Full phosphorescent white-light organic light-emitting diodes with improved color stability and efficiency by fine tuning primary emission contributions | Zendy

Hua Wang | Zendy; Xiaogang Du | Zendy; Wenming Su | Zendy; Wenjing Lin | Zendy; Dongyu Zhang | Zendy

Open Access

Full phosphorescent white-light organic light-emitting diodes with improved color stability and efficiency by fine tuning primary emission contributions

Author(s) -

Hua Wang,

Xiaogang Du,

Wenming Su,

Wenjing Lin,

Dongyu Zhang

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4865209

Subject(s) - oled , iridium , phosphorescence , materials science , luminous efficacy , light emission , chemistry , optoelectronics , photochemistry , layer (electronics) , fluorescence , optics , nanotechnology , physics , organic chemistry , catalysis

In this paper, a novel type of white-light organic light emitting diode (OLED) with high color stability was reported, in which the yellow-light emission layer of (4,4′-N,N′-dicarbazole)biphenyl (CBP) : tris(2-phenylquinoline-C2,N′)iridium(III) (Ir(2-phq)3) was sandwiched by double blue-light emission layers of 1,1-bis-[(di-4-tolylamino)pheny1]cyclohexane (TAPC) : bis[4,6-(di-fluorophenyl)-pyridinato-N,C2′]picolinate (FIrpic) and tris[3-(3-pyridyl)mesityl]borane (3TPYMB):FIrpic. And, it exhibited the maximum current efficiency of 33.1 cd/A, the turn-on voltage at about 3 V and the maximum luminance in excess of 20000 cd/m2. More important, it realized very stable white-light emission, and its CIE(x, y) coordinates only shift from (0.34, 0.37) to (0.33, 0.37) as applied voltage increased from 5 V to 12 V. It is believed that the new scheme in emission layer of white-light OLED can fine tune the contribution of primary emission with applied voltage changed, resulting in high quality white-light OLED

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