Photoluminescence properties of Eu3+ and Bi3+ co-doped Ca3SnSi2O9 phosphors through energy transfer

Energy transfer and color‐tunable emission in Ba2Y2Si4O13:Bi3+,Eu3+ phosphors

“…As everyone knows, Eu 3+ ions are highly sensitive to crystal field symmetry, which can give rise to different electronic transition predominates and relative intensities . When they locate at a site without inversion symmetry, the electric dipole 5 D 0 → 7 F 2 transition is dominating . On the contrary, when Eu 3+ ions lie in a site with inversion symmetry, the magnetic dipole 5 D 0 → 7 F 1 transition is predominated .…”

The effect of Bi3+ and Li+ co-doping on the luminescence characteristics of Eu3+-doped aluminum oxide films

“…Some of these centers, however, might favor charge transfer processes in such way that a total enhancement of the luminescence is achieved. This is the case of alkali ions such as Li þ , Bi 3 þ and others that have been reported to enhance the charge and/or energy transfer into rare earth luminescent centers in metal oxides [11][12][13]. In the present work, the role of the incorporation of Bi 3 þ and Bi 3 þ plus Li þ ions in Eu 3 þ doped aluminum oxide films deposited by the spray pyrolysis technique has been investigated.…”

Enhanced luminescence intensity of novel red-emitting phosphor -Sr3Lu2(BO3)4:Bi3+,Eu3+ via energy transfer

“…Recently, there has been a rapid increase in the number of researches on white-light emitting diodes (W-LEDs) and it has begun replacing conventional lighting sources due to its advantages such as high brightness, high energy efficiency, low power consumption, longer working performance and low environmental risk [1][2][3][4][5][6]. The common fabrication of W-LEDs involves a blue-emitting InGaN chip and a yellow emitting phosphor Y 3 Al 5 O 12 :Ce 3+ (YAG) [1,2,7].…”

“…Liu et al [1] found that the luminescence intensity and quantum efficiency of ) system which has an orthorhombic structure with Pc21n space group. The lattice parameters of Sr 3 Y 2 (BO 3 ) 4 has lattice parameters of a = 8.701(1) Å, b =15.984(8) Å, c = 7.381(2) Å and α = β = γ = 90° [14,15]. Furthermore, the longer distance among the rare-earth ions in the crystal structure of Sr 3 Y 2 (BO 3 ) 4 results in higher doping concentration of Eu 3+ [14].…”

“…During this migration process, the excitation energy would be diminished at a quenching site, causing a decrease in the luminescence [3]. Thus, the optimum concentration of Bi 3+ in Sr 3 Lu 2 (BO 3 ) 4 :Bi 3+ was determined to be 0.01. It was also notable in the emission bands that the luminescent centers of Bi 3+ at S 6 and C 2 quench simultaneously although they have different Stokes shift and concentration.…”