The luminescence spectroscopy and thermal stability of red-emitting phosphor Ca9Eu(VO4)7

Structure and Luminescence of New Red‐Emitting Materials‐Eu3+‐Doped Triple Orthovanadates NaALa(VO4)2 (A = Ca,Sr,Ba)

“…In Eu 3+ ‐doped orthovanadate such as YVO 4 , it has been proposed that the contribution of Eu 3+ –O 2− charge transfer could be neglected, and the excitation band (200–350 nm) was ascribed to a charge transfer from the oxygen ligands (O 2− ) to the central vanadium atom (V 5+ ) within the VO 4 3− group. Similar assignment was also reported in the other RE‐doped vanadates, for example, Ca 9 Dy(VO 4 ) 7 , YVO 4 : A ( A = Eu 3+ , Dy 3+ , Sm 3+ , Er 3+ ), YVO 4 :Dy 3+ , Ca 9 Eu(VO 4 ) 7 , and Ca 2 NaMg 2 V 3 O 12 :Eu 3+ …”

Phase formations and tunable red phosphors of LiYb1−Eu (MoO4)2 (x = 0.01–1)

“…If the Eu 3+ ions were arranged in the ordered site, the excitation can diffuse quickly and give an emission from Eu 3+ ions. It has been found that some Eu 3+ compounds show no concentration quenching at all [39], such as NaEu(MoO 4 ) 2 [40], Ca 9 Eu(VO 4 ) 7 [41] and etc.…”

Vanadate Phosphors for Energy Efficient Lighting

“…The high chemical and thermal property of vanadate makes its preparation diffi cult. The preparations of phosphors mainly focus on the high-temperature solid-state reactions providing agglomerated powders, which can change the structural characteristics of the powders [30,14,15,[36][37][38]. Recently, the development of new methods for the synthesis of micro or nano phosphors may increase the probability for high effective rare-earth phosphors [39][40][41][42][43][44][45][46][47][48].…”