Achieving non-contact optical thermometer via inherently Eu2+/Eu3+-activated SrAl2Si2O8 phosphors prepared in air

摘要: Abstract Eu2+/Eu3+-activated SrAl2Si2O8 phosphors, which presented blue emission originating from 4f65d → 4f7 transition of Eu2+ ions and red arising 5D0 7FJ Eu3+ ions, were synthesized by the traditional solid-state reaction in air. The photoluminescence intensities increased with increasing dopant content reached their maximum value when doping concentration was 3 mol%. Moreover, based on diverse thermal quenching behaviors thermometric performance SrAl2Si2O8: Eu2+/Eu3+ phosphors investigated fluorescence intensity ratio technology. absolute sensitivity relative sensitivities 0.056 K-1 0.30% K−1, respectively, at temperature 583 K. Also, effects different excitation wavelength studied detail. On other hand, through analyzing various responses decay time to temperature, performances also discussed range 298–573 K. up 0.22% K−1 573 K. These results suggested that had potential field non-contact optical thermometry.