Luminescence properties of Eu3+ doped YBO3 for temperature sensing

YBO:2 at.% Euwas prepared by the solid state reaction and its temperature dependent luminescence was investigated for possible applications in temperature sensing. Phase composition of this material was confirmed by X-ray powder diffraction analysis and excitation and emission spectra were also provided. Under excitation of 355 nm, the fluorescence originating from ~5Dand ~5Dstates varied as the temperature rose in a region from 333 to 773 K. The fluorescence intensity ratio(FIR) of ~5Dand ~5Dwas investigated which increased significantly with the rise of temperature. The maximal relative sensitivity in the whole temperature range was 1.8% K(at 333 K). The results recommended YBO:Euas a new material of the FIR method for non-contact optical thermometry.