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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