Simultaneously Realizing High Efficiency and High Color Rendering Index for Hybrid White Organic Light-Emitting Diodes by Ultra-Thin Design of Delayed Fluorescence Sensitized Phosphorescent Layers
© 2023 Wiley-VCH GmbH..
In consideration of energy economization and light quality, concurrently attaining high external quantum efficiency (ηext ) and high color rendering index (CRI) is of high significance for the commercialization of hybrid white organic light-emitting diodes (WOLEDs) but is challenging. Herein, a blue luminescent molecule (2PCz-XT) consisting of a xanthone acceptor and two 3,6-diphenylcarbazole donors is prepared, which exhibits strong delayed fluorescence, short delayed fluorescence lifetime, and excellent electroluminescence property, and can sensitize green, orange, and red phosphorescent emitters efficiently. By employing 2PCz-XT as sensitizer and phosphorescent emitters as dopants, efficient two-color and three-color WOLED architectures with ultra-thin phosphorescent emitting layers (EMLs) are proposed and constructed. By incorporating a thin interlayer to modulate exciton recombination zone and reduce exciton loss, high-performance three-color hybrid WOLEDs are finally achieved, providing a high ηext of 26.8% and a high CRI value 83 simultaneously. Further configuration optimization realizes a long device operational lifetime. These WOLEDs with ultra-thin phosphorescent EMLs are among the state-of-the-art hybrid WOLEDs in the literature, demonstrating the success and applicability of the proposed device design for developing robust hybrid WOLEDs with superb efficiency and color quality.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:20 |
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| Enthalten in: |
Small (Weinheim an der Bergstrasse, Germany) - 20(2024), 8 vom: 03. Feb., Seite e2305589 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Zhangshan [VerfasserIn] |
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| Links: |
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| Themen: |
Color rendering index |
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| Anmerkungen: |
Date Revised 25.02.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/smll.202305589 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM363216049 |
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| 520 | |a © 2023 Wiley-VCH GmbH. | ||
| 520 | |a In consideration of energy economization and light quality, concurrently attaining high external quantum efficiency (ηext ) and high color rendering index (CRI) is of high significance for the commercialization of hybrid white organic light-emitting diodes (WOLEDs) but is challenging. Herein, a blue luminescent molecule (2PCz-XT) consisting of a xanthone acceptor and two 3,6-diphenylcarbazole donors is prepared, which exhibits strong delayed fluorescence, short delayed fluorescence lifetime, and excellent electroluminescence property, and can sensitize green, orange, and red phosphorescent emitters efficiently. By employing 2PCz-XT as sensitizer and phosphorescent emitters as dopants, efficient two-color and three-color WOLED architectures with ultra-thin phosphorescent emitting layers (EMLs) are proposed and constructed. By incorporating a thin interlayer to modulate exciton recombination zone and reduce exciton loss, high-performance three-color hybrid WOLEDs are finally achieved, providing a high ηext of 26.8% and a high CRI value 83 simultaneously. Further configuration optimization realizes a long device operational lifetime. These WOLEDs with ultra-thin phosphorescent EMLs are among the state-of-the-art hybrid WOLEDs in the literature, demonstrating the success and applicability of the proposed device design for developing robust hybrid WOLEDs with superb efficiency and color quality | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a operational lifetime | |
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| 650 | 4 | |a thermally activated delayed fluorescence | |
| 650 | 4 | |a white organic light-emitting diodes | |
| 700 | 1 | |a Chen, Jinke |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Letian |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Hao |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Dezhi |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Dongge |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Ben Zhong |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Zujin |e verfasserin |4 aut | |
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