OAJ Materials and Devices http://caip.co-ac.com/index.php/materialsanddevices <p>Materials and Devices is an Open Access journal managed by academics, which publishes original, and peer-reviewed papers accessible only via internet, freely for all. Your published article can be freely downloaded, and self archiving of your paper is allowed and encouraged!</p> <p>The topics covered by the journal are wide, Materials and Devices aims at publishing papers on all aspects of studies on materials, and related devices. This includes solid state physics and chemistry, chemical physics, materials science, microelectronics, photonics,... and all types of materials.</p> <p>Papers on biomaterials, geomaterials, archeomaterials or on studies of ancient materials are also welcome. A particular attention is also paid on environmental studies related with materials and on materials relevant to environment preservation.</p> <p>Authors are also encouraged to submit papers on theoretical studies applied to materials, including pure mathematical approaches, physical approaches, models, numerical simulations, etc.</p> <p>We apply « the principles of transparency and best practice in scholarly publishing» as defined by the Committee on Publication Ethics (COPE).<br /><br />Materials and Devices is now indexed by the DOAJ and published articles receive a DOI. </p> <p>Articles are published under the responsability of authors, in particular concerning the respect of copyrights; we ask authors to consider this point very seriously because any figure (or table) already published (even by the author himself) in another journal is generally submitted to copyrights. In that case authors should ask for permission to reproduce the figure in his article.</p> <p>Another very important point is plagiarism. Authors should be careful not to plagiarize other works; we check articles for plagiarism, and authors who would submit a plagiarized article (or partially plagiarized) will be bannished from the journal.</p> <p>Readers are aware that the contents of published articles may involve hazardous experiments if reproduced; the reproduction of experimental procedures described in articles is under the responsability of readers and their own analysis of potential danger.</p> <p><strong>Downloads: <a href="http://co-ac.com/wp-content/uploads/2019/05/Flier-MatDev2019.pdf">Flier of the journal </a> Article templates:</strong> there is a special template for review articles, other types of articles may be edited with the general template. See the last issue of the journal to get the updated templates, containing also instructions for authors.</p> Collaborating Academics en-US OAJ Materials and Devices 2495-3911 <p><strong>Authors who publish with this journal agree to the following terms:</strong><br /><br /></p> <ol type="a"> <ol type="a"> <li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License ( <a href="http://creativecommons.org/licenses/by-nc-nd/4.0/" rel="license">Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licens</a>e) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li>To the extent transferable, copyright in and to the undersigned article is hereby assigned to Collaborating Academics and Open Access Journal Materials and Devices (ISSN: 2495-3911) for publication in the website of the journal and as part of a book (eventually a special volume) that could be produced in a printed and/or an electronic form.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a style="background-color: #ffffff;" href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li> <li>Figures, tables, and other information present in articles published in the OAJ Materials and Devices may be reused without permission, provided the citation of original article is made in figure's or table's caption.