In this research work Nickel catalyst assisted CVD method was
used at 1200 °C for obtaining the grass-like nanostructured morphology
of GaN. GaN powder used as precursor was pre-treated with
aqueous NH3 at 100 °C thrice. This facile and feasible method has a
significant effect on the concentration and morphology of the product
which showed excellent field emissions and PL properties. Results of
FE reported in this paper are better than many reported results of GaN
and other materials.