White Organic Light‐Emitting Diodes with Evenly Separated Red, Green, and Blue Colors for Efficiency/Color‐Rendition Trade‐Off Optimization

Chen, Shuming; Tan, Guiping; Wong, Wai Yeung; Kwok, Hoi Sing

doi:10.1002/adfm.201100895

Cited by 164 publications

(51 citation statements)

References 59 publications

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“…7,8 Based on this strategy, fluorine is the most utilized substituent and the benchmark sky-blue emitter for phosphorescent OLEDs (PhOLEDs) is iridium(III) bis [4,6-(di-fluorophenyl)pyridinato-N,C 2′]picolinate (FIrpic 1) (Figure 1). 9,10,11,12,13 However, FIrpic suffers two major drawbacks. (i) It has poor solubility in common organic solvents; this limits the concentration at which it can be used as a dopant in solution-processed layers.…”

Section: Introductionmentioning

confidence: 99%

Cyclometalated Ir(III) Complexes for High-Efficiency Solution-Processable Blue PhOLEDs

et al. 2013

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThis article reports the systematic functionalization of FIrpic (1)

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Section: Introductionmentioning

confidence: 99%

Cyclometalated Ir(III) Complexes for High-Efficiency Solution-Processable Blue PhOLEDs

et al. 2013

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“…In order to achieve high CRI value in the three-color WOLED, the spectra of the emitters should not only cover the whole visible region but also compensate each other to decrease the spectra gap between the component colors. 29,32 Thus, another F/P WOLED (device W2), using a yellow-green dopant (Ir(ppy) 2 bop) and a red dopant (Ir(piq) 3 ), has been constructed to improve the performance, especially the CRI of the device. The device structure is shown in Figure 2 (1 nm)/Al, in which the ratio of co-host was according to device W1 and the concentrations of NAA, Ir(piq) 3 , and Ir(ppy) 2 bop were exactly controlled at 8%, 5%, and 8%, respectively.…”

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confidence: 99%

Efficient fluorescence/phosphorescence white organic light-emitting diodes with ultra high color stability and mild efficiency roll-off

Tao

Huang

et al. 2015

Applied Physics Letters

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Efficient fluorescence/phosphorescence hybrid white organic light-emitting diodes (OLEDs) with single doped co-host structure have been fabricated. Device using 9-Naphthyl-10 -(4-triphenylamine)anthrancene as the fluorescent dopant and Ir(ppy)3 and Ir(2-phq)3 as the green and orange phosphorescent dopants show the luminous efficiency of 12.4% (17.6 lm/W, 27.5 cd/A) at 1000 cd/m2. Most important to note that the efficiency-brightness roll-off of the device was very mild. With the brightness rising up to 5000 and 10 000 cd/m2, the efficiency could be kept at 11.8% (14.0 lm/W, 26.5 cd/A) and 11.0% (11.8 lm/W, 25.0 cd/A). The Commission Internationale de L'Eclairage (CIE) coordinates and color rending index (CRI) were measured to be (0.45, 0.48) and 65, respectively, and remained the same in a large range of brightness (1000–10 000 cd/m2), which is scarce in the reported white OLEDs. The performance of the device at high luminance (5000 and 10 000 cd/m2) was among the best reported results including fluorescence/phosphorescence hybrid and all-phosphorescent white OLEDs. Moreover, the CRI of the white OLED can be improved to 83 by using a yellow-green emitter (Ir(ppy)2bop) in the device.

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“…The use of multiple emitters within a single EML is the first way [3][4][5][6]. A second is to use multiple adjacent EMLs and tandem stacks with two or three color combinations are the third one [7][8][9][10][11][12]. The first and second methods are more suitable for the mass production than the third one due to their simplicity of fabrication.…”

Section: Introductionmentioning

confidence: 97%

Color stable phosphorescent white organic light-emitting diodes with double emissive layer structure

Son

Park

Kim

et al. 2013

Organic Electronics

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White Organic Light‐Emitting Diodes with Evenly Separated Red, Green, and Blue Colors for Efficiency/Color‐Rendition Trade‐Off Optimization

Cited by 164 publications

References 59 publications

Cyclometalated Ir(III) Complexes for High-Efficiency Solution-Processable Blue PhOLEDs

Cyclometalated Ir(III) Complexes for High-Efficiency Solution-Processable Blue PhOLEDs

Efficient fluorescence/phosphorescence white organic light-emitting diodes with ultra high color stability and mild efficiency roll-off

Color stable phosphorescent white organic light-emitting diodes with double emissive layer structure

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