NOVELTY - Tungstate rare earth light conversion material, where light conversion material has wavelength range of 250-450 nm in UV light excitation, and can emit high-strength near infrared light within the range of 900-1100nm.    USE - The tungstate rare earth light conversion material is useful for preparing silica-based solar cell batteries (claimed).    ADVANTAGE - By adopting a high-temperature solid state method or a chemical synthesis method, no reducing atmosphere is needed for protection in preparation process, the tungstate rare earth light conversion material is simple in the technique, low in production cost, pollution-free and environment-friendly, the tungstate rare earth light conversion material has strong absorption property in the wavelength range from 250nm to 450nm and can emit high-strength near infrared light within the range of 900-1100nm, and the light energy of the waveband can be absorbed effectively by a silica-based solar battery.    DETAILED DESCRIPTION - Tungstate rare earth light conversion material comprises M5R1-xYbx(WO4)4, where light conversion material has wavelength range of 250-450 nm in UV light excitation, and can emit high-strength near infrared light within the range of 900-1100nm.    R=Er3+, Eu3+, La3+, Y3+, Ce3+, Tm3+, Pr3+, Nd3+, Sm3+, Gd3+, Tb3+, Dy3+, Ho3+ or Lu3+;    M=Na+, Li+ or K+; and    x=mole percentage of doped Yb3+, at 0.0001-1.0.    An INDEPENDENT CLAIM is included for a high-temperature solid state method or a chemical synthesis method of the tungstate rare earth light conversion material involving calcining the resulting mixture, calcination temperature is 200-500 degrees C, the calcination time is 1-10 hours; the resulting mixture is cooled, ground and mixed uniformly, calcined in an air atmosphere, the calcination temperature is 500-850 degrees C, calcined time is 1-10 hours, and cooling to room temperature, to obtain a rare earth tungstate light conversion material; or the solution is slowly mixed at 50-80 degrees C; stirring for 1-2 hours, allowing to stand, drying to obtain a fluffy precursor; the precursor is placed in a muffle furnace at calcination temperature of 550-800 degrees C, for 2-15 hours, and cooling to room temperature, to obtain a rare earth tungstate light conversion material.