Comparison of light out-coupling enhancements in single-layer blue-phosphorescent organic light emitting diodes using small-molecule or polymer hosts

Chang, Yung Ting; Liu, Shun Wei; Yuan, Chih Hsien; Ho, Yu Hsuan; Chen, Kuan‐Yu; Lee, Yi Ting; Wu, Min Fei; Lee, Chih Chien; Pei, Wenfeng; Chen, Chin‐Ti; Wu, Chih I.

doi:10.1063/1.4829677

Cited by 8 publications

(2 citation statements)

References 49 publications

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“…All three devices exhibit typical sky-blue emissions of FIrpic with a λ max of ~468 nm, although a variation of emission shoulder band around 500 nm (Figure 6a) was observed. Since both BL and TL devices have a similar intensity of the shoulder band and are both more intense than that of the SL device, it can be logically inferred that TmPyPB effectively blocks the triplet exciton of FIrpic, confining the charge recombination mostly in the SimCP3 :FIrpic light-emitting layer (i.e., farther away from the cathode surface) [19]. Therefore, the same reason can be ascribed to the low EL efficiency of the SL device (Figure 6b,c), where the triplet exciton of FIrpic generates in an area too close to the cathode surface and hence is prone to being quenched.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, for more desirable production or fabrication process, there have been a number of solution-processable small molecular host materials for blue phosphorescence organic light-emitting diodes in recent years [8,9,10,11,12,13,14]. We and others have developed and demonstrated bis(3,5-di(9 H -carbazol-9-yl)phenyl)diphenylsilane ( SimCP2 in Scheme 1) as one of high-performance solution-processable small molecular host materials for yellow, green, and blue phosphorescence OLEDs [15,16,17,18,19,20,21,22]. More recently, SimCP2 hosted FIrpic OLEDs were reported as having EL efficiency reaching ~11%, ~11 lm/W, or 23 cd/A [23].…”

Section: Introductionmentioning

confidence: 99%

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SimCP3—An Advanced Homologue of SimCP2 as a Solution-Processed Small Molecular Host Material for Blue Phosphorescence Organic Light-Emitting Diodes

Lee

Chang

et al. 2016

Molecules

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Abstract:We have overcome the synthetic difficulty of 9,9 ,9 ,9 ,9 ,9 -((phenylsilanetriyl) tris(benzene-5,3,1-triyl))hexakis(9H-carbazole) (SimCP3) an advanced homologue of previously known SimCP2 as a solution-processed, high triplet gap energy host material for a blue phosphorescence dopant. A series of organic light-emitting diodes based on blue phosphorescence dopant iridium (III) bis(4,6-difluorophenylpyridinato)picolate, FIrpic, were fabricated and tested to demonstrate the validity of solution-processed SimCP3 in the device fabrication.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

SimCP3—An Advanced Homologue of SimCP2 as a Solution-Processed Small Molecular Host Material for Blue Phosphorescence Organic Light-Emitting Diodes

Lee

Chang

et al. 2016

Molecules

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Designing Host Materials for the Emissive Layer of Single‐Layer Phosphorescent Organic Light‐Emitting Diodes: Toward Simplified Organic Devices

Poriel

Rault‐Berthelot

2021

Adv Funct Materials

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Thanks to the tremendous effort over the last 20 years, phosphorescent organic light‐emitting diodes (PhOLEDs) represent a prevalent technology. In this technology, all the high‐efficiency PhOLEDs are multi‐layer devices constituting, in addition to the emissive layer (EML), of a stack of functional organic layers. These layers play a crucial role in the device performance as they improve the injection, transport, and recombination of charges within the EML. Single‐layer PhOLEDs (SL‐PhOLEDs) represent ideal OLEDs, consisting only of the electrodes and the EML. However, reaching high‐performance SL‐PhOLED is far from easy, as removing the functional layers of an OLED stack dramatically decreases the performance. To achieve high SL‐PhOLED efficiency, the efficient injection, transport, and recombination of charges should be insured by the EML, and particularly, by the host material. In the present exhaustive review, the different molecular design strategies are analyzed, which have been used to construct high‐efficiency hosts for SL‐PhOLED. The impact of the electronic properties (triplet energy, HOMO/LUMO energy, mobility etc.) on the device characteristics (threshold voltage, electroluminescent spectrum, external quantum efficiency, etc.) are discussed. This allows to draw a structure/properties/device performance relationship map of interest for the future design of functional materials for SL‐PhOLEDs.

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Photoelectrical properties and surface examination of luminescent copolymer compounds

Lewińska

Danel

Wisła-Świder

et al. 2020

Applied Surface Science

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Comparison of light out-coupling enhancements in single-layer blue-phosphorescent organic light emitting diodes using small-molecule or polymer hosts

Cited by 8 publications

References 49 publications

SimCP3—An Advanced Homologue of SimCP2 as a Solution-Processed Small Molecular Host Material for Blue Phosphorescence Organic Light-Emitting Diodes

SimCP3—An Advanced Homologue of SimCP2 as a Solution-Processed Small Molecular Host Material for Blue Phosphorescence Organic Light-Emitting Diodes

Designing Host Materials for the Emissive Layer of Single‐Layer Phosphorescent Organic Light‐Emitting Diodes: Toward Simplified Organic Devices

Photoelectrical properties and surface examination of luminescent copolymer compounds

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