Comparative study on the luminescent properties of Y3Al5O12:RE3+ (RE: Eu, Dy) phosphors synthesized by three methods

Synthesis and luminescent properties of Ln3+ (Eu3+, Sm3+, Dy3+)-doped lanthanum aluminum germanate LaAlGe2O7 phosphors

“…The sharp peaks in the range from 280 to 550 nm are associated with typical intra-4f transitions of the Eu 3+ ion. In comparison with the conventional Eu 3+ -doped phosphors [15][16][17], it is noteworthy that the intensity of CTS transition is significantly weaker than that of intra-4f transitions. This phenomenon is uncommon, because the typical Eu 3+ -activated phosphors always show strong CTS transition band absorption around 200-300 nm.…”

Synthesis and evolution of crystalline garnet phases in Y3Al5-xInxO12

“…Additionally, the SEM micrographs presented in Figure 7 show that these volumetric plate-like crystallites are covered with spherical particles or particulate matter which could be attributable to the impurity phases. 12 garnets showed the formation of high-agglomerated plate-like crystals with particle size ranging from 1 μm to 3 μm.…”

“…The Y-Al(In)-O precursor gels were prepared using stoichiometric amounts of analytical-grade Y 2 12 , YAING) (0.0125 mol) dissolved in 50 ml of distilled water were added and the resulting mixture was stirred for 3 h at the same temperature. In a following step, 2 ml of 1,2-ethanediol as complexing agent was added to the solutions.…”

“…Besides, the optical properties of YAG are dependent on the crystal size and crystal size distribution, and on processing conditions. For example, different morphology was determined for the lanthanide-doped YAG samples synthesized by different methods [11][12][13][14][15].…”

Luminescence properties of Dy3+:GdAlO3 nanopowder phosphors

“…The RE ions are characterized by a partially filled 4f shell that is shielded by 5s 2 and 5p 6 electrons. Combinations of RE 2 O 3 and Al 2 O 3 , such as Y 3 Al 5 O 12 (YAG), Gd 3 Al 5 O 12 (GAG), YAlO 3 (YAP) and GdAlO 3 (GAP) are well known as chemically stable and as suitable host for the replacement of RE 3+ (Ce 3+ , Nd 3+ , Er 3+ , Eu 3+ , Tb 3+ , Sm 3+ and Dy 3+ ) activators [5][6][7][8]. Among these, gadolinium aluminum perovskite (GAP) is an important phosphor host material with perovskite structure.…”