A Blue-Emitting Phosphor of Tm3+ Ion-Doped BaY2ZnO5

作者：Shih Hung Rung; Chang Yee Shin^*

来源：Journal of Electronic Materials, 2017, 46(11): 6603-6608.

DOI：10.1007/s11664-017-5717-0

• Phosphors
• doped
• luminescence
• thulium ions
• optical properties

A phosphor of Tm3+ ion-doped BaY2ZnO5 which exhibits an emission in the blue region is synthesized via a vibrating milled solid-state reaction with metal oxides. The x-ray powder diffractometry patterns show that all the diffraction peaks are attributed to the orthorhombic BaY2ZnO5 structure for the Tm3+ ion concentration doping from 1 mol.% to 7 mol.%. Upon excitation at a wavelength of 362 nm, the emission intensity of the D-1(2) -> F-3(4) transition is at a maximum when the Tm3+ concentration is 2 mol.% and decreases as the Tm3+ concentration increases, and there is concentration quenching when x > 0.02. A single exponential decay is observed for diluted samples, and a non-exponential decay occurs when BaY2ZnO5 is doped with a greater concentration of the Tm3+ ion. The Tm3+ ion-doped BaY2ZnO5 phosphor exhibits a vivid blue emission with a wavelength of 458 nm which has the Commission Internationale de I'Edairage (CIE) color coordinates of x = 0.148 and y = 0.035, and color purity is more than 96%, which is superior to the reported purity for commercial blue phosphors, such as Y2O3:Tm and ZnS:Ag.

• 出版日期2017-11