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  • Title: Upconversion of transparent glass ceramics containing β-NaYF4:Yb3+, Er3+ nanocrystals for optical thermometry.
    Author: Li X, Yang L, Zhu Y, Zhong J, Chen D.
    Journal: RSC Adv; 2019 Mar 06; 9(14):7948-7954. PubMed ID: 35521154.
    Abstract:
    β-NaYF4 nanocrystal embedded glass ceramics were fabricated by a melt-quenching method with subsequent heat-treatment. Structural characterizations and spectrographic techniques were performed to verify the successful precipitation of β-NaYF4 nanocrystals and partition of dopants. Upon excitation of 980 nm, bright green upconversion emission could be achieved in Yb3+, Er3+ codoped β-NaYF4 nanocrystal embedded glass ceramics. Furthermore, the temperature-dependent upconversion behaviour based on thermally coupled energy levels was also examined in the range of 300-773 K with the maximum relative sensitivity of 1.24% K-1 at 300 K. Accordingly, it has been proved to be a promising candidate for application in optical thermometry.
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