Effect of redox reactions on the thermoluminescence characteristics of Cu-doped NaLi₂PO₄ phosphors

Abstract

Change in colour after annealing at different temperatures: (a and d): NaLi2PO4:Cu(ii) and NaLi2PO4:Cu(i) in air, (b and e) NaLi2PO4:Cu(ii) and NaLi2PO4:Cu(i) in 10% H2, (c and f) NaLi2PO4:Cu(ii) and NaLi2PO4:Cu(i) in CO/CO2, respectively.

Mechanoluminescence, thermoluminescence, optically stimulated luminescence and photoluminescence in SrAl2O4:Eu micro- and nanophosphors: effect of particle size and annealing in different atmospheres

“…It is known that even if we dope a phosphor material initially using an impurity salt consisting of the ions in a particular ionic state, it is not necessary that they would be incorporated inside the matrix in the same form, and they may get incorporated in different ionic states (if exists naturally). 101–103 For example, in the present study for doping Eu 3+ ions in a phosphor material, we used Eu(NO 3 ) 3 salt consisting of Eu 3+ ions, and it could be seen in the PL spectra ( Fig. 10 ), they have entered in both forms, Eu 3+ as well as Eu 2+ .…”