Efficient blue and white phosphorescent organic light-emitting diodes with a mixed host in emission layer

Xiang, Wei; Yu, Haojian; Cao, Jin; Jhun, Chul-Gyu; Chen, Chao-Ping

doi:10.1080/09273948.2017.1338908

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The hole-transporting material 4,40,400-tri(N-carbazolyl) triphenylamine (TCTA) and electron-transporting materials 1,3,5-tri(m-pyrid-3-yl-phenyl) benzene (Tm 3 PyPB) were mixed as the bipolar interlayers. According to our previous study, the current density of hole only devices and electron only devices were close when the mass ratio of TCTA: Tm 3 PyPB was 3.5: 1 35 . The thicknesses of bipolar interlayers were changed to adjust the energy transfer from short-wave emitters to long-wave emitters.…”

Section: Introductionmentioning

confidence: 52%

Efficient white phosphorescent organic light-emitting diodes using ultrathin emissive layers (<1 nm)

Dai

Yao

et al. 2018

Sci Rep

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In this paper, efficient phosphorescent white organic light-emitting diodes (WOLEDs) were fabricated based on ultrathin doping-free emissive layers and mixed bipolar interlayers. The energy transfer processes were proved via the research of WOLEDs with different interlayer thicknesses and transient photoluminescence lifetime. WOLEDs with optimized thickness of doping-free emissive layers show maximum current efficiency of 47.8 cd/A and 44.9 cd/A for three-colors and four-colors WOLEDs, respectively. The Commission Internationale de L’Eclairage coordinates shows a very slight variation of ( ± 0.02, ± 0.02) from 5793 cd/m2 to 11370 cd/m2 for three-colors WOLEDs and from 3038 cd/m2 to 13720 cd/m2 for four-colors WOLEDs, respectively. The stability of the spectra is attributed to the stable and sequential energy transfer among the various dyes. The color temperature of four-colors WOLEDs can be obtained from 2659 to 6636 by adjusting the thickness of ultrathin emissive layer.

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Section: Introductionmentioning

confidence: 52%

Efficient white phosphorescent organic light-emitting diodes using ultrathin emissive layers (<1 nm)

Dai

Yao

et al. 2018

Sci Rep

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“…To solve this issue, researchers proposed mixed-hosts which were easily obtained by doping electron transport type hosts into hole transport type hosts. It was demonstrated that the mixed-host exhibited almost the same performance as the synthesized bipolar host by carefully controlling the doping ratio of the two host materials ( Wei et al., 2017 ; Sheng et al., 2016 ; Jou et al., 2015 ).…”

Section: Oleds With Phosphorescent Uemls Inserted Into Blue Emittersmentioning

confidence: 99%

Recent progress on organic light-emitting diodes with phosphorescent ultrathin (<1nm) light-emitting layers

Miao

Yin

2022

iScience

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Optimization of Gate Structure for Damageless MicroLED Thin Films in Optogenetic Applications

Kitade,

Kanda,

Matsui

et al. 2024

Physica Status Solidi (a)

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Flexible MicroLEDs hold great promise as a novel tool for advancing optogenetics, enabling applications in biology. Such applications require the technology to assemble MicroLEDs onto ultra‐thin biocompatible films that conform to the delicate and uneven brain and biological tissues. In this study, a batch transfer technique using thermal release sheets is propsed. By optimizing the gate structures that support the hollow structure, a method to transfer MicroLEDs to the film without causing damage is established. It is successfully demonstrated that the flexible MicroLED films, fabricated using this technique, can be placed on the brain surface of transgenic mice and induce neural activity through optogenetic stimulation.

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Efficient blue and white phosphorescent organic light-emitting diodes with a mixed host in emission layer

Cited by 5 publications

References 32 publications

Efficient white phosphorescent organic light-emitting diodes using ultrathin emissive layers (<1 nm)

Efficient white phosphorescent organic light-emitting diodes using ultrathin emissive layers (<1 nm)

Recent progress on organic light-emitting diodes with phosphorescent ultrathin (<1nm) light-emitting layers

Optimization of Gate Structure for Damageless MicroLED Thin Films in Optogenetic Applications

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