Synthesis and luminescent properties of (Sr_0.75Ba_0.25)MoO₄:Pr³⁺, R⁺(Li⁺, Na⁺, K⁺) deep red phosphors

Enhancement of Fluorescence from BaMoO4:Pr3+ Deep-Red-Emitting Phosphor via Codoping Li+ and Na+ Ions

“…Acting as coactivators and/or charge compensators, alkali metal ions like Li + , Na + , and K + were usually introduced into different phosphor host lattices, because they can improve the luminescence efficiency of phosphors due to their chemical nature of low oxidation states and distinct ionic radii 11,13,14,28–30 . Herein, Li + , Na + , and K + ions were doped into BaMoO 4 :Pr 3+ phosphor with the aim of improving its luminescence.…”

“…The excess amount of Li + or Na + ions occupying Ba 2+ sites in the lattices generate extra negative charges ( R Ba )′, which are supposed to generate oxygen vacancies ( V O ) •• for charge neutrality. The presence of the oxygen vacancies generated by the incorporation of Li + or Na + ion can promote the energy transfer from excited carriers in host lattice to Pr 3+ activator 14,22,34,35 …”

“…Doping BaMoO 4 host with suitable rare‐earth ion as activator leads to an excellent luminescent composition. The preparation and luminescence properties of BaMoO 4 doped with rare‐earth ions such as Eu 3+ , Sm 3+ , Tb 3+ , and Pr 3+ have been recently reported 8–14 . Among them, Pr 3+ ‐activated BaMoO 4 deep‐red‐emitting phosphor has received much more attention, because it can be excited by blue light and provides remarkable deep‐red emission, resulting in potential application in pc‐white‐LEDs based on the InGaN chip.…”