Special Issue "Organic Electronic Devices, Volume II"

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

Deadline for manuscript submissions: 31 May 2021.

Special Issue Editor

Prof. Byung Jun Jung
Website
Guest Editor
Department of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Korea
Interests: organic electronics–organic light-emitting diode (OLED); organic field effect transistor (OFET); organic photovoltaic device (OPV); organic thermoelectric device; organic semiconducting materials
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, organic electronic devices are not only used in laboratories but have also been commercialized. The main advantages of organic electronic devices are that they are thin, light weight, and flexible. Still, there are concerns regarding their durability and reliability. However, some of them are better than before due to the development of materials and well-reported fabrication protocols.

In this Special Issue, we focus on the integration or convergence of organic electronic devices for new applications, such as biomedical devices, health care devices, environmental monitoring sensors, self-powered IoT (Internet of Things) devices, and new portable electronic devices. The concept of high-performance organic electronic devices and research tools/platforms based on organic electronic devices is welcome. We also discuss new equipment and fabrication methods for organic electronic devices. Review and original research papers are welcome.

Prof. Byung Jun Jung
Guest Editor

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 papers will be 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. Micromachines is an international peer-reviewed open access monthly 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 1600 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
  • Organic field effect transistor
  • Organic thin-film transistor
  • Organic memory
  • Organic memristor
  • Organic photovoltaic device
  • Organic thermoelectric device
  • Organic photodiode
  • Organic sensor

Published Papers (2 papers)

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Research

Open AccessArticle
Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
Micromachines 2020, 11(7), 650; https://doi.org/10.3390/mi11070650 - 30 Jun 2020
Abstract
Nowadays, the display industry is endeavoring to develop technology to provide large-area organic light-emitting diode (OLED) display panels with 8K or higher resolution. Although the selective deposition of organic molecules through shadow masks has proven to be the method of choice for mobile [...] Read more.
Nowadays, the display industry is endeavoring to develop technology to provide large-area organic light-emitting diode (OLED) display panels with 8K or higher resolution. Although the selective deposition of organic molecules through shadow masks has proven to be the method of choice for mobile panels, it may not be so when independently defined high-resolution pixels are to be manufactured on a large substrate. This technical challenge motivated us to adopt the well-established photolithographic protocol to the OLED pixel patterning. In this study, we demonstrate the two-color OLED pixels integrated on a single substrate using a negative-tone highly fluorinated photoresist (PR) and fluorous solvents. Preliminary experiments were performed to examine the probable damaging effects of the developing and stripping processes upon a hole-transporting layer (HTL). No significant deterioration in the efficiency of the develop-processed device was observed. Efficiency of the device after lift-off was up to 72% relative to that of the reference device with no significant change in operating voltage. The procedure was repeated to successfully obtain two-color pixel arrays. Furthermore, the patterning of 15 μm green pixels was accomplished. It is expected that photolithography can provide a useful tool for the production of high-resolution large OLED displays in the near future. Full article
(This article belongs to the Special Issue Organic Electronic Devices, Volume II)
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Open AccessFeature PaperArticle
Novel Hybrid Conductor of Irregularly Patterned Graphene Mesh and Silver Nanowire Networks
Micromachines 2020, 11(6), 578; https://doi.org/10.3390/mi11060578 - 09 Jun 2020
Abstract
We prepared the hybrid conductor of the Ag nanowire (NW) network and irregularly patterned graphene (GP) mesh with enhanced optical transmittance (~98.5%) and mechano-electric stability (ΔR/Ro: ~42.4% at 200,000 (200k) cycles) under 6.7% strain. Irregularly patterned GP meshes were prepared [...] Read more.
We prepared the hybrid conductor of the Ag nanowire (NW) network and irregularly patterned graphene (GP) mesh with enhanced optical transmittance (~98.5%) and mechano-electric stability (ΔR/Ro: ~42.4% at 200,000 (200k) cycles) under 6.7% strain. Irregularly patterned GP meshes were prepared with a bottom-side etching method using chemical etchant (HNO3). The GP mesh pattern was judiciously and easily tuned by the regulation of treatment time (0–180 min) and concentration (0–20 M) of chemical etchants. As-formed hybrid conductor of Ag NW and GP mesh exhibit enhanced/controllable electrical-optical properties and mechano-electric stabilities; hybrid conductor exhibits enhanced optical transmittance (TT = 98.5%) and improved conductivity (ΔRs: 22%) compared with that of a conventional hybrid conductor at similar TT. It is also noteworthy that our hybrid conductor shows far superior mechano-electric stability (ΔR/Ro: ~42.4% at 200k cycles; TT: ~98.5%) to that of controls (Ag NW (ΔR/Ro: ~293% at 200k cycles), Ag NW-pristine GP hybrid (ΔR/Ro: ~121% at 200k cycles)) ascribed to our unique hybrid structure. Full article
(This article belongs to the Special Issue Organic Electronic Devices, Volume II)
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