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240118s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202312334
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|a eng
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1 |
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|a Zhang, Heng
|e verfasserin
|4 aut
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|a 220 V/50 Hz Compatible Bipolar Quantum-Dot Light-Emitting Diodes
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|c 2024
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|a Text
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|a ƒaComputermedien
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|a Date Revised 18.04.2024
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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 Alternating current (AC)-driven quantum-dot light-emitting diodes (QLEDs) are superior to direct current-driven QLEDs because they can be directly integrated into household AC electricity and have high stability. However, achieving high-performance AC-driven QLEDs remains challenging. In this work, a bipolar QLED with coplanar electrodes is realized by horizontally connecting a regular QLED and an inverted QLED in series using an Al bridging layer. The bipolar QLED can be turned on with either a positive or a negative bias voltage, with a high external quantum efficiency (EQE) of 22.9%. By replacing the Al with Ag, the resistances of the electron transport layers are effectively reduced, and thus the bipolar QLED shows an enhanced brightness of 16370 cd m-2 at 15 V. By connecting multiple bipolar QLEDs in series, the resulting light source can be directly driven by a 220 V/50 Hz household power supply without the need for back-end electronics. The bipolar QLED can also be realized by vertically stacking a regular QLED and an inverted QLED with a metallic intermediate connection layer. It is demonstrated that the coplanar or vertical bipolar QLEDs could find potential applications in household AC electricity play-and-plug solid-state lighting and single- or double-sided displays
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|a Journal Article
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|a bipolar
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|a coplanar‐electrode
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|a light‐emitting diodes
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|a quantum dots
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4 |
|a tandem
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1 |
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|a Wang, Jiming
|e verfasserin
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| 700 |
1 |
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|a Chen, Shuming
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 16 vom: 30. Apr., Seite e2312334
|w (DE-627)NLM098206397
|x 1521-4095
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|g volume:36
|g year:2024
|g number:16
|g day:30
|g month:04
|g pages:e2312334
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|u http://dx.doi.org/10.1002/adma.202312334
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