Color-Tunable Organic Light-Emitting Diodes with Single Pt (O^N^C^N)-Dibenzofuran Emitter Exhibiting High External Quantum Efficiency of ≈30% and Superior Operational Lifetime
© 2024 The Authors. Advanced Materials published by Wiley‐VCH GmbH..
Color-tunable organic light-emitting diodes (CT-OLEDs) have a large color-tuning range, high efficiency and operational stability at practical luminance, making them ideal for human-machine interactive terminals of wearable biomedical devices. However, the device operational lifetime of CT-OLEDs is currently far from reaching practical requirements. To address this problem, a tetradentate Pt(II) complex named tetra-Pt-dbf, which can emit efficiently in both monomer and aggregation states, is designed. This emitter has high Td of 508 °C and large intermolecular bonding energy of -52.0 kcal mol⁻1, which improve its thermal/chemical stability. This unique single-emitter CT-OLED essentially avoids the "color-aging issue" and achieves a large color-tuning span (red to yellowish green) and a high external quantum efficiency （EQE） of ≈30% at 1000 cd m-2 as well as an EQE of above 25% at 10000 cd m-2. A superior LT90 operational lifetime of 520,536 h at a functional luminance of 100 cd m-2, which is over 20 times longer than the state-of-the-art CT-OLEDs, is estimated. To demonstrate the potential application of such OLEDs in wearable biomedical devices, a simple electromyography (EMG)-visualization system is fabricated using the CT-OLEDs.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2024 |
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| Enthalten in: |
Advanced materials (Deerfield Beach, Fla.) - (2024) vom: 21. März, Seite e2311020 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Mao, Mao [VerfasserIn] |
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| Links: |
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| Themen: |
Color‐tunable |
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| Anmerkungen: |
Date Revised 30.03.2024 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1002/adma.202311020 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 245 | 1 | 0 | |a Color-Tunable Organic Light-Emitting Diodes with Single Pt (O^N^C^N)-Dibenzofuran Emitter Exhibiting High External Quantum Efficiency of ≈30% and Superior Operational Lifetime |
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| 520 | |a Color-tunable organic light-emitting diodes (CT-OLEDs) have a large color-tuning range, high efficiency and operational stability at practical luminance, making them ideal for human-machine interactive terminals of wearable biomedical devices. However, the device operational lifetime of CT-OLEDs is currently far from reaching practical requirements. To address this problem, a tetradentate Pt(II) complex named tetra-Pt-dbf, which can emit efficiently in both monomer and aggregation states, is designed. This emitter has high Td of 508 °C and large intermolecular bonding energy of -52.0 kcal mol⁻1, which improve its thermal/chemical stability. This unique single-emitter CT-OLED essentially avoids the "color-aging issue" and achieves a large color-tuning span (red to yellowish green) and a high external quantum efficiency （EQE） of ≈30% at 1000 cd m-2 as well as an EQE of above 25% at 10000 cd m-2. A superior LT90 operational lifetime of 520,536 h at a functional luminance of 100 cd m-2, which is over 20 times longer than the state-of-the-art CT-OLEDs, is estimated. To demonstrate the potential application of such OLEDs in wearable biomedical devices, a simple electromyography (EMG)-visualization system is fabricated using the CT-OLEDs | ||
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| 650 | 4 | |a device lifetime | |
| 650 | 4 | |a platinum complex | |
| 650 | 4 | |a wearable biomedical device | |
| 700 | 1 | |a Li, Huiyang |e verfasserin |4 aut | |
| 700 | 1 | |a Lo, Kar-Wai |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Dongdong |e verfasserin |4 aut | |
| 700 | 1 | |a Duan, Lian |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Shuo |e verfasserin |4 aut | |
| 700 | 1 | |a Wan, Qingyun |e verfasserin |4 aut | |
| 700 | 1 | |a Tan, Kaixin |e verfasserin |4 aut | |
| 700 | 1 | |a An, Pengcheng |e verfasserin |4 aut | |
| 700 | 1 | |a Cheng, Gang |e verfasserin |4 aut | |
| 700 | 1 | |a Che, Chi-Ming |e verfasserin |4 aut | |
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