Thermoluminescence Kinetic Parameters and Radioluminescence of RE3+ (RE = Pr, Sm, Tb, Ho, Er)-Doped Barium Tantalate Phosphors

Structural and tunable optical properties of LiMgPO4:Tb3+ phosphor fabricated by sol–gel method

“…Consequently, by augmenting the Tb 3+ concentration in the CIE diagram, the Tb 3+ emission can be tuned from the blue region to the green region. The color purity of a phosphor can be assessed using by the following equation 42–45 : $$$$\begin{equation}{\mathrm{Color}}\,{\mathrm{purity}} = \frac{{\sqrt {{{\left( {x - {x_1}} \right)}^2} + {{\left( {y - {y_i}} \right)}^2}} }}{{\sqrt {{{\left( {{x_d} - {x_1}} \right)}^2} + {{\left( {{y_d} - {y_i}} \right)}^2}} }} \times 100\end{equation}$$$$where the CIE coordinates of phosphor, for diagram, dominant wavelength, and standard white illumination are denoted as ( x , y ), ( x d , y d ), and ( x i , y i ), respectively. For LiMgPO 4 :Tb 3+ , the CIE coordinates at the dominant wavelength were estimated as x d = .026 and y d = .399.…”

“…Consequently, the color purities of LiMgPO 4 :Tb 3+ range from 43.13% to 62.71%. An increase in white light purity value is associated with a decrease in color purity value 43–45 . The color purities of the phosphors are given in Table 2.…”

Exploring the effect of boron on the grain morphology change and spectral properties of Eu3+ activated barium tantalate phosphor

“…1550 °C). [29][30][31] TTB crystal structure belongs to a wide family of functional materials and offers a large scale of doping possibilities due to its suitable structure for different cationic dopants. TTB oxide structures having the A 2 BC 2 M 5 O 15 formula (M = Ta, Nb) consist of three types of sites in which the pentagonal (A), square (B), and triangular (C) tunnels are represented by 15, 12, and 9 CN, respectively.…”

“…TTB oxide structures having the A 2 BC 2 M 5 O 15 formula (M = Ta, Nb) consist of three types of sites in which the pentagonal (A), square (B), and triangular (C) tunnels are represented by 15, 12, and 9 CN, respectively. 29,30 In this paper, we reported the effect of grain size and grain shape on spectral properties with a systematic study, which has been scarcely researched before in the literature. In our previous two studies, 18,19 effect of boron dopant has been examined up to 20 and 25 mol% concentrations, respectively.…”

“…TTB oxide structures having the A 2 BC 2 M 5 O 15 formula (M = Ta, Nb) consist of three types of sites in which the pentagonal (A), square (B), and triangular (C) tunnels are represented by 15, 12, and 9 CN, respectively. 29,30…”