Color-stable, reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness

doi:10.1088/1674-1056/22/7/077303

Abstract High-brightness and color-stable two-wavelength hybrid white organic light emitting diodes (HWOLEDs) with the configuration of indium tin oxide (ITO)/N, N, N', N'-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD): tetrafluoro-tetracyanoqino dimethane (F4-TCNQ)/N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB)/4,4-N,N-dicarbazolebiphenyl (CBP): iridium (III) diazine complexes (MPPZ)₂Ir(acac)/NPB/2-methyl-9,10-di(2-naphthyl)anthracene (MADN): p-bis(p-N,N-di-phenyl-aminostyryl)benzene (DSA-ph)/bis(10-hydroxybenzo[h] quinolinato)beryllium complex (Bebq₂)/LiF/Al have been fabricated and characterized. The optimal brightness of the device is 69932 cd/m² at a voltage of 13 V, and the Commission Internationale de l'Eclairage (CIE) chromaticity coordinates are almost constant during a large voltage change of 6-12 V. Furthermore, a current efficiency of 15.3 cd/A at an illumination-relevant brightness of 1000 cd/m² is obtained, which rolls off slightly to 13.0 cd/A at an ultra high brightness of 50000 cd/m². We attribute this great performance to wisely selecting an appropriate spacer together with effectively utilizing the combinations of exciton-harvested orange-phosphorescence/blue-fluorescence in the device. Undoubtedly, this is one of the most exciting results in two-wavelength HWOLEDs up to now.

Keywords: white light color stability efficiency roll-off high brightness

Received: 31 December 2012
Revised: 22 February 2013
Accepted manuscript online:

PACS:	73.21.Ac	(Multilayers)
	73.40.Lq	(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
	73.40.Jn	(Metal-to-metal contacts)
	73.61.Ph	(Polymers; organic compounds)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2009CB623604), the National Natural Science Foundation of China (Grant Nos. 61204087, 51173049, U0634003, 61036007, and 60937001), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2011ZB0002 and 2011ZM0009), and China Postdoctoral Science Foundation.

Corresponding Authors: Zou Jian-Hua
E-mail: zou1007@gmail.com

Cite this article:

Liu Bai-Quan (刘佰全), Tao Hong (陶洪), Su Yue-Ju (苏跃举), Gao Dong-Yu (高栋雨), Lan Lin-Feng (兰林锋), Zou Jian-Hua (邹建华), Peng Jun-Biao (彭俊彪) Color-stable, reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness 2013 Chin. Phys. B 22 077303

[1]	Zou J H, Liu J, Wu H B, Yang W, Peng J B and Cao Y 2009 Org. Electron. 10 843
[2]	Zou J H, Lan L F, Xu R X, Yang W and Peng J B 2010 Acta Phys. Sin. 59 1275 (in Chinese)
[3]	Zou J H, Wu H, Lam C, Wang C, Zhu J, Zhong C, Hu S, Ho S, Zhou G, Wu H, Choy W, Peng J B, Cao Y and Wong W 2011 Adv. Mater. 23 2976
[4]	Zhang L J, Hua Y L, Wu X M, Wang Y and Yin S G 2008 Chin. Phys. B 17 3097
[5]	Meng L C, Lou Z D, Yang S Y, Hou Y B, Teng F, Liu X J and Li Y B 2012 Chin. Phys. B 21 088504
[6]	Reineke S, Lindner F, Schwartz G, Seidler N, Walzer K, Lussem B and Leo K 2009 Nature 459 234
[7]	DuanY, Mazzeo M, Maiorano V, Mariano F, Qin D, Cingolani R and Gigli G 2008 Appl. Phys. Lett. 92 113304
[8]	Schwartz G, Reineke S, Rosenow T, Walzer K and Leo K 2009 Adv. Funct. Mater. 19 1319
[9]	D'Andrade B W 2007 Nature Photon. 1 33
[10]	D'Andrade B W, Holmes R J and Forrest S R 2004 Adv. Mater. 16 624
[11]	Sun Y, Giebink N, Kanno H, Ma B, Thompson M and Forrest S R 2006 Nature 440 908
[12]	Cheng G, Zhang Y F, Zhao Y, Liu S Y and Ma Y G 2006 Appl. Phys. Lett. 88 083512
[13]	Schwartz G, Pfeiffer M, Reineke S, Walzer K and Leo K 2007 Adv. Mater. 19 3672
[14]	Wang Q, Ho C, ZhaoY, Ma D, Wong W and Wang L 2009 Org. Electron. 11 238
[15]	Wang Q, Ding J, Ma D, Cheng Y, Wang L and Wang F 2009 Adv. Mater. 21 2397
[16]	Wang Q, Ding J, Cheng Y, Wang L and Ma D 2009 J. Phys. D: Appl. Phys. 42 065106
[17]	Chen P, Xie W, Li J, Guan T, Duan Y, Zhao Y, Liu S, Ma C Zhang L and Li B 2007 Appl. Phys. Lett. 91 023505
[18]	Yan B, Cheung C, Kui S, Xiang H, Roy V, Xu S and Che C 2007 Adv. Mater. 19 3599
[19]	Su S J, Gonmori E, Sasabe H and Kido J 2008 Adv. Mater. 20 4189
[20]	Lee Y H, Jua B K, Jeon W S, Kwon J H, Park O O, Yu J W and Chin B D 2009 Synth. Met. 159 325
[21]	Seo J H, Park J S, Lee S K, Seo B M, Lee K H, Park J K, Yoon S S and Kim Y K 2011 Current Applied Physics 11 564
[22]	Seo J H, Park J S, Koo J R, Lee S J, Seo B M, Lee K H, Park J K, Yoon S S and Kim Y K 2010 Jpn. J. Appl. Phys. 49 042104
[23]	Wang Y, Hua Y L, Wu X, Zhang L, Hou C, Yin S and Petty M C 2008 Appl. Phys. Lett. 92 123504
[24]	Yang J P, Bao Q Y, Xu Z Q, Li Y Q, Tang J X and Shen S 2010 Appl. Phys. Lett. 97 223303

