Abstracts Book - IMRC 2018

• SA2-P011
OPTICAL AND STRUCTURAL PROPERTIES OF AlXGa1-XN NANO-
POWDERS OBTAINED BY PYROLYSIS AND ANNEALED IN NH3
Godofredo García 1 , Ana Maria Herrera 1 , Rafael García Gutiérrez 2 , Erick Gastellou 1 , Fabiola
Nieto 3 , Gustavo Alonso Hirata 4 , Tomás Díaz 1 , Enrique Rosendo 1 , Crisoforo Morales Ruiz 1 ,
Roman Romano Trujillo 1 , Antonio Coyopol Solis 1 , Reina Galeazzi Isasmendi 1
1 Benemerita Universidad Autonoma de Puebla, CIDS-ICUAP, Mexico. 2 Universidad de Sonora,
Departamento de Investigación en Física, Mexico. 3 Benemerita Universidad Autonoma de
Puebla, FCQ, Mexico. 4 Universidad Nacional Autónoma de México, Centro de Nanociencias y
Nanotecnologia, Mexico.
Aluminum-Gallium-Nitride (AlxGa1-xN) powders were synthesized via pyrolysis,
using an organometallic compound obtained by a chemical reaction in this work.
With the goal to enhancement the crystalline quality of the powders it were
annealed at 1000°C in Ammonia (NH3) atmosphere by 2 hr. Allowing the
incorporation of nitrogen in the AlxGa1-xN powders and reducing impurities of
oxygen, which affects its optical properties. The structural, morphological and
optical properties were investigated. X-ray Diffraction analysis confirms the
change in the lattice constant and the particle size of the AlxGa1-xN powders
above 24 nm. It was observed and confirmed by Scanning Electron Microscopy,
that the surface morphology changes with the increase of Al composition. An
elemental analysis was performed by Energy Dispersive X-ray Spectroscopy,
showing the existence of Al, Ga, N and O. The analysis of the
cathodoluminescence spectrum confirms that the emission energy occurs of the
near band edge, with energies that vary from 3.14 eV to 5.66 eV, depending of
the Aluminum concentration.
Keywords: Aluminum-Gallium-Nitride, nanopowder, pyrolysis
Presenting authors email: godgarcia@yahoo.com