Fabrication and Optical Property of Different Morphologies InxGa1-xN Nano-Crystals

Different morphologies of InxGa1-xN (x=0, 0.25) nanomaterials were prepared upon Si substrates by Atmospheric Pressure Chemical Vapor Deposition (APCVD), metal Ga, In, NH3 gas as the source of InxGa1-xN, respectively. Gold (Au) as catalyst has an important role for the change of morphology. The morphology, chemical composition, crystalline, and PL properties of InxGa1-xN were investigated by XRD, SEM, XPS, and PL, respectively. The results show that all samples are Wurtzite structure, however, the morphology has been changed from flower to pagoda with the effect of Au catalyst; with the increase of In content, the intensity of PL for InxGa1-xN nano-crystals increases and blue light zone appears. In addition, the intensity of PL of InxGa1-xN prepared with the catalysis of Au is the strongest comparing with others samples. Finally, a possible formation process for growing different morphologies InxGa1-xN nano-structures is proposed.