</li> </ol> </ol> Perovskites and other framework structure materials (Book's first pages and Preface) http://caip.co-ac.com/index.php/materialsanddevices/article/view/122 <p>Perovskites are among the most famous materials due to their exceptional properties: they present nearly all existing types of interesting properties, in particular as ferroics or multiferroics, they may be insulators, (super)conductors, or semiconductors, magnetoresistant, they are used in numerous devices, they present hundreds of variants and different crystalline phases and phase transitions, and recently appeared as probably the most promising materials for photovoltaics. With a crystal structure characterized by octahedra that share their corners, these materials belong to the wider category of « Framework Structure (FWS) materials » the structure of which is based on units (octahedra, tetrahedra, …) that share some of their corners (or edges) with their neighbours. This particular feature of FWS materials confers to them unique properties. This review volume is constituted of 26 chapters on different aspects, and is divided in two parts, « Fundamental aspects and general properties », and « Elaborated materials and applied properties ». Its main purpose is to attempt to identify the properties common to all members of the vast family of FWS materials, and understand their differences. Besides perovskites, derived compounds as 2D perovskites, Dion-Jacobson, Ruddlesden-Popper, Aurivillius, tungsten-bronzes, and others, are presented, and their preparation and/or properties as single crystals, ceramics, thin films, multilayers, nanomaterials, nanofibers, nanorods, etc, are discussed. We focus on new trends and important recent developments by leaving somewhat aside more classical aspects which can be easily found in older textbooks or review articles. Among most recent applications, this volume focuses on applications related with interactions with other molecules, on photovoltaics, and on memories, with a special attention to perovskite solar cells that have certainly attracted the most attention of researchers in recent years, opening extremely promising routes in photovoltaics.</p> <p>In conclusion, this book presents a collection of texts elucidating various aspects of the relation between structural organization (including dynamical aspects) and singular properties of framework crystals; it proposes a reasonable balance between experimental and theoretical results, and between fundamental aspects and applied properties.</p> <p>This volume can be approached on several levels (each chapter initially assumes that the reader is not a specialist in the subject, and is presented in a pedagogical way) : it is accessible to master or doctoral students, as well as to researchers who want to have informations on recent developments, who will find excellent detailed introductions up to hotsubjects. It may also be used by undergraduate students who should approach given subjects. The volume contains 800 pages written by about 70 authors from different countries, it has an index, and is completed by numerous figures to illustrate the text.</p> Pierre Saint Gregoire Mikhail Smirnov Copyright (c) 2021 Pierre Saint Gregoire; Mikhail Smirnov https://creativecommons.org/licenses/by-nc-nd/4.0 2021-01-19 2021-01-19 5 1 Graphene-titanate photocatalyst and its use in an air purifying device - prototype demonstration in operational environment http://caip.co-ac.com/index.php/materialsanddevices/article/view/123 <p class="western" lang="es-ES" align="justify"><sub><span style="font-family: Arial, sans-serif;"><span style="font-family: Verdana, sans-serif;"><span lang="en-US">Volatile organic compounds constitute a group of dangerous air pollutants, which can be eliminated by the photocatalytic route. In this work we demonstrated the hydrothermal synthesis of photocatalytic composite CTO-RGO based on copper titanate and reduced graphene oxide. </span></span><span style="color: #000000;"><span style="font-family: Verdana, sans-serif;"><span lang="en-US">The m</span></span></span><span style="font-family: Verdana, sans-serif;"><span lang="en-US">aterial is composed of three phases namely rutile, tenorite and reduced graphene oxide, and it shows absorption in a broad range of light (ultraviolet and visible light). CTO-RGO showed an excellent photocatalytic activity in a laboratory scale experiment. Therefore it has been used as an active material in air purifying devices. A prototype was tested in operational environments such as apartment, fitness center and industrial places. Obtained results confirmed the significant decrease of VOC level due to photocatalytic degradation of pollutants.