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Organic Electronics: Synthesis, Properties, and Applications
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Organic Electronics: Synthesis, Properties, and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (10 January 2022) | Viewed by 6668

Special Issue Editor

Dr. Dalius Gudeika

E-Mail Website
Guest Editor
Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, Kaunas, Lithuania
Interests: organic materials; synthesis; physicochemical properties; optical and spectroscopic properties; biomedicine; bioimaging; bio-related application; material characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Semiconductor technologies that drive electronic appliances and devices such as computers, tablets, TV displays, and cell phones have been evolving rapidly. The pursuit of lightweight, thinner, high-image-resolution, energy-saving displays and devices has encouraged scientists around the world to find new materials and combinations. In this respect, organic semiconductors have been extensively studied in the last two decades because of their low processing requirements, versatility, flexibility, and environment-friendly characteristics.

In the last decade, there has been a tremendously growing effort aimed at integrating organic materials into electronic devices such as organic field effect transistors (OFETs), organic light emitting diodes (OLEDs), organic solar cells (OSCs), sensors, etc.

Today, OLED displays can be found everywhere—for example, in smartphones, TVs, smartwatches, monitors, cars, or digital cameras. However, as technology advances, the need for better OLED materials which help to improve energy efficiency and resolution of OLED displays is growing. Academic research has demonstrated many improvements regarding the efficiency of blue, red, green OLEDs using phosphorescent or thermally activated delayed (TADF) materials.

We invite colleagues whose work is primarily interdisciplinary and focused on materials and phenomena related to organic devices, such as organic light emitting diodes, thin film transistors, photovoltaic cells, etc., to contribute to this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Dalius Gudeika
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 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. Materials 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 2600 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 chemistry
  • physics
  • optoelectronics
  • TADF
  • OLED
  • solar cells
  • thin film transistors

Published Papers (3 papers)

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Research

14 pages, 2024 KiB  
Article
Effects of Ionic Liquid, 1-Ethyl-3-methylimidazolium Chloride ([EMIM]Cl), on the Material and Electrical Characteristics of Asphaltene Thin Films
by Sundarajoo Thulasiraman, Noor Mona Md Yunus, Pradeep Kumar, Zayyan Rafi Kesuma, Nadia Norhakim, Cecilia Devi Wilfred, Teuku Muhammad Roffi, Mohamad Faizal Hamdan and Zainal Arif Burhanudin
Materials 2022, 15(8), 2818; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15082818 - 12 Apr 2022
Cited by 6 | Viewed by 1756
Abstract
Asphaltene is a component of crude oil that has remained relatively unexplored for organic electronic applications. In this study, we report on its extraction technique from crude oil tank bottom sludge (COTBS) and its thin-film characteristics when 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) ionic liquid (IL) [...] Read more.
Asphaltene is a component of crude oil that has remained relatively unexplored for organic electronic applications. In this study, we report on its extraction technique from crude oil tank bottom sludge (COTBS) and its thin-film characteristics when 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) ionic liquid (IL) was introduced as dopants. The extraction technique yielded asphaltene with more than 80% carbon content. The IL resulted in asphaltene thin films with a typical root-mean-square surface roughness of 4 nm, suitable for organic electronic applications. The thin films each showed an optical band gap of 3.8 eV and a sheet resistance as low as 105 Ω/□. When the film was used as a conductive layer in organic field-effect transistors (OFET), it exhibited hole and electron conduction with hole (µh) and electron (µe) mobilities in the order of 10−8 and 10−6 cm2/Vs, respectively. These characteristics are just preliminary in nature. With the right IL, asphaltene thin films may become a good alternative for a transport layer in organic electronic applications. Full article
(This article belongs to the Special Issue Organic Electronics: Synthesis, Properties, and Applications)
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13 pages, 3329 KiB  
Article
Aggregate Formation of Boron-Containing Molecules in Thermal Vacuum Deposited Films
by Oleksandr Navozenko, Valeriy Yashchuk, Oleksiy Kachkovsky, Dalius Gudeika, Rita Butkute, Yuriy Slominskii and Volodymyr Azovskyi
Materials 2021, 14(19), 5615; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14195615 - 27 Sep 2021
Viewed by 1471
Abstract
The spectral properties of new boron-containing dyes were studied. One-component (pure dyes) and composite “Alq3+dye” thin films were fabricated using the thermal vacuum deposition method. The positions of the transmission spectra maxima in a one-component film are different for different film [...] Read more.
The spectral properties of new boron-containing dyes were studied. One-component (pure dyes) and composite “Alq3+dye” thin films were fabricated using the thermal vacuum deposition method. The positions of the transmission spectra maxima in a one-component film are different for different film thicknesses. The best correlation of the maxima positions of the dye transmission spectra in solid and liquid solutions was observed for thicknesses of films close to a few (up to 10) monolayers. On the other hand, the absorption spectra maxima positions of one-component dye films (upper 10 nm) and composite films with high concentration, did not match the corresponding positions of absorption spectra maxima recorded in solutions. Comparison of the absorption spectra in one-component dye films and in solutions indicates the presence of both monomers and their aggregates in one-component films (contrary to solutions where such processes of aggregation do not take place, even at very high concentrations). Simultaneously with aggregation manifestation in the absorption spectra, the intensity of fluorescence of one-component dye films dramatically decreases. A quantum chemical simulation of the possible relative arrangement of two dye molecules indicates that the most possible of the simplest types of aggregates are physical dimers. Films of practical importance (due to efficient energy transfer from host to guest molecules when all singlet excitons are captured) possess a high quantum yield of fluorescence when reaching an impurity concentration of a few percent (aggregation does not take place yet). Full article
(This article belongs to the Special Issue Organic Electronics: Synthesis, Properties, and Applications)
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15 pages, 6194 KiB  
Article
Towards the Bisbenzothienocarbazole Core: A Route of Sulfurated Carbazole Derivatives with Assorted Optoelectronic Properties and Applications
by Roger Bujaldón, Joaquim Puigdollers and Dolores Velasco
Materials 2021, 14(13), 3487; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14133487 - 23 Jun 2021
Cited by 6 | Viewed by 2164
Abstract
Ladder-type molecules, which possess an extended aromatic backbone, are particularly sought within the optoelectronic field. In view of the potential of the 14H-bis[1]benzothieno[3,2-b:2’,3’-h]carbazole core as a p-type semiconductor, herein we studied a set of two derivatives featuring [...] Read more.
Ladder-type molecules, which possess an extended aromatic backbone, are particularly sought within the optoelectronic field. In view of the potential of the 14H-bis[1]benzothieno[3,2-b:2’,3’-h]carbazole core as a p-type semiconductor, herein we studied a set of two derivatives featuring a different alkylation patterning. The followed synthetic route, involving various sulfurated carbazole-based molecules, also resulted in a source of fluorophores with different emitting behaviors. Surprisingly, the sulfoxide-containing fluorophores substantially increased their blue fluorescence with respect to the nearly non-emitting sulfur counterparts. On this basis, we could shed light on the relationship between their chemical structure and their emission as an approach for future applications. Considering the performance in organic thin-film transistors, both bisbenzothienocarbazole derivatives displayed p-type characteristics, with hole mobility values up to 1.1 × 10−3 cm2 V−1 s−1 and considerable air stability. Moreover, the role of the structural design has been correlated with the device performance by means of X-ray analysis and the elucidation of the corresponding single crystal structures. Full article
(This article belongs to the Special Issue Organic Electronics: Synthesis, Properties, and Applications)
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