Luminescence properties of Tb³⁺ doped Sr₂SnO₄ green phosphor in UV/VUV regions

Abstract

Polycrystalline Sr2SnO4 phosphors doped with Tb(3+) were prepared by conventional solid-state reaction method. Materials were characterized by powder XRD and EDS techniques. The luminescence properties of these materials were investigated under UV and VUV excitation. Upon excitation at 272 nm, phosphors exhibited intense emissions at 492 and 543 nm due to (5)D4 → (7)F6 and (5)D4 → (7)F5 transitions of Tb(3+) ions, respectively. Materials also exhibited strong emissions from these transitions under VUV excitation at 147, 173 and 230 nm. Quantitative analysis of the spectra indicated probable applications of these phosphors for PDP and other display devices as green emitting phosphors.

UV-A and UV-B excitation region broadened novel green color-emitting CaGd2ZnO5:Tb3+ nanophosphors

“…Generally available green color-emitting phosphor, particularly Tb 3+ ions doped phosphor, has the excitation wavelengths in the UV-C and UV-B regions or in the vacuum UV region. [13][14][15] Thus, the development of a good green color-emitting phosphor having excitation wavelengths within the UV-A and UV-B regions is a key technology for achieving a tricolor WLED system. In this context, we developed a Tb 3+ ions activated green color-emitting novel CaGd 2 ZnO 5 (CGZO) nanophosphors with the enhanced broadened excitation region over the UV and near-UV (NUV) ranges.…”

Ruddlesden-Popper phase A2BO4 oxides: Recent studies on structure, electrical, dielectric, and optical properties

“…The alkaline earth element (AE) doped and undoped RE MO layered perovskites (where RE is rare earth element and M is transition metal) have been considered as alternatives for cathode application in Solid Oxide Fell Cells (SOFC)/Solid Oxide Electrolysis Cells (SOEC), due to their superior mixed ionic and electronic conductivities in comparison to traditionally used perovskite oxides [36][37][38][39]. Sr CeO , AE SnO (AE = Ca, Sr, Ba) are found to be suitable host for photoluminescence applications [ [40][41][42]. Doped and undoped lanthanide nickelates show giant/colossal dielectric properties [43][44][45].…”

Development of long‐persistent photoluminescent epoxy resin immobilized with europium (II)‐doped strontium aluminate

“…Phosphorescent materials are characterized using their photoluminescence characteristics as a result of their excitation from an external light source and their capacity to store such light energy. There are various well known long‐persistence inorganic phosphors that have recently been developed as primary emitters such as Y 2 O 2 S:Mg 2+ /Ti 4+ or CaS:Eu 2+ /Tm 3+ /Ce 3+ with a red colour emission, Sr 2 SnO 4 :Tb 3+ or SrAl 2 O 4 :Eu 2+ /Dy 3+ with a green colour emission, and CaAl 2 O 4 :Eu 2+ /Nd 3+ or SrMgSi 2 O 6 :Eu 2+ /Dy 3+ with a blue colour emission . Those long‐persistence inorganic phosphors are characterized by excellent chemical, photostability, and thermal stability, nontoxicity, high brightness, long time phosphorescence (>10 h), the ability to be recycled, reversibility, nonradioactivity, and quantum efficiency .…”