High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers

doi:10.1088/0256-307X/31/4/046801

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	High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers
	Zhang Zhi-Qiang 1,2; Liu Yi-Peng 1; Dai Yan-Feng 1; Chen Jiang-Shan 1; Ma Dong-Ge 1; Zhang Hong-Mei 3
刊名	CHINESE PHYSICS LETTERS
	2014-04-01
卷号	31 期号:4
ISSN号	0256-307X
DOI	10.1088/0256-307X/31/4/046801
英文摘要	Highly efficient phosphorescent white organic light-emitting diodes (WOLEDs) with stable emission spectra are successfully fabricated by using an RCB three-color separately monochromatic emission layer (EML) structure. The EML consists of a sequence of bis(2-methyldibenzo[ f, h] quinoxaline) (acetylacetonate) iridium (III) (Ir(MDQ)(2)(acac)) doped tris(4-carbazoyl-9-ylphenyl) amine (TCTA) as the red emission layer, iridium, tris(2-phenylpyidine)( Ir(ppy)(3)) doped TCTA as the green emission layer and iridium(III) [ bis(4, 6-difuorophenyl)-pyridinato-N, C-2] picolinate (FIrpic) doped a mixed-host of TCTA and tris(4-carbazoyl-9-ylphenyl) amine (26DCz PPy) as the blue emission layer. Without using any out-coupling techniques, the resulting WOLEDs achieve a power efficiency of 42 lm/W at 100 cd/m(2), and 34 lm/W at 1000 cd/m(2). The WOLEDs also show excellent spectrum stability with bias voltages, remaining the Commission Internationale de L'Eclairage coordinates at (0.44, 0.43) from 1000 cd/m(2) to 10000 cd/m(2) and the color rendering index is as high as over 80. We contribute the stable emission spectrum to the RGB separate EML structure that successfully suppresses the undesired competition between host-guest energy transfer and direct exciton formation on emissive dopants by effectively controlling the position of exciton recombination region.
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000334400400031
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/50179]
专题	中国科学院化学研究所
通讯作者	Ma Dong-Ge
作者单位	1.Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Univ Posts & Telecommun, Dept Mat Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhang Zhi-Qiang,Liu Yi-Peng,Dai Yan-Feng,et al. High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers[J]. CHINESE PHYSICS LETTERS,2014,31(4).
APA	Zhang Zhi-Qiang,Liu Yi-Peng,Dai Yan-Feng,Chen Jiang-Shan,Ma Dong-Ge,&Zhang Hong-Mei.(2014).High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers.CHINESE PHYSICS LETTERS,31(4).
MLA	Zhang Zhi-Qiang,et al."High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers".CHINESE PHYSICS LETTERS 31.4(2014).