Luminescence properties of Sm3+-doped alkaline earth ortho-stannates

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

“…In recent years commercialization of white light-emitting diodes (WLEDs), flat-panel displays, plasma display panels (PDPs), field emission displays (FEDs), and thin-film electroluminescent devices (TFELs) could be possible due to the development of new phosphor materials with improved optical properties [29,[148][149][150]. For the development of new phosphor materials, the efforts to discover new host materials and high-performance activators are needed [29]. Traditionally sulfide and halide phosphors were extensively studied but in recent years oxide phosphors have received attention of the researchers due to their stability [29,150,151].…”

“…For the development of new phosphor materials, the efforts to discover new host materials and high-performance activators are needed [29]. Traditionally sulfide and halide phosphors were extensively studied but in recent years oxide phosphors have received attention of the researchers due to their stability [29,150,151]. In A BO layered perovskite family, M SnO (M = Ca, Sr, Ba), Sr CeO , etc.…”

“…In A BO layered perovskite family, M SnO (M = Ca, Sr, Ba), Sr CeO , etc. have been extensively studied as host matrix for phosphor applications because of their stable crystal structure, non-toxicity, and lack of radioactive elements [29]. The incorporation of optically active lanthanide ions into these host matrices results in phosphors with photoluminescence (PL) and long-lasting phosphorescence (LLP) properties [151][152][153].…”

“…However, LLP phosphors having emission in orange to red region are still out of reach for the use in optical devices. Therefore, there is need for the development of novel host materials for LLP phosphors emitting light in the orange to red wavelength range [29,153]. The properties of LLP phosphor have been modified by using a host-mixing method to change the original constituents of the lattice or introducing different co-dopant [29].…”

“…The A-site cations have a coordination number of "9", locating at the boundary between the two types of layers, while the B-site cations are positioned at the center of an octahedron formed by six oxygen anions. RP oxides have shown very attractive and versatile physical properties such as superconductivity [2][3][4][5][6], magnetoresistance [7][8][9][10][11], mixed ionic and electronic conductivity [12][13][14][15], giant and colossal dielectric [16][17][18][19], low loss microwave dielectric [20][21][22][23][24], photoluminescence [25][26][27][28][29], catalytic activity [30][31][32], thermoelectric [33][34][35], etc., which are useful for many energy and electronic devices. The A BO layered perovskites have recently attracted attention owing to their great environmental stability and versatile applications.…”