Improvement of Luminescence Properties of Blue‐to‐Red Emitting NaCaBO3: Ce3+, Mn2+ Phosphor Prepared by Sol–Gel Method

Publisher： John Wiley & Sons Inc

E-ISSN： 1744-7402|12|4|738-744

ISSN： 1546-542x

Source： INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Vol.12, Iss.4, 2015-07, pp. : 738-744

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Abstract

Color‐tunable phosphors NaCaBO3: Ce3+, Mn2+ were synthesized by sol–gel (SG) and solid state (SS) method. SEM observation indicated that the microstructure of phosphor (SG) consisted of regular fine grains with an average size of about 5 μm. NaCaBO3: Ce3+, Mn2+ showed two emission bands: one at 425 nm for Ce3+ and another at 610 nm for Mn2+. NaCaBO3: Ce3+, Mn2+ (SG) exhibit higher energy‐transfer efficiency (90%) and higher Mn2+ quantum efficiency (80%) than SS samples, due to smooth surface, narrow size distribution, and improved homogeneity of sensitizer/activator ions. NaCaBO3: Ce3+, Mn2+ exhibits blue‐to‐red tunable color by changing Ce3+/Mn2+ ratio.

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