High-Performance Organic Light Emitting Devices

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: closed (25 September 2021) | Viewed by 2975

Special Issue Editor


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Guest Editor
Department of Chemistry, University of Calgary, 2500 University Dr NW, Calgary, AB T2N 1N4, Canada
Interests: organic light-emitting diodes; quantum dots light-emitting diodes; flexible devices; slot-die coating; organic solar cells; perovskite solar cells

Special Issue Information

Dear colleagues,

Organic light-emitting diodes (OLEDs) have successfully been deployed in mobile phones, televisions and light sources in recent decades, owing to continued improvements in both lifetimes and performance. The new generation OLEDs are far more energy-efficient light sources then traditional incandescent light bulbs and can cover the full spectral range, from visible, to infrared, and ultraviolet wavelengths. New high conductivity conjugated semiconductor polymers, small molecules and nanoparticles are used to achieve high performance OLEDs by incorporation into multilayer structures. Developing new emitter materials to improve the external quantum efficiency and lifetime of OLEDs is a hot topic nowadays. In particular, the use of thermally activated delayed fluorescence (TADF) molecules has been shown to harvest triplet excitons to achieve high performance OLEDs. In addition, the high solubility of these new materials in green solvents provides the opportunity to use modern printed technologies to deliver next-generation high-performance organic electronic devices. Accordingly, this Special Issue seeks to showcase research papers and review articles that focus on high performance organic light emitting devices, new materials for OLEDs, and printing technologies relevant to OLED applications.

Dr. Sergey Dayneko
Guest Editor

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Keywords

  • organic light-emitting devices
  • light-emitting organic field-effect transistors
  • OLEDs
  • thermally activated delayed fluorescence

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Published Papers (1 paper)

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Research

7 pages, 2534 KiB  
Article
Yellow Emissive Tris(8-hydroxyquinoline) Aluminum by the Incorporation of ZnO Quantum Dots for OLED Applications
by Aya Hekmet Makki and Si-Hyun Park
Micromachines 2021, 12(10), 1173; https://doi.org/10.3390/mi12101173 - 29 Sep 2021
Cited by 10 | Viewed by 2543
Abstract
Tris(8-hydroxyquinoline) aluminum complexes are of significant interest because of their remarkable optical and electrical properties, both as an emissive layer and electron injection layer. They emit light in the blue and green ranges of the visible spectrum, so for white organic light emitting [...] Read more.
Tris(8-hydroxyquinoline) aluminum complexes are of significant interest because of their remarkable optical and electrical properties, both as an emissive layer and electron injection layer. They emit light in the blue and green ranges of the visible spectrum, so for white organic light emitting diodes (OLEDs), yellow emission is required as well. In this study, we propose the use of zinc oxide quantum dots to tune the emission color of the complex while maintaining its luminous efficiency. Hence, tris(8-hydroxyquinoline) aluminum-zinc oxide nanohybrids with different zinc oxide quantum dots concentrations (10, 20, or 30 wt.%) were synthesized. The structural properties were characterized using powder X-ray diffraction analysis, while the composition and optical characteristics were characterized by Fourier transform infrared spectroscopy, UV-visible absorption spectroscopy, and photoluminescence emission spectroscopy. The results show that increased levels of zinc oxide quantum dots lead to a decrease in crystallinity, double hump emission and a slight red shift in emission peaks. Also, at 20 and 30 wt.% of zinc oxide quantum dots concentrations, yellow emission was observed. Full article
(This article belongs to the Special Issue High-Performance Organic Light Emitting Devices)
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