New full color emitting phosphor through energy transfer in Bi3+ and Eu3+ co-doped La3TaO7 weberite system

Investigation of the luminescence properties and energy transfer mechanisms in Gd3TaO7:Bi3+,Eu3+ phosphors for their potential application in full-spectrum WLEDs

“…The emission band is attributed to the 3 P 1 → 1 S 0 transition of two kinds of Bi 3+ . 38,39 However, the identification of excitation bands appears to be more complex. The excitation band of Bi 3+ (I) with a peak at 376 nm can be attributed to the 1 S 0 → 3 P 1 transition.…”

“…It has been demonstrated that La 3 TaO 7 and Y 3 TaO 7 serve as host materials with suitable sites for Bi 3+ doping, both exhibiting broad bluegreen emission bands upon UV excitation. 38,39 To the best of our knowledge, no previous reports have been made on the Gd 3 TaO 7 :Bi 3+ ,Eu 3+ system. The existence of two distinct Gd 3+ sites in Gd 3 TaO 7 provides suitable doping positions for both Bi 3+ and Eu 3+ , making it possible for the Gd 3 TaO 7 :Bi 3+ ,Eu 3+ system to achieve single-phase white light emission.…”

Solution Combustion Synthesis and Energy Transfer in LaMgAl11O19:Tb3+/Sm3+ Tunable Phosphor

“…Consequently, possible ET process among RE combinations in various materials have been reported earlier, especially Ce 3+ →Tb 3+ , Tb 3+ →Sm 3+ , Tb 3+ →Eu 3+ , Sm 3+ →Eu 3+ , Dy 3+ →Sm 3+ etc. [2][3][4][5][6][7][8][9][10][11]. ET mechanism in potassium-fluoro-phosphate glasses has been investigated for Tb 3+ -Sm 3+ pair [12].…”