Li4SrCa(SiO4)2:Eu2+: A Potential Temperature Sensor with Unique Optical Thermometric Properties

Rui Shi; Lixin Ning; Yan Huang; Ye Tao; Lirong Zheng; Zhibing Li; Hongbin Liang

doi:10.1021/acsami.8b22754

Li₄SrCa(SiO₄)₂:Eu²⁺: A Potential Temperature Sensor with Unique Optical Thermometric Properties

ACS Appl Mater Interfaces. 2019 Mar 13;11(10):9691-9695. doi: 10.1021/acsami.8b22754. Epub 2019 Mar 4.

Authors

Rui Shi¹, Lixin Ning², Yan Huang³, Ye Tao³, Lirong Zheng³, Zhibing Li¹, Hongbin Liang¹

Affiliations

¹ MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, School of Chemistry , Sun Yat-sen University , Guangzhou 510275 , China.
² Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Department of Physics , Anhui Normal University , Wuhu , Anhui 241000 , China.
³ Beijing Synchrotron Radiation Facility, Institute of High Energy Physics , Chinese Academy of Sciences , Beijing 100039 , China.

PMID: 30816689
DOI: 10.1021/acsami.8b22754

Abstract

Investigations on luminescence properties of lanthanide-activated phosphors are not only essential to understanding the fundamental structure-property relationship but also important to advancing the development and application of relevant research techniques. We report herein a promising optical thermometric material Eu²⁺-doped Li₄SrCa(SiO₄)₂ utilizing the different sensitivities of Eu_Sr²⁺ and Eu_Ca²⁺ emission intensities to temperature. A unique evolution of Eu²⁺ luminescence in the as-prepared sample is identified under the simultaneous action of UV illumination and thermal treatment. The maximum relative sensitivities are 2.87% K^-1 (at 440 K) and 1.51% K^-1 (at 460 K) for the as-prepared and illuminated samples, respectively. These temperature sensing features reflect a great potential of Eu²⁺-doped Li₄SrCa(SiO₄)₂ for applications in the optical thermometry field.

Keywords: Eu2+; electron transfer; high sensitivity; luminescence evolution; optical thermometry; temperature sensor.