Mg²⁺‐Doped GaN Nanoparticles as Blue‐Light Emitters: A Method to Avoid Sintering at High Temperatures

Abstract Bright blue‐light emission at 410 nm is observed from Mg²⁺‐doped GaN nanoparticles prepared by the nitridation of Ga₂MgO₄ nanoparticles at 950°C. The sintering of these nanoparticles during high‐temperature nitridation was prevented by mixing the Ga₂MgO₄ precursor nanoparticles with La₂O₃ as an inert matrix before the nitridation process. The Mg²⁺‐doped GaN nanoparticles were isolated from the matrix by etching with 10 % nitric acid. The Mg²⁺‐doped GaN nanoparticles were characterized by photoluminescence, atomic force microscopy, X‐ray diffraction, and IR analyses.