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    Synthesis and Characterization of ZnO for Electron Transport Layer in Perovskite and CIGS Solar Cells

    , M.Sc. Thesis Sharif University of Technology Rasti, Noushin (Author) ; Taghavinia, Nima (Supervisor) ; Dehghani, Mehdi (Supervisor)
    The purpose of this study is the fabrication and characterization of ZnO nano particles and the application of ZnO in solar cells. Therefore, firstly we fabricate the high stable solution of ZnO nano particles and then characterize ZnO nano particles. In addition, we study sulfurzation and selenization of zinc oxide thin films. We use ZnO nano particles for fabrication of transparent conductive films. Transparent conductive films have many applications such as touch panels, displays and solar cells. The most applicable transparent conductive electrode is indium tin oxide , which is the most expensive layer in solar cells. But silver nanowires has some challenges such as high surface... 

    Deposition of Absorber layer of Copper Indium Gallium Di-Selenide with Solution based Method for Solar Cell Applications

    , M.Sc. Thesis Sharif University of Technology Salmani Mashkani, Farid (Author) ; Taghavinia, Nima (Supervisor) ; Dehghani, Mehdi (Supervisor)
    In recent years, the use of thin film solar cells has been widely considered due to the ability of their solution-based coatings. One of these is the chalcopytie solar cell copper indium gallium di-selenide (CIGS). The absorber layer of copper indium gallium diselenide was carried out by a spray pyrolysis method. then by using a chemical bath deposition, a buffer layer was fabricated to form the p-n junction. Subsequently, silver nanoparticles and zinc oxide alumina sputtering were used to form a transparent conductive film. with using the substrate Molybdenum and by optimizing the test conditions, such as temprature and deposition time to adjust thickness of layers, Cell with an... 

    Preparation of Colloidal Chalcopyrite Nanoparticles Aimed for Device-Quality Thin Films Used in Solar Cell Applications

    , M.Sc. Thesis Sharif University of Technology Khosroshahi, Rouhollah (Author) ; Taghavinia, Nima (Supervisor) ; Bagherzadeh, Mojtaba (Supervisor)
    In this research, the technology of fabrication and deposition of nanoparticle inks from chalcogenide compounds and then use of them in the fabrication of CuInGaS2 and Perovskite thin-film solar cells have been considered. In the first step, the synthesis of CuInGaS2 family compounds with variable In / Ga ratio and also the change of the stoichiometric ratio of Cu component using oleylamine solvent is investigated. In addition to these compounds, the synthesis of CuSnS, CuBaSnS, and CuZnSnS nanoparticles is also investigated. The synthesized nanoparticles were analyzed by XRD, DLS, UV-Vis, ICP, PL, SEM, EDX, and TEM. Then, the stability of the ink made of CuInGaS2 nanoparticles in different... 

    Modeling and technical-economic optimization of electricity supply network by three photovoltaic systems

    , Article Journal of Solar Energy Engineering, Transactions of the ASME ; Vol. 136, issue. 2 , 2014 ; ISSN: 0199-6231 Safarian, S ; Khodaparast, P ; Kateb, M ; Sharif University of Technology
    To attain an ongoing electricity economy, developing novel widespread electricity supply systems based on diverse energy resources are critically important. Several photovoltaic (PV) technologies exist, which cause various pathways to produce electricity from solar energy. This paper evaluates the competition between three influential solar technologies based on photovoltaic technique to find the optimal pathways for satisfying the electricity demand: (1) multicrystalline silicon; (2) copper, indium, gallium, and selenium (CIGS); and (3) multijunction. Besides the technical factors, there are other effective parameters such as cost, operability, feasibility, and capacity that should be... 

    Optimization of CuIn1-XGaXS2 Nanoparticles and Their Application in the Hole-Transporting Layer of Highly Efficient and Stable Mixed-Halide Perovskite Solar Cells

    , Article ACS Applied Materials and Interfaces ; Volume 11, Issue 34 , 2019 , Pages 30838-30845 ; 19448244 (ISSN) Khorasani, A ; Marandi, M ; Khosroshahi, R ; Malekshahi Byranvand, M ; Dehghani, M ; Zad, A. I ; Tajabadi, F ; Taghavinia, N ; Sharif University of Technology
    American Chemical Society  2019
    Inorganic hole-transport materials (HTMs) have been frequently applied in perovskite solar cells (PSCs) and are a promising solution to improve the poor stability of PSCs. In this study, we investigate solution-processed copper indium gallium disulfide (CIGS) nanocrystals (NCs) as a dopant-free inorganic HTM in n-i-p type PSCs. Moreover, Cs0.05(MA0.17-FA0.83)0.95Pb(I0.83Br0.17)3 mixed-halide perovskite with proper crystalline quality and long-time stability was utilized as the light-absorbing layer under ambient conditions. To optimize the cell performance and better charge extraction from the perovskite layer, the Ga concentration in the Cu(In1-XGaX)S2 composition was changed, and the X...