Eu3+ doped Sr2CeO4 phosphors for thermometry: single-color or two-color fluorescence based temperature characterization

Abstract

Sr₂CeO₄:Eu³⁺ phosphors containing various activator contents have been systemically investigated by temperature-dependent fluorescent method. The temperature-dependent photoluminescence spectra and the integrated emission intensity of Sr₂CeO₄:Eu³⁺ at different temperatures indicate that these samples can exhibit distinct low-temperature sensing characteristics. The sensitive intensity/temperature responses of these materials, depending on tuning of the concentration of Eu³⁺, provide a sound foundation for their potential application in single-color or two-color fluorescence thermometry techniques.