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|a 10.1002/adma.202311892
|2 doi
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|a eng
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| 100 |
1 |
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|a Sachnik, Oskar
|e verfasserin
|4 aut
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| 245 |
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|a Single-Layer Organic Light-Emitting Diode with Trap-Free Host Beats Power Efficiency and Lifetime of Multilayer Devices
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|c 2024
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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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 The Authors. Advanced Materials published by Wiley‐VCH GmbH.
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|a Organic light-emitting diodes (OLEDs) employing a single active layer potentially offer a number of benefits compared to multilayer devices; reduced number of materials and deposition steps, potential for solution processing, and reduced operating voltage due to the absence of heterojunctions. However, for single-layer OLEDs to achieve efficiencies approaching those of multilayer devices, balanced charge transport is a prerequisite. This requirement excludes many efficient emitters based on thermally activated delayed fluorescence (TADF) that exhibit electron trapping, such as the green-emitting bis(4-(9,9-dimethylacridin-10(9H)-yl)phenyl)methanone (DMAC-BP). By employing a recently developed trap-free large band gap material as a host for DMAC-BP, nearly balanced charge transport is achieved. The single-layer OLED reaches an external quantum efficiency (EQE) of 19.6%, which is comparable to the reported EQEs of 18.9-21% for multilayer devices, but achieves a record power efficiency for DMAC-BP OLEDs of 82 lm W-1, clearly surpassing the reported multilayer power efficiencies of 52.9-59 lm W-1. In addition, the operational stability is greatly improved compared to multilayer devices and the use of conventional host materials in combination with DMAC-BP as an emitter. Next to the obvious reduction in production costs, single-layer OLEDs therefore also offer the advantage of reduced energy consumption and enhanced stability
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|a Journal Article
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|a charge transport
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|a device physics
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| 650 |
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|a organic light‐emitting diodes
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| 650 |
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|a thermally activated delayed fluorescence
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| 700 |
1 |
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|a Ie, Yutaka
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ando, Naoki
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tan, Xiao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Blom, Paul W M
|e verfasserin
|4 aut
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| 700 |
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|a Wetzelaer, Gert-Jan A H
|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: 01. Apr., Seite e2311892
|w (DE-627)NLM098206397
|x 1521-4095
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|g volume:36
|g year:2024
|g number:16
|g day:01
|g month:04
|g pages:e2311892
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|u http://dx.doi.org/10.1002/adma.202311892
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