Nitridated Ca2NaMg2V3O12: Eu3+ Vanadate Garnet Phosphor-in-Glass

Abstract

<jats:p>In this study, Ca2NaMg2V3O12 coordination compound undoped and doped with Eu3+ obtained in the air and ammonia atmosphere by solid-state reaction was investigated. Ca2NaMg2V3O12: Eu3+ obtained in the ammonia atmosphere was then investigated as a phosphor-in-glass (PiG). Annealed Ca2NaMg2V3O12: Eu3+ phosphor forms a single phase with the cubic garnet structure and Ia3d space group. Nitridation in ammonia causes a widening of a VO43− group emission band on the low energy side and it red-shifts by 20 nm. The emission of Eu3+ is extended as compared to the non-nitridated phosphor. Ca2NaMg2V3O12: Eu3+ after nitridation shows higher emission quantum yield (QY): 49 vs. 45 and lower correlated color temperature (CCT) and 4179 vs. 4998 as compared to phosphor without nitridation. The QY for PiG is 55. The thermal stability of nitridated phosphors is superior to phosphor obtained in the air atmosphere and is further enhanced for PiG.</jats:p>

Multi‐color luminescence of Sm3+‐doped Na2YMg2V3O12 phosphor potentially applicable in white‐LEDs

“…It is well known that the application of phosphors with broad emission peaks or multiple emission peaks in the visible area to white-LEDs is considerably feasible for achieving white light with CRI and appropriate correlated color temperature (CCT) [19][20][21][22]. Vanadate, which is made up of a (VO 4 ) 3À tetrahedron, is a luminescent material essentially doped with non-rare earth ions.…”

The synergism between self-activated and impurity-related emissions of LiCa3ZnV3O12: lattice distortion, energy transfer and temperature sensing effect

“…The garnet structure belongs to the cubic crystal system, described by the general formula A 3 B 2 C 3 O 12 with a space group Ia 3d (230). 12,13 So far, several garnet structured vanadates, such as LiCa 3 ZnV 3 O 12 , 14 NaCa 2 Mg 2 V 3 O 12 , 15,16 Ca 2 KZn 2 (VO 4 ) 3 , 17 and KCa 2 Mg 2 V 3 O 12 , 18 have been reported for the self-activating luminescent emissions. To expand the luminescent property of the garnet-structured vanadate phosphors, various rare earth ions have been introduced into these hosts, resulting in several new luminescent systems, such as NaCa 2 Mg 2 V 3 O 12 :Sm 3+ , 19 Ca 2 AgZn 2 V 3 O 12 :Nb 5+ , 20 CaZnV 2 O 7 :-Eu 3+ , 21 and Ca 2 KZn 2 V 3 O 12 :Dy 3+ .…”