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Nanomaterials
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Applications of Advanced Nanomaterials in Display
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Applications of Advanced Nanomaterials in Display

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (20 March 2024) | Viewed by 3596

Special Issue Editors

Prof. Dr. Chang Kyo Kim

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Guest Editor
Department of Electronic Materials, Devices, and Equipment Engineering, Soonchunhyang University, Chungnam, Asan 31538, Republic of Korea
Interests: QLED; OLED; synthesis of nanomaterials; nanofabrication
Prof. Dr. Honyeon Lee

E-Mail Website
Guest Editor
Department of Electronic Materials, Devices, and Equipment Engineering, Soonchunhyang University, Asan 31538, Republic of Korea
Interests: quantum-dot LEDs; OLEDs; thin-film transistors; photovoltaics

Special Issue Information

Dear Colleagues,

Nanomaterials are attracting a great deal of attention for their applications in displays due to their novel electrical, optical, physical, chemical, and structural properties. Important applications of the optoelectronic properties of nanomaterials in display areas include organic light-emitting diodes (OLEDs), quantum-dot light-emitting diodes (QLEDs), nano-light-emitting diodes (nano-LEDs), thin-film transistors (TFTs) and color conversion layers. In addition, the resistance to deformation breakage demonstrated by nanomaterials such as metal nanoparticles/nanowires, carbon nanotubes, graphene, and conductive polymers makes them an ideal alternative to ITO transparent conducting electrodes for flexible displays. This Special Issue of Nanomaterials aims to consider the state of the arts in the fields of organic/inorganic/metallic nanomaterials in display areas. Since research on nanomaterials used in display areas is highly multidisciplinary, this Special Issue welcomes all submissions focusing on the various technological advances—including theoretical simulations, syntheses, or characterizations—of nanomaterials used in displays, and the fabrication techniques, design, characterizations, and applications of OLEDs, QLEDs, nano-LEDs, TFTs, etc.

Prof. Dr. Chang Kyo Kim
Prof. Dr. Honyeon Lee
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • organic light-emitting diode
  • quantum-dot light-emitting diodes
  • nano/micro-light-emitting diode
  • thin film transistors
  • color conversion material
  • transparent conductive film

Published Papers (3 papers)

