Abstract
A kind of color-tunable BaSnxSi3O7+2×: 0.02 Eu phosphors activated by both Eu2+ and Eu3+ ions have been successfully synthesized by a self-reduction method under air. To investigate the effect of the addition of SnO2 or SnCl2 on luminescent properties, crystal structure, photoluminescence spectra (PL), electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and Commission International chromaticity coordinate (CIE) of the prepared samples were systematically analyzed. The results indicate that the dopant amount of SnO2/SnCl2 in BaSnxSi3O7+2× effectively affects the crystal phase, making the ratio of Eu2+ to Eu3+ change, adjusting the photoluminescence intensity of both Eu2+ and Eu3+. It is noteworthy that the white light emission has been successfully obtained as the x is equal to 0.6 under excited by UV light at 395 nm. These results finally clarify that diverse luminescent colors could be modulated and obtained by controlling the content of SnO2 or SnCl2.
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