Abstract
RbZnPO4:xSm3+ (0.005≤x≤0.05) red phosphors were prepared for the first time. The phase purity, luminescence property and thermal stability were systematically determined by employing X-ray diffractometer, excitation and emission spectra and temperature dependent emission spectra. The site occupation of Sm3+ in RbZnPO4 was discussed based on the X-ray diffractometer analysis. The electronic structure property of RbZnPO4 host was studied, which revealed that RbZnPO4 possessed a direct band gap with band gap value of 3.815eV. The photoluminescence emission spectra showed that RbZnPO4:xSm3+ (0.005≤x≤0.05) could absorb near-ultraviolet light around 404nm and emit red emissions with dominated peaks at 601 and 647nm, ascribed to the 4G5/2 to 6H7/2 and 6H9/2 transitions of Sm3+ ions, respectively. The optimal doping concentration and the critical distance as well as the interaction mechanism of Sm3+ in RbZnPO4 were discussed. The interesting temperature sensitive thermal quenching behavior and the related mechanism were studied.
Published Version
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