Abstract
A series of color-tunable emitting LiSrVO4:Eu3+ phosphors were synthesized by solid state reaction. The Luminescence properties and temperature sensing performance were investigated. Under near ultraviolet (NUV) excitation, LiSrVO4: Eu3+ exhibited both the green broad band luminescence due to (VO4)3−groups and red sharp emission peaks of sensitized Eu3+ ions. The tunable color of high-brightness emission from green to red is realized by controlling the Eu3+ doping content. The optical thermometry of LiSrVO4: Eu3+ was studied via excitation intensity ratio between V-O charge transfer band and Eu3+ f-f transition at low temperature (10–323 K). The highest absolute sensitivity SA is found to be 8.6%. The red emission intensity of Eu3+ shows a linear relationship in high temperature range of 298–573 K. The maximum value of relative sensitivity SR is established as 2.2%K−1 @573 K. The LiSrVO4:Eu3+ phosphors might be a promising candidate for NUV based phosphor and temperature sensing in a wide temperature range.
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