[1]	Luminescent characteristics of Tm³⁺/Tb³⁺/Eu³⁺ tri-doped Na₅Y₉F₃₂ single crystals for white emission with high thermal stability Lizhi Fang(方立志), Xiong Zhou(周雄), Zhiwei Zhao(赵志伟), Biao Zheng(郑标), Haiping Xia(夏海平), Jun Wang(王军), Hongwei Song(宋宏伟), and Baojiu Chen(陈宝玖). Chin. Phys. B, 2022, 31(12): 127802.
[2]	Monolithic semi-polar (1101) InGaN/GaN near white light-emitting diodes on micro-striped Si (100) substrate Qi Wang(王琦), Guo-Dong Yuan(袁国栋), Wen-Qiang Liu(刘文强), Shuai Zhao(赵帅), Lu Zhang(张璐), Zhi-Qiang Liu(刘志强), Jun-Xi Wang(王军喜), Jin-Min Li(李晋闽). Chin. Phys. B, 2019, 28(8): 087802.
[3]	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). Chin. Phys. B, 2018, 27(10): 107801.
[4]	Enhancement of Förster energy transfer from thermally activated delayed fluorophores layer to ultrathin phosphor layer for high color stability in non-doped hybrid white organic light-emitting devices Zijun Wang(王子君), Juan Zhao(赵娟), Chang Zhou(周畅), Yige Qi(祁一歌), Junsheng Yu(于军胜). Chin. Phys. B, 2017, 26(4): 047302.
[5]	Phosphor-free white light-emitting diodes Guo Xia (郭霞), Liu Qiao-Li (刘巧莉), Li Chong (李冲), Liu Bai (刘白), Dong Jian (董建), Shen Guang-Di (沈光地). Chin. Phys. B, 2015, 24(6): 068505.
[6]	Fabrication and temperature-dependent photoluminescence spectra of Zn-Cu-In-S quaternary nanocrystals Liu Xiao-Juan (刘晓娟), Zhang Xiao-Song (张晓松), Li Lan (李岚), Wang Xue-Liang (王雪亮), Yuan Lin-Lin (苑琳琳). Chin. Phys. B, 2014, 23(11): 117804.
[7]	White emission from Tm³⁺/Tb³⁺/Eu³⁺ co-doped fluoride zirconate under ultraviolet excitation Sun Jian (孙健), Zhang Xiao-Song (张晓松), Yuan Lin-Lin (苑琳琳), Feng Zhi-Jun (冯志军), Ling Zhi (凌志), Li Lan (李岚). Chin. Phys. B, 2014, 23(11): 114103.
[8]	A novel Dy³⁺-doped Gd(PO₃)₃ white-light phosphors under VUV excitation for Hg-free lamps application Zhang Li (张锂), Han Guo-Cai (韩国才). Chin. Phys. B, 2013, 22(2): 027803.
[9]	Flexible white top-emitting organic light-emitting diode with a MoO_x roughness improvement layer Chen Shu-Fen (陈淑芬), Guo Xu (郭旭), Wu Qiang (邬强), Zhao Xiao-Fei (赵晓飞), Shao Ming (邵茗), Huang Wei (黄维). Chin. Phys. B, 2013, 22(12): 128506.
[10]	Color-converted remote phosphor prototype of multiwavelength excitable borosilicate glass for white light-emitting diodes Tian Hua (田华), Liu Ji-Wen (刘技文), Qiu Kun (仇坤), Song Jun (宋俊), Wang Da-Jian (王达健). Chin. Phys. B, 2012, 21(9): 098504.
[11]	Growth and properties of wide spectral white light emitting diodes Xie Zi-Li(谢自力), Zhang Rong(张荣), Fu De-Yi(傅德颐), Liu Bin(刘斌),Xiu Xiang-Qian(修向前), Hua Xue-Mei(华雪梅), Zhao Hong(赵红), Chen Peng(陈鹏),Han Ping(韩平), Shi Yi(施毅), and Zheng You-Dou(郑有炓) . Chin. Phys. B, 2011, 20(11): 116801.
[12]	A novel yellow phosphor for white light emitting diodes Wang Zhi-Jun(王志军), Li Pan-Lai(李盼来), Yang Zhi-Ping(杨志平), Guo Qing-Lin(郭庆林), and Li Xu(李旭). Chin. Phys. B, 2010, 19(1): 017801.
[13]	Structure and luminescence of Ca₂Si₅N₈:Eu²⁺ phosphor for warm white light-emitting diodes Wei Xiao-Dan(魏小丹), Cai Li-Yan(蔡丽艳), Lu Fa-Chun(鲁法春), Chen Xiao-Long(陈小龙), Chen Xue-Yuan(陈学元), and Liu Quan-Lin(刘泉林). Chin. Phys. B, 2009, 18(8): 3555-3562.
[14]	Studying a kind of portable ultra-bright microfocus x-raysource Wang Kai-Ge(王凯歌), Wang Lei(王雷), and Niu Han-Ben(牛憨笨). Chin. Phys. B, 2009, 18(5): 1807-1813.
[15]	Luminescence characteristics of Eu³⁺ activated borate phosphor for white light emitting diode Li Pan-Lai(李盼来), Yang Zhi-Ping(杨志平), Wang Zhi-Jun(王志军), and Guo Qing-Lin(郭庆林). Chin. Phys. B, 2008, 17(5): 1907-1910.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Color-stable, reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness

Cite this article:

Online attention