Synthesis and photoluminescence properties of CaSnO3:Pr3+ prepared through the amorphous metal complex method using a water-soluble Sn4+ complex

Relationship between the bandgap energy and photoluminescence properties of Pr3+-activated complex perovskite oxides by cation–nitrogen substitution

“…Polycrystalline Pr 3+ -activated Ca 3 Ta 3Àx Mg x O 6+3x N 3À3x samples with a total Mg 2+ concentration (x) of 0.00 to 1.00 and a Pr 3+ ion concentration immobilized at Ca : Pr = 0.998 : 0.002 were prepared through the amorphous metal complex method. [21][22][23][24] This technique yields oxide precursors with better purity and homogeneity when compared to those prepared through the conventional solid-state reaction method. Various metal ions chelated by hydroxycarboxylic acids, such as citric, malic, and lactic acids, are likely to be uniformly distributed in the amorphous metal complex gel-like matter; hence, the stoichiometric ratio and the homogeneity of the solution are preserved during subsequent processing.…”

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO3 Perovskite through Efficient Photon Utilization and Local Site Engineering

“…Design of efficient optoelectronic devices, light -emitting diodes, scintillators, and so forth, requires a very thorough analysis of materials particularly regarding structure, defects, doping efficiency, dopant local structure, and so forth. − This becomes much more important in structurally flexible oxides such as ABO 3 perovskites. Perovskites are considered one of the most investigated materials for a variety of applications owing to their unique electronic, optical, magnetic, catalytic, and ferroelectric properties. ,, Among perovskites, CaSnO 3 (CSO), a high band gap semiconductor with a band gap of ∼4.7 eV is considered a highly diverse oxide owing to its unique structure, properties, and multifunctional applications. These included optoelectronics, catalysis, sensors, photodetectors, phosphors, lithium-ion batteries, and so forth. ,− Defects such as antisites, Schottky, oxygen vacancies (OVs), and so forth are abundantly present in CSO and are reported to have significant influence on its optical, catalytic, magnetic, and electrical properties. − These defects can also lead to interesting photoluminescence properties in CSO as well, which is an extremely important area of research in these days for designing dopant- and lattice strain-free phosphors .…”