Post annealing induced manipulation of phase and upconversion luminescence of Cr³⁺ doped NaYF₄:Yb,Er crystals.

ABSTRACT: The role of post synthesis annealing at different temperatures (200-600 °C) on the structural as well as luminescence properties of NaY_80%F₄:Yb_17%,Er_3% prepared via a coprecipitation method was found to change the structure from a cubic to hexagonal phase with a concomitant increase in upconversion luminescence by 12 times for the green region and 17 times for the red region. Addition of the Cr³⁺ ions (5-20 mol%) into the host followed by post annealing at 200-600 °C causes that the samples to exhibit phase dependent and upconversion luminescence behavior that depend upon the doping concentration as well as the annealing temperature. The inductively coupled optical emission spectroscopy reveals that only 1/600 times of the desir

SUBMITTER: Nannuri SH 

PROVIDER: S-EPMC9062064 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature