A novel orange emissive phosphor LaPO4:Bi, Sm with sharp and splitting emission peaks of Sm3+

Preparation of LaPO 4 :Ce 3+ ,Tb 3+ nanophosphors by mixed co-precipitation process and their photoluminescence properties

“…Lanthanum orthophosphate (LaPO 4 ), which belongs to two crystalline structures: the monoclinic monozite type (for Ln=La to Gd) and the quadratic xenotime type (for Ln=Tb to Lu), has been showing to be an attractive host lattice for lanthanide ions to prepare phosphors that emit in a broad range of colors [8,9]. LaPO 4 phosphors doped with different types of rare-earth ions, such as Eu 3 þ , Ce 3 þ , Tb 3 þ , Er 3 þ , Dy 3 þ , Sm 3 þ , Yb 3 þ and Pr 3 þ , have been reported in the literatures [9][10][11][12][13][14][15][16]. Among all these orthophosphate-type phosphors, trivalent cerium (Ce 3 þ ) and terbium (Tb 3 þ ) co-activated LaPO 4 (LaPO 4 :Ce 3 þ ,Tb 3 þ ) phosphors are prominent because of the high-efficiency energy transfer between Ce 3 þ and Tb 3 þ , and the property stability at high temperatures.…”

Optical and photoluminescence properties of trivalent rare earth ions doped LiMgPO4

“…According to previously published literature, the modified Scherrer equation or Monshi Scherrer model can be used to estimate the average crystallite size [33]. The significance of the formula lies in its ability to minimize errors mathematically and determine the average crystallite size through all peaks using least-squares with an intercept for appropriate crystallite size determination and the exponential value of the intercept is obtained using equation (5). The crystallite size value in table 3 was determined by utilizing the intercept of a linear regression line that passes through all peaks.…”

“…Numerous host materials including oxides, phosphates, aluminates, silicates, molybdates and vanadates have been used to study the synthesis of white light. The prospective uses of rare earth-doped orthophosphates in thermoluminescence (TL), photoluminescence (PL) and optically stimulated luminescence (OSL) are attracting attention [5,6]. Inorganic phosphors doped with RE have attracted a lot of attention and have been thoroughly investigated recently.…”

Fabrication and enhanced photoluminescence properties of $$\hbox {NaLa}(\hbox {MoO}_{4})_{2}$$ NaLa ( MoO 4 ) 2 : $$\hbox {Sm}^{3+}$$ Sm 3 + , $$\hbox {Bi}^{3+}$$ Bi 3 + phosphors with high efficiency white-light-emitting

“…According to the previous reports, the Bi 3+ singly doped sample usually exhibits a broad band of purple-blue emission, which extends from 350 to 500 nm when excited by 335 nm. As the self-absorption of Bi 3+ from ground state 1 S 0 to excited state 3 P 1 is overlapped with CTS absorption of host MoO 2− 4 ; the introduction of Bi 3+ gives rise to absorption of 310-350 nm [35,48,49]. On one hand, according to Kimani et al [34], it can be explained that due to the metal-metal charge transfer in which the electrons are transferred from the ns 2 orbital of Bi 3+ to the nd 0 orbital of Mo 6+ , the 6s 2 −6s6p excitations of Bi 3+ can effectively extend the absorption band closer to the UV light region, resulting in the increase of PL intensity.…”