Synthesis, characterization and photoluminescence of aluminium nitride nanopowders through an AlCl3 aided CVD route
Single-phase AlN nanopowders, with average diameter of about 70 nm, were synthesized through an AlCl3 aided CVD route; the formation process is also discussed in this paper. XRD and HRTEM revealed that the AlN nanopowders obtained are wurtzite structured with lattice constants of a = 3.1114 Å and c = 4.9792 Å. The photoluminescence spectrum showed that there is a deep-level blue luminescence band centred at 2.54 eV in AlN nanocrystals. This method is a simple and efficient way to synthesize AlN nanopowders.