Journal
MATERIALS
Volume 15, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ma15041436
Keywords
CuIn1-xZnxSe2; nanoparticles; chalcopyrite; solvothermal
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Funding
- Algerian government of the National Exceptional Program (PNE)
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CuIn1-xZnxSe2 powders with various atomic percentages were synthesized, and the effect of Zn-x compound percentages on the structural and optical properties of the powders was investigated. The results showed that the energy gap values of CuIn1-xZnxSe2 increased with the molar fraction of Zn-x.
CuIn1-xZnxSe2 powders with various atomic percentages (x = 0, 0.05, 0.11, 0.16 and 0.21) were synthesized with the solvothermal method using metal chlorides and ethylendiamine as sources of precursors and a solvent, respectively. The experiment aims to investigate the effect of atomic percentages of Zn-x compounds on the structural and optical properties of CuIn1-xZnxSe2 in order to improve future technological applications based on this material. The powders' chalcopyrite phases were identified by X-ray diffraction. Energy dispersive X-ray spectroscopy analysis revealed the presence of Cu, In, Zn and Se with the expected atomic ratio of Zn/(In + Zn). Scanning electron microscopy and transmission electron microscopy analysis showed that the powders have large-scale desert rose-like structures. The nanopowders' optical study by UV-visible spectrophotometry showed that the CuIn1-xZnxSe2 energy gap values increase with the molar fraction of Zn-x. A change from 1.15 to 1.4 eV was observed.
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