International Conference

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Author: search.filters.author.Deepika R

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    CU2FESNS4 (CFTS) NANOPARTICLES: POTENTIAL PHOTOVOLTAIC ABSORPTION MATERIALS FOR SOLAR CELL APPLICATION
    (National Institute of Technology, Tiruchirapalli, 2019-09-09) Deepika R; Meena P
    Nanoparticles of the environmentally benign Cu-based quaternary chalcogenide compound Cu2FeSnS4 (CFTS) were successfully synthesized and the powder coated as a thin film on a FTO substrate by spin coating. The CFTS nanoparticles were prepared by a simple, low cost hydrothermal reaction method. The prepared samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis spectroscopy and Field emission scanning electron microscopy with energy dispersive spectroscopy (FESEM – EDX). The results of the analyses confirm that the obtained nanoparticles are high crystalline with pure tetragonal structure. Morphological images show that the CFTS nanoparticles are closely packed with slight agglomeration. UV-Vis absorption spectrum revealed that the nanoparticles have a strong absorption band in the visible region with a band gap of 1.32 eV, which indicates their potential as promising materials for photovoltaic application. In the present study, the fabrication of CFTS based solar cells of layer configuration FTO/ZnO/CdS/CFTS has been reported. The fabricated solar cell was characterized by current- voltage (I-V) measurements under simulated AM 1.5 illumination.
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    PREPARATION AND PROPERTIES OF QUATERNARY SEMICONDUCTOR CU2NISNS4 (CNTS)) NANOPARTICLES FOR POTENTIAL SOLAR ABSORBER MATERIALS
    (SRM Institute of Science and Technology, 2019-01-28) Deepika R; Meena P
    Phase pure Cu2ZnSnS4 (CZTS) and its related quaternary chalcogenides are promising material for photovoltaic applications. The incorporation of transition metal cations into any semiconductor systems may led to very interesting physical and chemical properties which make them suitable for applications in optoelectronic devices. In this study, a novel synthesis of Cu2NiSnS4 (CNTS) quaternary nanoparticles by the facile Chemical Route Method. The structural, morphological, optical and electrical characteristics of the synthesized nanoparticles have been analyzed. The results obtained confirm the formation of phase pure CNTS nanoparticles. The average size of the synthesized nanoparticles is estimated to be around 30nm. The obtained optical band gap of the CNTS nanoparticles are in good agreement with the optimum value required for an absorber material in photovoltaic solar energy-conversions. This study shows the viability of synthesizing nanoparticles with elements which are abundantly available by using an environmentally-friendly and low cost process which is potential for energy- conversion applications.
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    COLLOIDAL CHEMICAL SYNTHESIS OF TERNARY SEMICONDUCTOR CU2SNS4 (CTS) NANOPARTICLES FOR POTENTIAL SOLAR ENERGY ABSORBER MATERIALS
    (Institute of science and technology, Jawaharlal Nehru Technology University, Hyderabad, 2018-10-04) Deepika R; Jincy C.S; Meena P
    Ternary semiconductor Cu2SnS4 (CTS) nanoparticles have been synthesized by the facileChemical Route Method. Structural, morphological and optical characterization studies of the synthesized CTS nanoparticles have been performed by X-ray diffraction (XRD), Raman Spectroscopy, Energy Dispersive Spectroscopy (EDS), Scanning Electron Microscope (SEM)and UV-VIS Spectroscopy (UV). XRD and Raman spectroscopy are used to confirm the structure and phase. Based on the EDS result, the stoichiometry of the Cu2SnS4 (CTS) was determined and the elemental distribution studied by mapping analysis. The optical absorption studies revealed that the CTS nanoparticles have direct optimal band gap in the range from 1.29 to 1.5eV, which indicates that these nanoparticles are potential absorber materials for thin film photovoltaic applications. The synthesized CTS nanoparticles can be transformed to the ink form, which can be used to directly coat large area thin film solar cells.
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    STUDIES ON SYNTHESIS AND CHARACTERIZATION OF CUSNANOPARTICLES
    (PSGR Krishnammal College for Women, Coimbatore, 2018-01-03) Deepika R; Meena P; Mythili A.R
    Copper sulfide nanoparticles which are promising materials with potential applications in solar energy conversion, catalysis, sensing etc., have attracted the interest of researchers in view of their non-toxic nature. In the present study, CuS nanoparticles have been synthesized by the facile Chemical Route method which has received much attention due to the simple operation, low cost, faster reaction rate, high yield, environmental safety, and low energy consumption. The synthesized nanoparticles have been characterized by X-Ray diffraction (XRD), Scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDAX) and UV-VIS spectrophotometry.
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    PREPARATION AND CHARACTERIZATION OF ENVIRONMENTALLY SAFE TIN SULFIDE(SNS) NANOPARTICLES
    (PSGR Krishnammal College for Women, Coimbatore, 2018-01-03) Deepika R; Meena P; JosephineVincy P
    Nanoparticles of tinsulfide (SnS), are environmentally safe materials which are important as they are employed in optoelectronic devices.The band gap of SnS which is a binary semiconductor compound is about 1.3 eV, which is close to the optimum value required for the efficient sunlight absorption. SnS layers are used to enhance the efficiency of solar cells. In the present study,SnS nanoparticles have been synthesised by chemical route method. Structural, morphological and optical properties have been investigated with the help of X-ray diffraction technique (XRD), scanning electron microscope (SEM) with energy dispersive X-ray analysis (EDAX) and ultra-violet visible (UV) analysis.