OAJ Materials and Devices 2020-08-05T19:12:02+00:00 Pierre Saint-Gregoire Open Journal Systems <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="">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> THEORETICAL STUDY OF SPECTRAL RESPONSES OF HETEROJONCTIONS BASED ON CuInSe2 and CuInS2 2020-08-05T19:12:02+00:00 elou keita B. ndiaye M. Dia Y. Tabar C. Sene B. Mbow <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> 2020-08-19T00:00:00+00:00 Copyright (c) 2020 elou keita, Dr B. ndiaye, Dr M. Dia, Dr Y. Tabar, Dr C. Sene, Dr B. Mbow New template and instructions to authors 2020-05-19T23:27:24+00:00 Pierre SAINT-GREGOIRE <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> 2020-07-08T00:00:00+00:00 Copyright (c) 2020 Pierre SAINT-GREGOIRE New template for review article 2020-05-19T23:27:24+00:00 Pierre SAINT-GREGOIRE <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> 2020-01-15T00:00:00+00:00 Copyright (c) 2020 Pierre SAINT-GREGOIRE Organic materials based on thiophene and benzothiadiazole for organic solar cells. Computational investigations 2020-05-19T23:27:24+00:00 Mohammed Bouachrine Rched Kacimi Mourad Chemek Ahmed Azaid Mohammed Bennani Lahcen Bejjit <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> 2020-05-19T00:00:00+00:00 Copyright (c) 2020 Mohammed Bouachrine, Rched Kacimi, Mourad Chemek, Ahmed Azaid, Mohammed Bennani, Lahcen Bejjit