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One- and Two-Dimensional Architectures for Electronic and Optoelectronic Devices

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: closed (10 November 2023) | Viewed by 3257

Special Issue Editors

Electricity, Solid State Physics, and Biophysics Department, Faculty of Physics, University of Bucharest, 90 Panduri Road, 050663 Bucharest, Romania
Interests: nanomaterials; nanostructures; nanotechnologies; 2D architectures; organic/inorganic thin films; electronic/optoelectronic devices
Special Issues, Collections and Topics in MDPI journals
National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, 405A Atomistilor Street, 077125 Magurele-Bucharest, Romania
Interests: optical characterization; organic solar cells; UV nanoimprint; thin films; vacuum evaporation; spin-coating; Langmuir–Blodgett; photonic crystals

Special Issue Information

Dear Colleagues,

Miniaturization and nano-building are two of the most spoken words in the area of preparation materials for electronic and optoelectronic applications. Even if the interest is in fabricating flexible electronic devices, thin-film transistors, or sensing tools, or if the attention is focused on the production of light-emitting diodes, photovoltaic structures, or solar cells, the main goals are related to small dimensions and high efficiency. One- and two-dimensional architectures offer various possibilities to realize small sizes and high performance with large active areas, easily tunable processes, and numerous physical and chemical deposition/growth techniques (including but not limited to solution-based methods, thermal evaporation, magnetron sputtering, and atomic layer deposition). Special consideration has been paid to the theoretical/computational path (the R-matrix method, density functional theory, SIESTA, etc.) because it provides valid optimization, validation, and starting points for future studies. 

This Special Issue is focused on (but not limited to) the relation between 1D and 2D architectures and electronic and optoelectronic devices, including both experimental and theoretical approaches.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Sorina Iftimie
Dr. Oana Rasoga
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. 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

  • nanomaterials
  • nanowires and nanotubes
  • thin films
  • composite materials
  • electronic and optoelectronic devices
  • R-matrix, DFT, and SIESTA
  • solution-based methods
  • thermal evaporation and magnetron sputtering
  • atomic layer deposition

Published Papers (2 papers)

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Research

22 pages, 5673 KiB  
Article
Effects of Solvent Additive and Micro-Patterned Substrate on the Properties of Thin Films Based on P3HT:PC70BM Blends Deposited by MAPLE
by Marcela Socol, Nicoleta Preda, Carmen Breazu, Gabriela Petre, Anca Stanculescu, Ionel Stavarache, Gianina Popescu-Pelin, Andrei Stochioiu, Gabriel Socol, Sorina Iftimie, Christine Thanner and Oana Rasoga
Materials 2023, 16(1), 144; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16010144 - 23 Dec 2022
Viewed by 1202
Abstract
Lately, there is a growing interest in organic photovoltaic (OPV) cells due to the organic materials’ properties and compatibility with various types of substrates. However, their efficiencies are low relative to the silicon ones; therefore, other ways (i.e., electrode micron/nanostructuring, synthesis of new [...] Read more.
Lately, there is a growing interest in organic photovoltaic (OPV) cells due to the organic materials’ properties and compatibility with various types of substrates. However, their efficiencies are low relative to the silicon ones; therefore, other ways (i.e., electrode micron/nanostructuring, synthesis of new organic materials, use of additives) to improve their performances are still being sought. In this context, we studied the behavior of the common organic bulk heterojunction (P3HT:PC70BM) deposited by matrix-assisted pulsed laser evaporation (MAPLE) with/without 0.3% of 1,8-diiodooctane (DIO) additive on flat and micro-patterned ITO substrates. The obtained results showed that in the MAPLE process, a small quantity of additive can modify the morphology of the organic films and decrease their roughness. Besides the use of the additive, the micro-patterning of the electrode leads to a greater increase in the absorption of the studied photovoltaic structures. The inferred values of the filling factors for the measured cells in ambient conditions range from 19% for the photovoltaic structures with no additive and without substrate patterning to 27% for the counterpart structures with patterning and a small quantity of additive. Full article
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10 pages, 2454 KiB  
Article
Optoelectronic Properties of α-MoO3 Tuned by H Dopant in Different Concentration
by Xi Huang, Xin Xu, Jiawei Huang, Zheyu Zhang, Yujia Gao, Zhengli Lu, Zhenyuan Wu, Tian Luo, Yating Cai, Yating Qu, Pengyi Liu, Cuiying Hu, Tingting Shi and Weiguang Xie
Materials 2022, 15(9), 3378; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15093378 - 08 May 2022
Cited by 3 | Viewed by 1430
Abstract
The optoelectronic properties of layered α-MoO3 are greatly limited due to its wide band gap and low carrier concentration. The insertion of hydrogen (H) can effectively tune the band structure and carrier concentration of MoO3. Herein, first-principles calculations were performed [...] Read more.
The optoelectronic properties of layered α-MoO3 are greatly limited due to its wide band gap and low carrier concentration. The insertion of hydrogen (H) can effectively tune the band structure and carrier concentration of MoO3. Herein, first-principles calculations were performed to unravel the physical mechanism of a H-doped α-MoO3 system. We found that the modulation of the electronic structure of H-doped MoO3 depends on the doping concentration and position of the H atoms. It was found that the band gap decreases at 8% doping concentration due to the strong coupling between Mo-4d and O-2p orbits when H atoms are inserted into the interlayer. More interestingly, the band gap decreases to an extreme due to the Mo-4d orbit when all the H atoms are inserted into the intralayer only, which has a remarkable effect on light absorption. Our research provides a comprehensive theoretical discussion on the mechanism of H-doped α-MoO3 from the doping positions and doping concentrations, and offers useful strategies on doping modulation of the photoelectric properties of layered transition metal oxides. Full article
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