Synthesis and spectral property of Pr3+-doped tungstate deep red phosphors

Spectroscopic properties of Pr3+:Gd3Ga5O12 crystal

“…Recently the spectroscopic properties of Pr 3+ ion have been investigated extensively in various hosts including single crystals [1][2][3], nanocrystals [4], powders [5][6][7][8], glasses [9], etc. When the Pr 3+ ions are pumped to the closely grouped 3 P J (J = 0, 1, 2) multiplets, several emissions in red ( 3 P 0 → 3 F 2 ), deep red ( 3 P 0 → 3 F 4 ), orange ( 3 P 0 → 3 H 6 ), green ( 3 P 1 → 3 H 5 ), and blue ( 3 P 0 → 3 H 4 ) spectral regions have been demonstrated in tungstate [6], vanadate phosphors [8], molybdate [3], fluoride crystals [1,10], etc. Also, two dominant transitions from the fluorescent 3 P 0 level of Pr 3+ to the lower 3 H 6 and 3 H 4 states can be mixed to give out white light for application to white LEDs [11].…”

Sol–gel synthesis and photoluminescence studies on colour tuneable Dy3+/Tm3+ co-doped NaGd(WO4)2 phosphor for white light emission

“…On the other hand, NGW crystals also have the advantages of the stable chemical properties, wide absorption in ultraviolet (UV) region and high damage threshold. Few reports have been published with these type of materials such as NaY 1 À x Eu x (WO 4 ) 2 , Eu 3 þ -doped NaGd (WO 4 ) 2 , Tb 3 þ -doped NaGd(WO 4 ) 2 , Dy 3 þ :NaY(WO 4 ) 2 , Eu 3 þ doped KGd(WO 4 ) 2 and Pr 3 þ doped CsGd(WO 4 ) 2 [23][24][25][26]. These reports show that most of the double tungstate based phosphors were prepared by conventional solid state reaction methods.…”

Enhanced luminous efficiency in Pr3+ activated Ca0.5La(MoO4)2 red phosphor with blue excitation for WLED applications

“…The Pr 3? ions exhibit several emissive colors which have been demonstrated in different hosts such as molybdates [15], tungstates [21], oxides [22,23], vanadates [24], fluorides [9], etc. Pr 3?…”