The invention discloses a high-purity green luminescent and high-optical
temperature measurement sensitivity material and a preparation method thereof, and belongs to the technical field of optical luminescent materials. The chemical general formula of the high-purity green
luminescence and high-optical
temperature measurement sensitivity material is NaBi < 0.89-x > Yb < 0.1 > Er < 0.01 > Ca < x > (MoO4) 2, x is equal to 0.01-0.10, the material is a tetragonal
system, the
space group is I41 / a,
rare earth erbium ions (Er < 3 + >) are used as active ions,
rare earth ytterbium ions (Yb < 3 + >) are used as sensitizing ions, and green up-conversion emission near 530 nm and 550 nm can be generated under near-
infrared excitation; the Er < 3 + > upconversion
green emission ratio and the
green light purity are improved by introducing non-equivalent ions Ca < 2 + > to regulate and control a matrix lattice environment and a
charge compensation state, and meanwhile, the optical
temperature measurement sensitivity based on the
thermal coupling energy level is remarkably enhanced, so that the Er < 3 + > upconversion
green emission compound has potential and wide application value in the fields of high-purity
green light emission and optical temperature measurement.