New promising phosphors Ba3InB9O18 activated by Eu3+/Tb3+

Characteristics, Thermodynamics, and Preparation of Nanocaged 12CaO·7Al2O3 and Its Derivatives

“…Moreover, based on literatures and works relating to fluorescent/phosphor materials from authors’ institute together with co‐authors, we have recently successfully prepared C12A7 powders and Ho 3+ ‐doped derivative C12A7–Ho 3+ with pure green up‐conversation emission . Activation energy of crystallization for polycrystal C12A7 powders was calculated to be 813 or 791 kJ/mol (for the former, only considering crystallization) and 1084 or 1077 kJ/mol (for the latter, taking both crystallization and nucleation into consideration) according to both Ozawa/Kissinger and modified Ozawa/Kissinger methods, respectively.…”

Fluorescent properties of a green- to red-emitting Eu3+, Tb3+ codoped amorphous calcium silicate phosphor

“…There are few reported examples of Tb 3 þ doped phosphors with peak excitation wavelengths in the vicinity of 379 nm [15,16]. The emission peak of the phosphor was 542 nm, which is attributed to the typical 5 D 4 -7 F 5 transition of the Tb 3 þ ion [17]. The excitation and emission peaks of the Eu 3 þ doped amorphous calcium silicate phosphor were observed at 395 nm and 613 nm, respectively ( Fig.…”

Photoluminescent properties of Tb3+ doped GdSrAl3O7 nanophosphor using solution combustions synthesis

“…The broad excitation band (200 -250) with maxima at 239 nm is ascribed to spin allowed transitions (f-d) from the 7 F 6 ground state of Tb 3+ ions (4f 8 ) to the excited states of the 4f 7 5d 1 electronic configuration. [33] Two narrow bands centered at 272 nm and 313 nm represents the transitions of Gd 3+ ions from ground state 8 S to excited states 6 I and 6 P, respectively in the Gd 1.90 Tb 0.10 SrAl 3 O 7 nanophosphor. The existence of the absorption due to Gd 3+ ions indicates energy transfer from Gd 3+ to Tb 3+ ions, showing Gd 3+ acts as sensitizer ions in the host lattice.…”