Realization of Flexible Ultraviolet Organic Light‐Emitting Diodes: Key Design Issues

Lee, Donggyun; Park, Jaehyeok; Lee, Woochan; Kim, Hyung Suk; Yoo, Seunghyup

doi:10.1002/adpr.202170028

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…In the past decades, high-performance red, green, and blue organic light-emitting diodes (OLEDs) have been well developed and employed to fabricate full-color displays for high-end electronics. − In contrast, the development of ultraviolet (UV) OLEDs has been extremely slow. Recently, UV OLEDs have attracted increasing attention owing to their promising applications in industry, healthcare, and agriculture, such as high-density information storage, chemical/biological sensors, excitation light source for UV hardening, skin therapies, 3D printing, sterilization, and plant lighting . Typically, the external quantum efficiencies (EQEs) of most previously reported UV OLEDs do not exceed 5% .…”

Section: Introductionmentioning

confidence: 99%

High-Performance Ultraviolet Organic Light-Emitting Diodes Enabled by Double Boron–Oxygen-Embedded Benzo[m]tetraphene Emitters

Li,

Xu,

Zheng

et al. 2024

J. Am. Chem. Soc.

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Ultraviolet organic light-emitting diodes (UV OLEDs) have attracted increasing attention because of their promising applications in healthcare, industry, and agriculture; however, their development has been hindered by the shortage of robust UV emitters. Herein, we embedded double boron−oxygen units into nonlinear polycyclic aromatic hydrocarbons (BO-PAHs) to regulate their molecular configurations and excited-state properties, enabling novel bent BO-biphenyl (BO-bPh) and helical BO-naphthyl (BO-Nap) emitters with hybridized local and chargetransfer (HLCT) characteristics. They could be facilely synthesized in gram-scale amounts via a highly efficient two-step route. BO-bPh and BO-Nap showed strong UV and violet-blue photoluminescence in toluene with full width at half-maximum values of 25 and 37 nm, along with quantum efficiencies of 98 and 99%, respectively. A BO-bPh-based OLED showed high color purity UV electroluminescence peaking at 394 nm with Commission Internationale de l'Eclairage (CIE) coordinates of (0.166, 0.021). Moreover, the device demonstrated a record-high maximum external quantum efficiency (EQE) of 11.3%, achieved by successful hot exciton utilization. This work demonstrates the promising potential of double BO-PAHs as robust emitters for future UV OLEDs.

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Section: Introductionmentioning

confidence: 99%

High-Performance Ultraviolet Organic Light-Emitting Diodes Enabled by Double Boron–Oxygen-Embedded Benzo[m]tetraphene Emitters

Li,

Xu,

Zheng

et al. 2024

J. Am. Chem. Soc.

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The Golden Age of Thermally Activated Delayed Fluorescence Materials: Design and Exploitation

Dos Santos,

Hall,

Basumatary

et al. 2024

Chem. Rev.

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Recent progress in dielectric/metal/dielectric electrodes for foldable light-emitting devices

Zhang,

Gong,

Zhang

et al. 2023

Nanotechnology Reviews

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Flexible optoelectronic devices have a broad application prospect in the field of wearable electronic devices, among which the superior transparent electrode is the core problem in achieving high-performance flexible optoelectronic devices. The brittle indium tin oxide (ITO) transparent electrode, which is currently commonly used, is difficult to be compatible with the flexible substrate. Multilayer dielectric/metal/dielectric (DMD) structure films are attracting attention as next-generation ITO-free electrodes. High optical transmittance, super electrical conductivity, and mechanical flexibility of DMD electrodes make them promising for highly efficient optoelectronic devices. Despite substantial research on the optimization of DMD electrodes, a large gulf still exists in obtaining foldable and transparent conductive electrodes and applying them to light-emitting devices, including organic light-emitting diodes (LEDs), quantum dot LEDs, and perovskite LEDs. In this perspective, we review the superiority of DMD electrodes in terms of optical and electrical performance, and mechanical flexibility, and summarize their applications in LEDs. Furthermore, we also give future research directions for DMD electrodes regarding physical properties, mechanism stability, and application reliability.

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Realization of Flexible Ultraviolet Organic Light‐Emitting Diodes: Key Design Issues

Cited by 3 publications

References 44 publications

High-Performance Ultraviolet Organic Light-Emitting Diodes Enabled by Double Boron–Oxygen-Embedded Benzo[m]tetraphene Emitters

High-Performance Ultraviolet Organic Light-Emitting Diodes Enabled by Double Boron–Oxygen-Embedded Benzo[m]tetraphene Emitters

The Golden Age of Thermally Activated Delayed Fluorescence Materials: Design and Exploitation

Recent progress in dielectric/metal/dielectric electrodes for foldable light-emitting devices

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