Hexagonal Nanocrystal Growth of Mg or Zn from Incorporation in GaN Powders Obtained through Pyrolysis of a Viscous Complex Compound and Its Nitridation

Hexagonal nanocrystals were obtained from Zn-doped GaN powders and Mg-doped GaN powders, which were synthesized via pyrolysis of a viscous complex compound, followed by its nitridation. XRD showed well-defined peaks for hexagonal GaN with an average crystal size of 21.3 nm. Scanning electron microsc...

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Bibliographic Details
Published in:Crystals (Basel) 2023-10, Vol.13 (10), p.1421
Main Authors: Gastellóu, Erick, García, Rafael, Herrera, Ana M., Ramos, Antonio, García, Godofredo, Hirata, Gustavo A., Luna, José A., Carrillo, Roberto C., Rodríguez, Jorge A., Robles, Mario, Ramírez, Yani D.
Format: Article
Language:English
Subjects:
Ammonia
Chemical vapor deposition
Combustion
Complex compounds
crystal lattice
Emission spectra
Gallium
GaN
Liquors
Magnesium
Morphology
Nanocrystals
Nitrates
Nitrides
Organic chemicals
Photoluminescence
powder
Powders
Pyrolysis
Raman spectra
Scanning electron microscopy
Spectrum analysis
Temperature
Transmission electron microscopy
Vibration mode
viscous complex compound
Zinc
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Summary:Hexagonal nanocrystals were obtained from Zn-doped GaN powders and Mg-doped GaN powders, which were synthesized via pyrolysis of a viscous complex compound, followed by its nitridation. XRD showed well-defined peaks for hexagonal GaN with an average crystal size of 21.3 nm. Scanning electron microscopy showed an amorphous and porous appearance in surface morphology, which could be related to the combustion process. Energy-dispersive spectroscopy characterization showed contributions of gallium, nitrogen, and small traces of Zn and Mg in the GaN samples. TEM showed the presence of well-defined hexagonal nanocrystals with an area of 75.9 nm2 for the Zn-doped GaN powders and an area of 67.7 nm2 for the Mg-doped GaN powders. The photoluminescence spectra showed an emission energy of 2.8 eV (431.5 nm) for the Zn-doped GaN powders, while the Mg-doped GaN powders showed energies in the range from 2.7 eV to 2.8 eV (460.3 nm–443.9 nm). The Raman scattering showed spectra where the vibration modes A1(TO), E1(TO), and E2(High) could be observed, which are characteristic of hexagonal GaN.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst13101421