Upconversion photoluminescence of Ho³⁺-Yb³⁺ doped barium titanate nanocrystallites: Optical tools for structural phase detection and temperature probing.

ABSTRACT: Authors have explored the photo-physical properties of Ho³⁺-Yb³⁺ doped BaTiO₃ nanocrystals and proposed an intuitive method to probe temperature and crystal phase structure of the matrix. Structural phase change of doped crystals was analyzed in terms of their X-ray diffraction, and it was confirmed through second harmonic generation. We give insights on upconversion of energy of light-emission in Ho³⁺-Yb³⁺: BaTiO₃ nanocrystals upon a 980 nm laser-light excitation and subsequently, the excited state dynamics were studied with the help of dependence of upconversion luminescence on excitation power and measuring-temperature. To understand the nature of occupancies of the Ho³⁺ ions at the Ti- and Ba-sites, we perform

SUBMITTER: Mahata MK 

PROVIDER: S-EPMC7260367 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature