Two new rare-earth orthoborates Ba2CdLn2(BO3)4 (Ln = Tb, Eu) and multicolor tunable emission in the Ba2CdTb2-2xEu2x(BO3)4 (0 ≤ x ≤ 0.2) phosphors

Synthesis of the Red-Emitting (Ba, Ca)2ScAlO5:Eu3+ Phosphors with Photoluminescence Properties

“…The carbon 1s line fixed at 284.6 eV is used as the reference to calibrate the peak position of other elements. In Figure c, the XPS signals of Ba 3d can be deconvoluted as double peaks of 3d 3/2 (795.2 eV) and 3d 5/2 (779.9 eV) to confirm the existence of Ba 2+ in the phosphors Figure d shows that the peak position at 350.8 and 346.8 eV of Ca 2p 1/2 and Ca 2p 3/2 can be assigned as oxidized states of Ca 2+ .…”

Two new rare-earth borates Sr2Tb3B27−δO46 and Ba2Eu3B27−δO46 (δ = 2/3): syntheses, crystal structures, and luminescence properties

“…1(d)], with Tb–O distances falling in the range of 2.305(5)–2.343(6) Å, which is close to those reported in other known terbium borates. 37,38 Nine distinct boron atoms are divided into two sets: B1–B4 in tetrahedral coordination and the rest of the B atoms in a triangular configuration. Three BO 3 (centered on B5, B6, and B9) and all BO 4 groups are almost regular, with average O–B–O angles equal to or slightly deviated from 120° or 109.5°, respectively, while the other two BO 3 groups are distorted, with average O–B–O angles of 116.8° and 117.4°, respectively (Table S3†).…”

“…Depending on the considered sites, the mean values of B–O distances cover the range between 1.340 and 1.364 Å in the triangles and from 1.468 to 1.472 in the tetrahedra, which are in accordance with the literature values. 5,37,38…”

“…1(d)], with Tb-O distances falling in the range of 2.305(5)-2.343(6) Å, which is close to those reported in other known terbium borates. 37,38 Nine distinct boron atoms are divided into two sets: B1-B4 in tetrahedral coordination S3 †). Depending on the considered sites, the mean values of B-O distances cover the range between 1.340 and 1.364 Å in the triangles and from 1.468 to 1.472 in the tetrahedra, which are in accordance with the literature values.…”

“…Depending on the considered sites, the mean values of B-O distances cover the range between 1.340 and 1.364 Å in the triangles and from 1.468 to 1.472 in the tetrahedra, which are in accordance with the literature values. 5,37,38 Although Ba 2 Eu 3 B 27−δ O 46 and Sr 2 Tb 3 B 27−δ O 46 are isostructural, the coordination geometries around alkali-earth metal cations display some differences. For example, both nine-and ten-fold coordination geometries are found for Ba 2+ in the Eucontaining compound, while only SrO 9 polyhedra are present in the Tb phase (Tables S2 and S4 †).…”