chen B, Zuo L, Duan Y, Han G, Sheng R, Xue K and Zhao Y 2016 Org. Electron. 31 136
[14] Han G, Chen B, Zuo L, Xue K, Chen P, Duan Y and Zhao Y 2016 Org. Electron. 37 207
[15] Liu B, Luo D, Gao D, Wang X, Xu M, Zou J, Ning H, Wang L, Peng J and Cao Y 2015 Org. Electron. 27 29
[16] Wei N, Guo K P, Zhou P C, Yu J N, Wei B and Zhang J H 2014 Chin. Phys. B 23 077802
[17] Qi Y, Wang Z, Hou S and Yu J 2017 Org. Electron. 43 112
[18] Yang H J, Lee H W, Lee S E, Sun Y, Hwang K M, Yoo K H, Lee S K, Kim W Y and Kim Y K 2015 Thin Solid Films 587 61
[19] Song W and Lee J Y 2015 J. Phys. D:Appl. Phys. 48 365106
[20] Jou J H, Kumar S, Agrawal A, Li T H and Sahoo S 2015 J. Mater. Chem. 3 2974
[21] Zhang H, Yang X, Cheng J, Li D, Chen H, Yu J and Li L 2017 Org. Electron. 50 147
[22] Xue K, Sheng R, Duan Y, Chen P, Chen B, Wang X, Duan Y and Zhao Y 2015 Org. Electron. 26 451
[23] Du Q, Wang W, Li S, Zhang D, Li W and Zheng W 2016 Opt. Commun. 366 253
[24] Reineke S, Lindner F, Schwartz G, Seidler N, Walzer K, Lussem B and Leo K 2009 Nature 459 234
[25] Tan T, Ouyang S, Xie Y, Wang D, Zhu D, Xu X and Fong H H 2015 Org. Electron. 25 232
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