Luminescence spectroscopy of YVO4:Ln3+, Bi3+ (Ln3+=Eu3+, Sm3+, Dy3+) phosphors

Luminescence Spectroscopy and Origin of Luminescence Centers in Bi-Doped Materials

“…However, the origin of these states was not discussed. In [3,26,29,36,39,40,42,43,[143][144][145], the Bi 3+ -related spectral bands of YVO 4 :Bi were ascribed to the electronic transitions between the ground and excited states of a Bi 3+ ion, while in [7,27,33,34,38,41,44,128,141,156,[249][250][251][252][253], to the charge transfer transitions between Bi and V ions. In the latter set of works, the lowest-energy absorption band was connected with the Bi 3+ (6s 2 ) → V 5+ (3d 0 ) transitions and the emission band, with the V 4+ (3d 1 ) → Bi 4+ (6s 1 ) transitions.…”

Unravelling the energy transfer mechanism in bismuth co-activation of LaInO3:Sm3+/Ho3+ nanophosphor for color-tunable luminescence

“…27,28 L. I. van Steensel et al showed that LaInO 3 :Bi 3+ is an efficient, blue-emitting photo luminescent material 29 and researchers have reported that on co-doping with Bi 3+ , it acts as an excellent sensitizer to enhance the luminescence of RE ions in a wide variety of hosts. [30][31][32][33][34][35][36][37][38] The emission spectrum of Bi 3+ contains a broad band, whose peak maximum varies from blue to green for different host lattices 39 because the outer 6s 2 electronic congurations of Bi 3+ depend strongly on their environmental conditions, such as covalence, coordination number and site symmetry. [40][41][42] Among the RE ions, Sm 3+ and Ho 3+ are important activators for producing signicant orange-red and green emissions for wide applications in optical displays, remote sensing and medical purposes.…”

White luminescence and energy transfer process in Bi3+,Sm3+ co-doped Ca3Al2O6 phosphors

“…Bi 3+ co-doping has been developed as a valuable approach to enhance the luminescence of RE ions [9][10][11][12][13][14][15][16][17][18][19][20][21]. There are about three type of enhancement effect of Bi 3+ on RE ions luminescence.…”

“…It was reported that the substitution of Bi 3+ for Y 3+ caused an increase of the refractive index of the matrix and enhanced Tb 3+ luminescence in YPO 4 :-Bi 3+ ,Tb 3+ [9]. The second one is the formation of Bi 3+ -V 5+ metalmetal charge transfer and the subsequent ET from Bi 3+ -V 5+ charge transfer band to RE ions, such as in YVO 4 :Bi 3+ ,Eu 3+ [12][13][14] and Ca 9 Y(VO 4 ) 7 :Bi 3+ ,Eu 3+ [15] phosphors. The feature of these two types is that there is no characteristic broad emission from Bi 3+ ions.…”