Emergence of White Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence

Xiao, Peng; Dong, Ting; Xie, Jinlin; Luo, Dongxiang; Yuan, Jian; Liu, Baiquan

doi:10.3390/app8020299

Cited by 37 publications

(26 citation statements)

References 209 publications

(251 reference statements)

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“…For instance, QD-LEDs can exhibit the maximum external quantum efficiency (EQE) as high as 20.5% [38]. In fact, this efficiency can be comparable with that of best OLEDs [39,40,41,42,43,44,45,46,47,48]. However, by virtue of the knowledge of other types of LEDs, it is helpful to establish high-performance NPL-LEDs.…”

Section: Introductionmentioning

confidence: 99%

Emergence of Nanoplatelet Light-Emitting Diodes

et al. 2018

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Since 2014, nanoplatelet light-emitting diodes (NPL-LEDs) have been emerged as a new kind of LEDs. At first, NPL-LEDs are mainly realized by CdSe based NPLs. Since 2016, hybrid organic-inorganic perovskite NPLs are found to be effective to develop NPL-LEDs. In 2017, all-inorganic perovskite NPLs are also demonstrated for NPL-LEDs. Therefore, the development of NPL-LEDs is flourishing. In this review, the fundamental concepts of NPL-LEDs are first introduced, then the main approaches to realize NPL-LEDs are summarized and the recent progress of representative NPL-LEDs is highlighted, finally the challenges and opportunities for NPL-LEDs are presented.

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Section: Introductionmentioning

confidence: 99%

Emergence of Nanoplatelet Light-Emitting Diodes

et al. 2018

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“…in 2014, where the TADF materials were doped into the fluorescent hosts, achieving a maximum EQE of over 17 %, a peak PE of 34.1 lm W −1 with CIE coordinates of (0.30, 0.38) . So far, TADF materials have been actively investigated to develop WOLEDs owing to the excellent properties (e. g., noble metal‐free characteristic, high efficiency, low driving voltage, bright luminance, lower power consumption and potentially long lifetime) . Hence, despite TADF WOLEDs only reported 4 years ago, their performance has been remarkably improved.…”

Section: Doping‐free Tadf Woledsmentioning

confidence: 99%

“…Hence, despite TADF WOLEDs only reported 4 years ago, their performance has been remarkably improved. For example, TADF WOLEDs can exhibit nearly 20 % EQE, which is comparable to state‐of‐the‐art phosphorescent WOLEDs and hybrid WOLEDs . Encouraged by these outstanding results, researchers would like to use the doping‐free technique to develop TADF WOLEDs.…”

Section: Doping‐free Tadf Woledsmentioning

confidence: 99%

Doping‐Free White Organic Light‐Emitting Diodes

Luo

Xiao

Liu

2018

The Chemical Record

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Doping-free white organic light-emitting diodes (WOLEDs) have great potential to the next-generation solid-state lighting and displays due to the excellent properties, such as high efficiency, bright luminance, low power consumption, simplified structure and low cost. In this account, our recent developments on doping-free WOLEDs have been summarized. Firstly, fundamental concepts of doping-free WOLEDs have been described. Then, the effective strategies to develop doping-free WOLEDs have been presented. Particularly, the manipulation of charges and excitons distribution in different kinds of doping-free WOLEDs have been highlighted, including doping-free fluorescent/phosphorescent hybrid WOLEDs, doping-free thermally activated delayed fluorescent WOLEDs and doping-free phosphorescent WOLEDs. In the end, an outlook for the future development of doping-free WOLEDs have been clarified.

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“…First-generation OLEDs are known as fluorescence OLEDs, and these were able to contribute only 25% of internal quantum efficiency while losing 75% in a non-radiative manner [7][8][9]. Later, phosphorescent OLEDs with metal and ligand complexes were identified as second-generation emitters in OLEDs.…”

Section: Introductionmentioning

confidence: 99%

Fluorene–Triphenylamine-Based Bipolar Materials: Fluorescent Emitter and Host for Yellow Phosphorescent OLEDs

et al. 2020

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In this study, two new bipolar materials were designed and synthesized: N1-(9,9-diphenyl-9H-fluoren-2-yl)-N1-(4,6-diphenylpyrimidin-2-yl)-N4,N4-diphenylbenzene-1,4-diamine (FLU-TPA/PYR) and N1-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-N1-(9,9-diphenyl-9H-fluoren-2-yl)-N4,N4 diphenylbenzene-1,4-diamine (FLU-TPA/TRZ). We fabricated two different devices, namely a yellow phosphorescent organic light-emitting diode (PhOLED) and a non-doped fluorescent OLED emitter with both FLU-TPA/PYR and FLU-TPA/TRZ. The FLU-TPA/PYR host-based yellow PhOLED device showed better maximum current, power and external quantum efficiencies at 21.70 cd/A, 13.64 lm/W and 7.75%, respectively. The observed efficiencies were better than those of the triazine-based FLU-TPA/TRZ. The non-doped fluorescent device with the triazine-based FLU-TPA/TRZ material demonstrated current, power and external quantum efficiencies of 10.30 cd/A, 6.47 lm/W and 3.57%, respectively.

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Emergence of White Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence

Cited by 37 publications

References 209 publications

Emergence of Nanoplatelet Light-Emitting Diodes

Emergence of Nanoplatelet Light-Emitting Diodes

Doping‐Free White Organic Light‐Emitting Diodes

Fluorene–Triphenylamine-Based Bipolar Materials: Fluorescent Emitter and Host for Yellow Phosphorescent OLEDs

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