Abstract:
A series of novel blue emitting
K$_{1+x}$Ba$_{1-2x}$Tm$_x$BP$_2$O$_8$ ($0.01\leq x \leq0.08$) phosphors
were synthesized by a solid-state reaction at high-temperature for the
first time. The phase
purity and photoluminescence properties were investigated by $X$-ray diffraction
(XRD)
and fluorescence spectroscopy (FS) measurements, respectively. The influence of the
doping concentration of Tm$^{3+}$ on its relative emission intensity was investigated, and
the critical distance was calculated. The as-prepared phosphor can be effectively
excited with a $356$ nm light, and exhibit blue emission at $457$ nm with high color
purity. The above work indicates this phosphor could be a potential candidate as blue
emitting phosphor for application in white light-emitting diodes.
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