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A series of Ca 2 YTaO 6 : Tm 3+  blue-emitting phosphors were firstly prepared by the solid-state method. The phase formations and purity of Ca 2 YTaO 6 :  x Tm 3+  ( x  = 0.3%-5% mol) were verified by X-ray powder diffraction. The morphological characteristics of Ca 2 YTaO 6 : 0.005Tm 3+  were detected by scanning electron microscopy (SEM). Photoluminescence properties were discussed by emission ( λ  em  = 460 nm) and excitation ( λ  ex  = 359 nm) spectra. The critical doping concentration of the products was 0.005 mol. The proposed concentration quenching mechanism in Ca 2 YTaO 6  materials was the electric multipole interaction. Besides, the color coordinates (0.1408, 0.0891) of Ca 2 YTaO 6 : 0.005Tm 3+  were located in blue region. The results suggested the Ca 2 YTaO 6 : Tm 3+  phosphors can be promising blue-emitting components for the WLED applications.

Synthesis, characterization and photoluminescence properties of Tm3+-doped Ca2YTaO6 blue-emitting phosphors

Synthesis, characterization and photoluminescence properties of Tm³⁺-doped Ca₂YTaO₆ blue-emitting phosphors