Abstract
In this study, rare-earth-doped self-activated LiCa3ZnV3O12 (LCZV) vanadate phosphors were preparation by a high-temperature solid-state reaction. Their crystal structure, non-contact temperature sensing, and luminescence properties were studied deeply. Excited by ultraviolet light at 340 nm, the emission of [VO4]3− group and the Eu3+ ions were monitored. The highest strength emission peaks at 470 nm and 610 nm for [VO4]3− and Eu3+, respectively, provide favorable signal identification for estimating temperature. Due to thermal quenching behavior and energy transfer, the FIR (Fluorescence Intensity Ratio) from Eu3+ to [VO4]3− exhibits excellent sensitivity performance at 303 K − 523 K. In the meantime, the maximum absolute and relative sensitivities of the obtained phosphors are 0.0068 K−1 and 1.18 % K−1, which are overtopped to those reported previously. Furthermore, for the luminescent color of the CIE diagram with a strong temperature effect, the color coordinate could be verified from (0.2871, 0.3416) to (0.4121, 0.3420), which was matched well with the linear equation. Consequently, the Eu3+ doped LCZV phosphor not only can be used for high-temperature environmental safety signals but also is an extraordinary viable material in the field of optical sensing.
Published Version
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