Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Abstract

Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

Development of silica‐coated rare‐earth doped strontium aluminate toward superhydrophobic, anti‐corrosive and long‐persistent photoluminescent epoxy coating

“…[ 11 ] Owing to its greater brightness emission and longer‐persistent emission, the aluminate phosphor doped with lanthanides (SrAl 2 O 4 :Eu 2+ ,Dy 3+ ) has been shown to be an excellent long‐lived emissive inorganic phosphor. [ 12–17 ] Phosphorescent pigments typically consist of an energy trap and a crystal of mixed elements. The crystals can be stimulated and charged under an irradiation source.…”

Synthesis, luminescence and persistent luminescence of europium-doped strontium aluminates

“…Persistent phosphorescence is a phenomenon in which a material re-emits light over long periods (hours) after stopping the excitation irradiation [1][2][3][4][5][6][7][8]. The term "persistent phosphorescence" is not unique in the scientific literature to describe this phenomenon, other expressions are "long lasting phosphorescence (LLP)", "long afterglow" or simply phosphorescence.…”

Calcium Tungstate Doped with Rare Earth Ions Synthesized at Low Temperatures for Photoactive Composite and Anti-Counterfeiting Applications

“…Rare earth ion-doped luminescent materials are attracting a lot of attention because of their various applications as materials in lighting, leisure luminescent materials, and luminescent diodes [1][2][3]. In particular, the crystalline material tungstic acid is a suitable host material for doping rare earth ions because of its excellent thermal stability, and high energy transfer efficiency from tungsten ions to activator ions [4,5].…”