铱
磷光
有机发光二极管
材料科学
电致发光
光电子学
二极管
激子
磷光有机发光二极管
光化学
荧光
化学
光学
图层(电子)
纳米技术
物理
有机化学
量子力学
催化作用
作者
Junsheng Yu,Wei Zhang,Wen Wen,Hui Lin,Yadong Jiang
出处
期刊:Displays
[Elsevier]
日期:2011-04-01
卷期号:32 (2): 87-91
被引量:21
标识
DOI:10.1016/j.displa.2010.12.005
摘要
Using a blue iridium complex phosphorescent dye of bis[(4,6-diflourophenyl)-pyridinato-N,C2′)](picolinato) iridium(III) (FIrpic) and a yellow iridium complex phosphorescent dye of bis[2-(4-tertbutylphenyl)benzothiazolato-N,C2,]iridium (acetylacetonate) [(t-bt)2Ir(acac)] as dual ultrathin layers, nondoped white organic light-emitting diodes (WOLEDs) were fabricated. By optimizing the thickness of ultrathin layers, the influence of FIrpic and (t-bt)2Ir(acac) dual ultrathin layers on the performance of WOLEDs was studied. The results showed that a stable pure white light emission was obtained with a maximum current efficiency of 11.08 cd/A and a power efficiency of 6.21 lm/W. The Commissions Internationale De L’ Eclairage (CIE) coordinates at (0.33, 0.33) were observed at 9 V bias and showed a very slight variation of (±0.01, ±0.01) in a wide range of voltages. The high power efficiency and stable electroluminescence spectra were attributed to the excitons confined effectively in the recombination zone by the charge trapping effect of dual phosphorescent ultrathin layers.
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