Synthesis and upconversion emission studies of CaYF₅:Ho³⁺/Yb³⁺ phosphor and its applications in optical thermometry, fingerprint detection, and security ink.

ABSTRACT: In this work, a CaYF₅:Ho³⁺/Yb³⁺ upconversion phosphor was synthesized and its structural, morphological, and optical properties were studied. The upconversion emission study was performed at an excitation pump power density of 5 W cm^-2 and emissions at 544 nm, 650 nm and 747 nm due to the ⁵F₄(⁵S₂) → ⁵I₈, ⁵F₅ → ⁵I₈ and ⁵F₄(⁵S₂) → ⁵I₇ transitions of the Ho³⁺ ion, respectively were observed. From temperature-dependent upconversion spectra temperature sensitivity was calculated and sensitivity is found to be 14 × 10^-3 K^-1 for the synthesized upc

SUBMITTER: Shwetabh K 

PROVIDER: S-EPMC10031573 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature