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A white emitting phosphor Ba2Ca(BO3)2:Dy3+ was synthesized via a high temperature solid state reaction at 1000℃ for 5 h. The luminescence, mole fraction quenching and thermal stability of Ba2Ca(BO3)2:Dy3+ were investigated. According to the phase composition analyzed by X-ray powder diffraction, there is no crystalline phase except Ba2Ca(BO3)2 in the sample. Ba2Ca(BO3)2:Dy3+ can produce white emission under 348 nm excitation. The emission intensities of Ba2Ca(BO3)2:Dy3+ are affected by Dy3+ concentration. The concentration quenching effect was analyzed, and the concentration quenching mechanism was verified as dipole-dipole interaction. The critical distance(R c) obtained based on the crystal structure data is 2.911 nm. At 150℃, the emission intensity of Ba2Ca(BO3)2:Dy3+ is 68.0% of the initial value at room temperature. The activation energy for the thermal quenching calculated is 0.202 e V. Moreover, the CIE chromaticity coordinates of Ba2Ca(BO3)2:Dy3+ locate in the white region of(0.319, 0.356).
A White emitting phosphor Ba2Ca (BO3) 2: Dy3 + was synthesized via a high temperature solid state reaction at 1000 ° C for 5 h. The luminescence, mole fraction quenching and thermal stability of Ba2Ca (BO3) 2: Dy3 + were investigated. According to the Ba2Ca (BO3) 2: Dy3 + can produce white emission under 348 nm excitation. The emission intensities of Ba2Ca (BO3) 2 The concentration quenching effect was analyzed, and the concentration quenching mechanism was verified as dipole-dipole interaction. The critical distance (R c) obtained based on the crystal structure data is 2.911 nm. At 150 ° C., The emission intensity of Ba2Ca (BO3) 2: Dy3 + is 68.0% of the initial value at room temperature. The activation energy for the thermal quenching calculated is 0.202 e V. Moreover, the CIE chromaticity coordinates of Ba2Ca (BO3) 2: Dy3 + locate in the white region of (0.319, 0.356).