</span></span></span></sub></p> Tomasz Baran Szymon Wojtyła Copyright (c) 2021 Tomasz Baran, Szymon Wojty?a https://creativecommons.org/licenses/by-nc-nd/4.0 2021-03-12 2021-03-12 5 1 THEORETICAL STUDY OF SPECTRAL RESPONSES OF HETEROJONCTIONS BASED ON CuInSe2 and CuInS2 http://caip.co-ac.com/index.php/materialsanddevices/article/view/120 <p>In this work we study the spectral responses of thin films solar cells of heterojunctions based on CuInSe<sub>2</sub> and CuInS<sub>2</sub>. Four-layer structures are studied according to the n<sup>+</sup>n/pp<sup>+</sup> model. First we consider the structure&nbsp; ZnO(n<sup>+</sup>)/CdS(n)/CuInS<sub>2</sub>(p)/CuInSe<sub>2</sub>(p<sup>+</sup>) where CuInS<sub>2</sub> represent the base and CuInSe<sub>2</sub> the substrate in this model. Secondly we consider the structure ZnO(n<sup>+</sup>)/CdS(n)/CuInSe<sub>2</sub>(p)/ CuInS<sub>2</sub>(p<sup>+</sup>), for this model CuInSe<sub>2</sub> represent the base and CuInS<sub>2</sub> the substrate. ZnO and CdS are used as window layers in each structure. Using the continuity equation that governs transport of carriers in semiconductor material, models for calculating spectral responses are proposed for heterojunctions type n<sup>+</sup>n/pp<sup>+</sup> based on CuInSe<sub>2</sub> and CuInS<sub>2</sub>. For each structure we have presented the energy band diagram based on the Anderson model [1] and determined the expression of the photocurrent. The theoretical results obtained allow to compare the performances of these two models by optimizing the different parameters of each structure (base thickness, diffusion length, recombination velocity at the interface, etc.) in order to improve the overall efficiency of the collection of carriers.</p> elou keita B. ndiaye M. Dia Y. Tabar C. Sene B. Mbow Copyright (c) 2020 elou keita, Dr B. ndiaye, Dr M. Dia, Dr Y. Tabar, Dr C. Sene, Dr B. Mbow https://creativecommons.org/licenses/by-nc-nd/4.0 2020-08-19 2020-08-19 5 1 New template and instructions to authors http://caip.co-ac.com/index.php/materialsanddevices/article/view/107 <p>This document is the new template that may be used to generate manuscripts. However, its use is not required from now, to avoid time losses to authors: it is possible to submit an unformatted manuscript for scientific evaluation. One your article is accepted, you will be asked to upload a version edited using the template.</p> <p>Authors may find general instructions in this template to submit their manuscript.</p> Pierre SAINT-GREGOIRE Copyright (c) 2020 Pierre SAINT-GREGOIRE https://creativecommons.org/licenses/by-nc-nd/4.0 2020-07-08 2020-07-08 5 1 New template for review article http://caip.co-ac.com/index.php/materialsanddevices/article/view/108 <p>This file may be used to generate a review article to be submitted to the journal. It contains also instructions to authors intending to submit a review article.</p><p>However in order to save time to authors, we decided to accept submissions not following any template (continue reading the contents of this template...)</p> Pierre SAINT-GREGOIRE Copyright (c) 2020 Pierre SAINT-GREGOIRE 2020-01-15 2020-01-15 5 1 Organic materials based on thiophene and benzothiadiazole for organic solar cells. Computational investigations http://caip.co-ac.com/index.php/materialsanddevices/article/view/104 <span lang="ES">In this paper, wepresent new organics chemical structures of pendant phenyl ester-substituted thiophene and benzothiadiazole based copolymers leading to donor (D)-acceptor (A) structure-types. Geometrics and photo-physical properties of the studied chemical structure are exploited in the further ground and excited-state. Theoretically, using the DFT and TD-DFT quantum chemical calculation implanted in Gaussian09 software, geometrical and electronic parameters such as the energy of HOMO and LUMO level, the Egap= EHomo- E Lumo and focused electronic parameters of the molecules were determined. It is obvious that the studied molecules show good photovoltaic properties. Thus, studied chemical structures are blended with acceptor compounds such as fullerene and PCBM derivatives in bulk-heterojunction solar cell. Quantic chemical calculations show that the studied compound present good electronic, optical and photovoltaic properties and can be used as potential electron donors in organic solar cells Heterojunction (BHJ).</span> Mohammed Bouachrine Rched Kacimi Mourad Chemek Ahmed Azaid Mohammed Bennani Lahcen Bejjit Copyright (c) 2020 Mohammed Bouachrine, Rched Kacimi, Mourad Chemek, Ahmed Azaid, Mohammed Bennani, Lahcen Bejjit 2020-05-19 2020-05-19 5 1