Luminescence properties of ZnGa₂O₄:Cr³⁺,Bi³⁺ nanophosphors for thermometry applications.

ABSTRACT: Chromium(iii) and bismuth(iii) co-doped ZnGa₂O₄ nanoparticles are synthesized by a hydrothermal method assisted by microwave heating. The obtained nanoparticles, with a diameter smaller than 10 nm, present good luminescence emission in the deep red range centered at 695 nm after coating with a silica layer and calcination at 1000 °C during 2 h. Persistent luminescence and photoluminescence properties are investigated at several temperatures. Bandwidth and luminescence intensity ratio of persistent emission do not present enough change with temperature to obtain a competitive nanothermometer with high sensitivity. Nevertheless, persistent luminescence decay curves present a significant shape change since the trap levels involved in the deexcitation mechanism are unfill

SUBMITTER: Glais E 

PROVIDER: S-EPMC9091948 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature