Special Issue "Optoelectronic Nanodevices"
A special issue of Nanomaterials (ISSN 2079-4991).
Deadline for manuscript submissions: 30 November 2018
Dr. Minas M. Stylianakis
B.Sc, M.Sc Chemistry, Un. Patras (Upatras) PhD, Un. of Crete (UOC) Technological Educational Institute (T.E.I) of Crete, Center of Materials Technology & Photonics Estavromenos P.B 1939, Heraklion, GR-71004, Crete, Greece
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Interests: graphene; 2D nanomaterials; materials science; chemistry; organic photovoltaics; perovskite solar cells
Over the last decade, graphene and beyond graphene nanomaterials (TMDs, Xenes) have centralized the interest of the scientific community, due to the extraordinary physical, optical, thermal, and electrical properties, which are correlated with their two-dimensional (2D) ultrathin atomic layer structure, large interlayer distance, ease of functionalization, as well as tunable bandgap. Therefore, potential applications in the fastest growing fields of energy (photovoltaics, energy storage, fuel cells, hydrogen storage, catalysis, etc.), electronics, photonics, spintronics and sensing have been developed. The continuous nanostructure-based applications development offers the confidence to significantly improve existing products and to enable the design of materials and devices with novel functionalities.
We invite investigators to submit original research articles, letters, as well as review articles and perspective views, on fundamental studies and optoelectronic applications of nanomaterials. The present Special Issue of Nanomaterials focuses on new insights demonstration, as well as the potential and challenges in the realization of various efficient optoelectronic devices, such as solar cells (OSCs, PeSCs), light emitting diodes (LEDs), sensors, photodetectors, etc., upon the incorporation of nanostructured materials.
Dr. Minas M. Stylianakis
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. Nanomaterials 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 1500 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.
- Optoelectronic devices
- Light Emitting Diodes
- Solar Cells
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Reinforced Field Emission Devices from Reduced Graphene Oxide Ink/Conductive Polymeric Composites
Authors: Minas Stylianakis 1,†,*, George Viskadouros 1, 2,†,*, Christos Polyzoidis 1, George Veisakis 1, Konstantinos Petridis 1,3 and Emmanuel Kymakis1
1 Center of Materials Technology and Photonics & Electrical Engineering Department, Technological Educational Institute (TEI) of Crete, Heraklion 71004 Crete, Greece; firstname.lastname@example.org (C.P.); email@example.com (G.V.); firstname.lastname@example.org (K.P.); email@example.com (E.K.)
2 Department of Mineral Resources Engineering, Technical University of Crete, Chania, 731 00, Crete, Greece
3 Department of Electronic Engineering Technological Educational Institute (TEI) of Crete, Chania 73132 Crete, Greece
* Correspondence: firstname.lastname@example.org (M.M.S.); email@example.com (G.V.); Tel.: +30-2810-379775 (M.M.S.)
† These authors contributed equally to this work.
Abstract: Hydroiodic acid (HI) treated - reduced graphene oxide (rGO) ink/conductive polymeric composites are considered as promising cold cathodes in terms of high geometrical aspect ratio and low field emission (FE) threshold devices. In this study, four simple, cost-effective, solution-processed approaches for rGO-based field effect emitters were developed, optimized and compared; rGO layers were coated on a) n+ doped Si substrate, b) n+-Si/P3HT:rGO, c) n+-Si/PCDTBT:rGO and d) n+-Si/PCDTBT:PC71BM:rGO composites, respectively. The fabricated emitters were optimized by tailoring the concentration ratios of their preparation and field emission characteristics. In a critical ratio, FE performance of the composite materials was remarkably improved compared to the pristine Si, as well as n+-Si/rGO field emitter. In this context, the impact of various materials, such as polymers, fullerene derivatives, as well as different solvents on rGO function reinforcement and consequently on FE performance, upon rGO-based composites preparation, was investigated. The field emitter consisted of n+-Si/PCDTBT:PC71BM(80%):rGO(20%)/rGO displayed a field enhancement factor of ∼2850, with remarkable stability over 20 h and low turn-on field in 0.6V/μm. High-efficiency graphene-based FE devices realization paves the way towards low-cost, large-scale electron sources development. Finally, the contribution of this hierarchical, composite film morphology was evaluated and discussed.
Keywords: field emission; graphene; reduced graphene oxide; polymer composites; graphene ink; cold cathode; Fowler-Nordheim
Title: Controllable Synthesis of 2D Perovskite on Different Substrates and Its Application as Photodetector
Author: Shaojuan Li
Abstract: The excellent photovoltaic and photoelectric properties of perovksites have generated growing interest for diverse optoelectronic applications. These applications place extreme demands on device performance that highly depends on the perovskite material properties. However, the widely used spin-coating perovskite compound solution method can only prepare polycrystalline perovskite and physical vapor deposition (PVD) method requires a higher melting point (>350 oC) substrate due to the high growth temperature, which is not suitable for low melting point substrates, especially for flexible substrates. Here, we present the controlled synthesis of high quality two-dimensional (2D) perovskite platelets on SiO2/Si, Si, mica, glass and flexible polydimethylsiloxane (PDMS) substrates, and our method is applicable to any substrate as long as its melting point is higher than 100 oC. We found that the PL characteristics of perovskite depend strongly on the platelets thickness, namely, thicker peroskite platelet has higher PL wavelength and stronger intensity, and thinner perovskite exhibits opposite results. Moreover, photodetectors based on the as-produced perovskite platelets show excellent photoelectric performance with a high photoresponsivity of 8.3 AW-1, a high on/off ratio of ~103, and a small rise and decay time of 30 and 50 ms, respectively. Our approach in this work provides a feasible way for making 2D perovskite platelets for wide optoelectronic applications.