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240912s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202409394
|2 doi
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|a pubmed25n1257.xml
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|a (DE-627)NLM377507997
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|a (NLM)39263757
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Lee, Hakjun
|e verfasserin
|4 aut
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|a Superbly Efficient and Stable Ultrapure Blue Phosphorescent Organic Light-Emitting Diodes with Tetradentate Pt(II) Complex with Vibration Suppression Effect
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 25.11.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a Blue phosphorescent organic light-emitting diodes (PHOLEDs) are on the brink of commercialization for decades. However, the external quantum efficiency (EQE) and operational lifetime of PHOLEDs are not yet reached industrial standards. Here, a novel tetradentate Pt(II) emitter with a spirofluorene onto the carbazole unit that minimizes the vibration modes, corresponding to the structural relaxation during the de-excitation, called the vibration suppression effect is reported. This modification reduces the intensity of the second peak in the spectrum and Shockley-Read-Hall recombination by blocking direct hole injection into the emitter while enhancing Förster resonance energy transfer, resulting in 451 h of LT50 (the time until a 50% decrease in initial luminance at 1000 cd m-2) and 25.1% of the maximum EQE (EQEmax). Thanks to the vibration suppression effect, an extremely narrow full width at half a maximum of 22 nm is obtained. In phosphor-sensitized thermally activated delayed fluorescent OLED, ultra-pure blue emission with Commission internationale de l'Eclairage (CIE) coordinates of (0.136, 0.096) is obtained with 28.1% of EQEmax. Furthermore, 50.3% of the EQEmax and 589 h of LT70 are simultaneously recorded with the two-stack tandem PHOLED, which is the highest EQEmax among 2-tandem and bottom-emission PHOLEDs with CIEy < 0.15
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|a Journal Article
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|a Long lifetime
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|a Phosphorescent organic light‐emitting diodes
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|a Tandem structure
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|a Ultrapure blue
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1 |
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|a Park, Bubae
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Han, Ga Ram
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mun, Min Sik
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kang, Sunwoo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hong, Wan Pyo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Oh, Hyoung Yun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kim, Taekyung
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 47 vom: 01. Nov., Seite e2409394
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g volume:36
|g year:2024
|g number:47
|g day:01
|g month:11
|g pages:e2409394
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|u http://dx.doi.org/10.1002/adma.202409394
|3 Volltext
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