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Research

12 pages, 3526 KiB  
Article
Effect of Oxidizing Agent on the Synthesis of ZnO Nanoparticles for Inverted Phosphorescent Organic Light-Emitting Devices without Multiple Interlayers
by Se-Jin Lim, Hyeon Kim, Hyun-A Hwang, Hee-Jin Park and Dae-Gyu Moon
Nanomaterials 2024, 14(7), 622; https://doi.org/10.3390/nano14070622 - 2 Apr 2024
Viewed by 640
Abstract
Inverted organic light-emitting devices (OLEDs) have been aggressively developed because of their superiorities such as their high stability, low driving voltage, and low drop of brightness in display applications. The injection of electrons is a critical issue in inverted OLEDs because the ITO [...] Read more.
Inverted organic light-emitting devices (OLEDs) have been aggressively developed because of their superiorities such as their high stability, low driving voltage, and low drop of brightness in display applications. The injection of electrons is a critical issue in inverted OLEDs because the ITO cathode has an overly high work function in injecting electrons into the emission layer from the cathode. We synthesized hexagonal wurtzite ZnO nanoparticles using different oxidizing agents for an efficient injection of electrons in the inverted OLEDs. Potassium hydroxide (KOH) and tetramethylammonium hydroxide pentahydrate (TMAH) were used as oxidizing agents for synthesizing ZnO nanoparticles. The band gap, surface defects, surface morphology, surface roughness, and electrical resistivity of the nanoparticles were investigated. The inverted devices with phosphorescent molecules were prepared using the synthesized nanoparticles. The inverted devices with ZnO nanoparticles using TMAH exhibited a lower driving voltage, lower leakage current, and higher maximum external quantum efficiency. The devices with TMAH-based ZnO nanoparticles exhibited the maximum external quantum efficiency of 19.1%. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials in Display)
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13 pages, 4309 KiB  
Article
Analyses of All Small Molecule-Based Pentacene/C60 Organic Photodiodes Using Vacuum Evaporation Method
by Young Woo Kim, Dongwoon Lee, Yongmin Jeon, Hocheon Yoo, Eou-Sik Cho, Ezgi Darici, Young-Jun Park, Kang-Il Seo and Sang-Jik Kwon
Nanomaterials 2023, 13(21), 2820; https://doi.org/10.3390/nano13212820 - 24 Oct 2023
Cited by 1 | Viewed by 1191
Abstract
The vacuum process using small molecule-based organic materials to make organic photodiodes (OPDIs) will provide many promising features, such as well-defined molecular structure, large scalability, process repeatability, and good compatibility for CMOS integration, compared to the widely used Solution process. We present the [...] Read more.
The vacuum process using small molecule-based organic materials to make organic photodiodes (OPDIs) will provide many promising features, such as well-defined molecular structure, large scalability, process repeatability, and good compatibility for CMOS integration, compared to the widely used Solution process. We present the performance of planar heterojunction OPDIs based on pentacene as the electron donor and C60 as the electron acceptor. In these devices, MoO3 and BCP interfacial layers were interlaced between the electrodes and the active layer as the electron- and hole-blocking layer, respectively. Typically, BCP played a good role in suppressing the dark current by two orders higher than that without that layer. These devices showed a significant dependence of the performance on the thickness of the pentacene. In particular, with the pentacene thickness of 25 nm, an external quantum efficiency at the 360 nm wavelength according to the peak absorption of C60 was enhanced by 1.5 times due to a cavity effect, compared to that of the non-cavity device. This work shows the importance of a vacuum processing approach based on small molecules for OPDIs, and the possibility of improving the performance via the optimization of the device architecture. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials in Display)
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13 pages, 2585 KiB  
Article
Highly Efficient All-Solution-Processed Quantum Dot Light-Emitting Diodes Using MoOx Nanoparticle Hole Injection Layer
by Ji-Hun Yang, Gyeong-Pil Jang, Su-Young Kim, Young-Bin Chae, Kyoung-Ho Lee, Dae-Gyu Moon and Chang-Kyo Kim
Nanomaterials 2023, 13(16), 2324; https://doi.org/10.3390/nano13162324 - 12 Aug 2023
Cited by 2 | Viewed by 1344
Abstract
This paper presents a study that aims to enhance the performance of quantum dot light-emitting didoes (QLEDs) by employing a solution-processed molybdenum oxide (MoOx) nanoparticle (NP) as a hole injection layer (HIL). The study investigates the impact of varying the concentrations [...] Read more.
This paper presents a study that aims to enhance the performance of quantum dot light-emitting didoes (QLEDs) by employing a solution-processed molybdenum oxide (MoOx) nanoparticle (NP) as a hole injection layer (HIL). The study investigates the impact of varying the concentrations of the MoOx NP layer on device characteristics and delves into the underlying mechanisms that contribute to the observed enhancements. Experimental techniques such as an X-ray diffraction and field-emission transmission electron microscopy were employed to confirm the formation of MoOx NPs during the synthesis process. Ultraviolet photoelectron spectroscopy was employed to analyze the electron structure of the QLEDs. Remarkable enhancements in device performance were achieved for the QLED by employing an 8 mg/mL concentration of MoOx nanoparticles. This configuration attains a maximum luminance of 69,240.7 cd/cm2, a maximum current efficiency of 56.0 cd/A, and a maximum external quantum efficiency (EQE) of 13.2%. The obtained results signify notable progress in comparison to those for QLED without HIL, and studies that utilize the widely used poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) HIL. They exhibit a remarkable enhancements of 59.5% and 26.4% in maximum current efficiency, respectively, as well as significant improvements of 42.7% and 20.0% in maximum EQE, respectively. This study opens up new possibilities for the selection of HIL and the fabrication of solution-processed QLEDs, contributing to the potential commercialization of these devices in the future. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials in Display)
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