A rare earth-free GaZnON phosphor prepared by combustion for white light-emitting diodes

作者：Chouhan Neelu; Lin Chun Che; Hu Shu Fen; Liu Ru Shi^*

来源：Journal of Materials Chemistry C, 2015, 3(7): 1473-1479.

DOI：10.1039/c4tc02615b

Nanophosphor GaZnON was synthesized by combustion using a unimolarmixture ofmetal oxides and urea as a flux/combustible agent at varying temperature and time; the resulting products crystallized in a single monoclinic phase and had broad PLE spectra (300-550 nm at lambda(ex) = 350 nm) with the characteristic blue emission that can be utilised in white light-emitting diodes by adding them with red and green light-emitting phosphors and by using a UV LED (lambda(ex) = 300 nm). Phosphors were examined according to respective package parameters. The blue light-emitting phosphor GaZnON was found to have excellent potential in white light-emitting diode devices by assimilating them with already viable red and green light-emitting phosphors and by stimulating them using a near-UV LED chip with wavelength lambda(ex) = 300 nm. The possible electron transitionmechanism responsible for the luminescence process is also discussed based on the experimental data.

• 出版日期2015