Synthesis and study of structural, optical, and electrical properties of nontoxic and earth-abundant Na2ZnSnS4 material

In this work, we report the structural, electrical, and optical properties of nontoxic and earth-abundant Na 2 ZnSnS 4 (NZTS) material. NZTS powder has been successfully synthesized using an easy and nontoxic pathway: the solid-state reaction technique. X-ray diffraction, transmission electron micro...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2020-11, Vol.31 (21), p.18858-18869
Main Authors: Bousselmi, G., Khemiri, Naoufel, Benali, A., Graca, M. P. F., Santos, R. F., Costa, B. F. O., Kanzari, M.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystallization
Diffraction patterns
Electrical impedance
Electrical properties
Electrical resistivity
Energy gap
Lattice parameters
Materials Science
Morphology
Optical and Electronic Materials
Optical properties
Pattern analysis
Photomicrographs
Photovoltaic cells
Preferred orientation
Raman spectroscopy
Solar cells
Spectrum analysis
Temperature dependence
X-ray diffraction
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Summary:In this work, we report the structural, electrical, and optical properties of nontoxic and earth-abundant Na 2 ZnSnS 4 (NZTS) material. NZTS powder has been successfully synthesized using an easy and nontoxic pathway: the solid-state reaction technique. X-ray diffraction, transmission electron microscopy, and Raman spectroscopy were used to study the structural properties of the NZTS. The synthesized powder crystallized in the stannite tetragonal structure with lattice parameters a  = 6.48 Å and c  = 9.12 Å. XRD and Raman characterizations showed the occurrence of the secondary phase Na 4 SnS 4 . Optical bandgap measurements were obtained from UV–Visible analysis and showed a high optical bandgap value of 3.32 eV and confirmed the presence of Na 4 SnS 4 . TEM micrographs provide a description of the morphology of NZTS. The HRTEM images reflect a preferred orientation along the {112} plane, which is consistent with the X-ray diffraction pattern. EDS analysis confirmed the presence of the four constituent elements of the NZTS within their corresponding composition. NZTS powder indicates a conductivity type n . A study of electrical conductivity was carried out by using the impedance spectroscopy. The frequency and temperature dependence of the complex electrical impedance and AC and DC conductivity were explored. These interesting results make the NZTS particularly attractive for solar cell applications and especially suitable as a window layer.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-020-04424-1