Spectroscopic properties of Dy<SUP>3+</SUP>-doped oxyfluoride glasses for white light emitting diodes

NIR to visible upconversion in Er3+-doped fluoride glass under 1550 and 980nm excitations

“…The intensity parameters Ω t (t¼ 2, 4, 6) of the Judd-Ofelt theory are calculated using the absorption data according to the procedure described elsewhere [23][24][25][26]. The Ω 2 (3.01 Â 10 -20 cm 2 ), Ω 4 (1.03 Â 10 -20 cm 2 ) and Ω 6 (1.64 Â 10 -20 cm 2 ) of Er 3 þ of our prepared glass are comparable to those reported for fluoride system.…”

Tailoring the luminescence of Eu3+ co-doped Dy3+ incorporated aluminofluoro-borophosphate glasses for white light applications

“…Following the procedure reported in the literature [14] tristimulus values are calculated which gives power for each of the three primary colors to match with the color of P(λ). The CIE 1931 color chromaticity coordinates x x¼ X X þ Y þ Z and y y¼ Y X þ Y þ Z were obtained from the tristimulus values [43]. The (x, y) coordinates of the title glasses are marked on the CIE 1931 chromaticity diagram and is shown in the inset of emission spectra Figs.…”

Concentration dependent spectroscopic properties of Sm3+ doped borophosphate glasses

“…The spectral color can be obtained by adding three artificial colors called tristimulus values (X, Y and Z). The chromaticity coordinates (x, y, z) were calculated by taking the ratios of the X, Y, Z of the emission light to the sum of the three tristimulus values [7,38] . In general, color chromaticity coordinates (x,y,z) are calculated using the below given expressions…”