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24 results on '"Thevenin, A."'

21. Synthesis and characterization of sprayed CIGS thin films for photovoltaic application

Author

B. Hartiti, Salah Fadili, A. Kotbi, Abderraouf Ridah, Hicham Labrim, and Philippe Thevenin

Subjects
010302 applied physics, Materials science, Band gap, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Copper indium gallium selenide solar cells, symbols.namesake, chemistry, Sputtering, 0103 physical sciences, symbols, Thin film, Gallium, 0210 nano-technology, Raman spectroscopy, Spectroscopy, Sheet resistance
Abstract

CuInGaS2 (CIGS) absorber materials were synthesis by spray pyrolysis on glass substrates, using special concentrations of gallium in the sputtering solutions ([Ga3+] = y.[In3+], y vary from 5 to 25 at.% by a step of 10 at.%). CIGS thin films were investigated by X-ray diffraction, Raman spectroscopy, UV–Vis spectroscopy and four point probing technique. The structural analyses confirm that all CIGS thin films have a chalcopyrite structures. Optical studies reveal that the optical band gap energy of the films increases by increasing the proportion of gallium and is in the range of 1.50–1.56 eV. The electrical properties present an increase in sheet resistivity with the proportion of gallium in the solution.

Published
2020
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23. Synthesis and characterization of organic-inorganic lead halide perovskite (CH3NH3PbI3) thin films for photovoltaic applications

Author

H. Benali, F. Lmai, Abdelkrim Batan, Youssef Nouri, Philippe Thevenin, and Bouchaib Hartiti

Subjects
010302 applied physics, Spin coating, Fabrication, Materials science, business.industry, Photovoltaic system, Halide, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Absorbance, Chemical engineering, Photovoltaics, 0103 physical sciences, Thin film, 0210 nano-technology, business, Perovskite (structure)
Abstract

Solar cells based on hybrid perovskite have marked the world of photovoltaics as a promising photo-absorber material for solar cells, and using inexpensive deposition methods. C H 3 N H 3 P b I 3 have gained significant notice in photovoltaic application as a result of their low fabrication cost and high efficiency that stepped from 3.8% in 2009 to up to 22% in 2018. In the present paper, thin films perovskites were synthesized using low cost method which is the spin coating deposition technique. To obtain the structural characteristic of C H 3 N H 3 P b I 3 , X-ray diffraction was employed. The UV–Visible spectroscopy shows the variation of the absorbance in C H 3 N H 3 P b I 3 between wavelengths 300–800 nm.

Published
2020
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