Luminescent properties of new red emitting fluoborate based phosphors, Na3Ba2-xB6O12F:xEu3+
Publication date: February 2019
Source: Optik, Volume 179
Author(s): Jian Liu, Wenwu Zhao, Jinqiang Liu, Haitao Gao, Bin Hao
A series of Na3Ba2-xB6O12F:xEu3+ (x = 0.03, 0.05, 0.08, 0.10, 0.13, 0.16, 0.17, 0.19, 0.20 and 0.22) phosphors were prepared by the high temperature solid state reaction method. The single crystal-phase Na3Ba2B6O12F of the Na3Ba2-xB6O12F:xEu3+ sample was confirmed by X-ray powder diffraction measurement. The optical properties are evaluated by photoluminescence excitation and emission spectra, CIE chromaticity coordinate and decay curve. Na3Ba2-xB6O12F:xEu3+ phosphors present the red emitting color under the excitation of near-UV light around 395 nm. Investigation of Eu3+ content dependent emission spectra indicates that x = 0.19 is the optimum doping content of Eu3+ ions in the Na3Ba2B6O12F host. Moreover, the critical distance and the concentration quenching mechanism were also investigated. The absolute luminescence quantum efficiency and the decay time of Na3Ba1.81B6O12F: 0.19Eu3+ sample were reported.