Interionic cross relaxation and tunable color luminescence in KY3F10:Tb3+ nano/microcrystals synthesized by hydrothermal approach

Synthesis and photoluminescent properties of cuboid-like Y2(C2O4)3:Tb3+ green-emitting phosphors

“…The color coordinates are one of the important factors for evaluating phosphors' performance [30,31]. So the chromatic properties of the typical sample Y 0.6 (C 2 O 4 ) 3 :1.4Tb 3+ was measured, and shown in Fig.…”

Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route

“…In literature, the Tb 3+ blue emission is reported for concentration less than 0.01 at% [10,25], but in the present case, the intense blue emission begins to take place at Tb 3+ concentrations relatively high (~1%). Also, host matrix with phonon energy lower than 1000 cm −1 favors the 5 D 3 blue emission due to the absence of multi phonon relaxation [26].…”

“…The phonon energy in the barium orthosilicate is 900 cm −1 [26], then the multiphonon relaxation process that can compete with the 5 D 3 radiative emission is unlikely to take place, since the multiphonon mechanism is limited by the coupling of a maximum of 4 or 5 phonons [26]. (1)…”

Color-tunable phosphor of Sr3YNa(PO4)3F:Tb3+via interionic cross-relaxation energy transfer

“…Several researches have demonstrated that fluoride have a low phonon frequency (∼450 cm −1 ), which can realize the transmission from 5 D 3 to 5 D 4 of Tb 3+ ions as long as the phonon frequency is low enough (∼1000 cm −1 ). 14 …”

“…Apatite type alkaline-earth halophosphates belongs to the hexagonal symmetrical system (space group of P 6 3 / m ) with a general formula of M 5 (PO 4 ) 3 X (M = Na + , K + , Ca 2+ , Mg 2+ , Ba 2+ , Sr 2+ , Mn 2+ , Gd 3+ , Lu 3+ , Y 3+ , X = F, Cl, OH and O). So far, a variety of phosphates with the formula M 3 NaRE(PO 4 ) 3 F have been reported in the literature, such as Sr 3 NaGd(PO 4 ) 3 F, Ba 3 NaLa(PO 4 ) 3 F, and Sr 3 NaLa(PO 4 ) 3 F. 14–16 To the best of our knowledge, there are no reports about the detailed CR property among the Tb 3+ ions in Sr 3 YNa(PO 4 ) 3 F host.…”