White emission from NaO-BaO-Bi2O3-SiO2 Glass system Doped with Dy3+

Na2O-Gd2O3-Al2O3-P2O5 glass scintillator doped with Dy3+: X-rays and proton responses

“…The emission spectra under Gd 3+ excitation (λ Ex = 275 nm) in Fig. 5(b) represent the intensely sharp peak of Gd 3+ at 311 nm ( 6 P 7/2 → 8 S 7/2 ), 1,2,7,8,11,12) which matched to the excitation peak at 312 nm ( ) and 752 ( 4 F 9/2 → 6 H 9/2 ) nm 1,[7][8][9][10][11][12]21) were also observed and they were weak compared to Gd 3+ emission. After the excited Gd 3+ ion lowered its energy level from 6 I 7/2 to 6 P 7/2 by non-radiative relaxation (NR), the energy transfer (ET) then occurred from 6 P 7/2 of Gd 3+ to 4 L 19/2 of Dy 3+ as shown in Fig.…”

“…There are many excitation peaks of Gd 3+ and Dy 3+ in the spectra. The excitation peaks at 246, 253 and 275 nm corresponded to the Gd 3+ transitions, 8 S 7/2 → 6 D 7/2 , 6 D 9/2 and 6 I 7/2 , respectively 1,2,7,8,11,12) those revealed the energy transfer from Gd 3+ 1,[7][8][9][10][11][12]21) The strongest excitation wavelength (λ Ex ) for Gd 3+ and Dy 3+ ion was 275 Table I. List of the band assignments for FTIR spectra.…”

“…Dysprosium ion (Dy 3+ ) is one of the RE 3+ that generates strong blue and yellow emission, and the suitable ratio between both emissions can be white light. 6) There were many studies on the Dy 3+ doped glasses for radiation detection material such as Dy 3+ : 9) Dy 3+ :NaO-BaO-Bi 2 O 3 -SiO 2 , 10) Dy 3+ :CaO-Gd 2 O 3 -P 2 O 5 11) and Dy 3+ :K 2 O-Gd 2 O 3 -B 2 O 3 -P 2 O 5 . 12) In previous work, the Na 2 O-Al 2 O 3 -Gd 2 O 3 -P 2 O 5 glass system was studied and showed attractive behaviors due to its low preparation temperature, high transparency in visible light (VIS) to the near-infrared (NIR) region and low phonon energy enhancing the quantum efficiency of RE3 + .…”

Elucidating the impact of Dy2O3 substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

“…The emission color perception of glass with different Dy 2 O 3 (1, 2, and 3 mol%) was determined by calculating the Commission International de l'Eclairage in 1931 (CIE). Color coordinates (x, y) were determined from the intensities of emission spectral profiles [40,58]. The CIE chromaticity coordinates (x, y) for the assessed glasses are (0.39617, 0.43777), (0.38144, 0.41286), and (0.36132, 0.37882), respectively, as seen in figure 12.…”

Rare earth ion (RE = Tb/Eu/Dy) doped nanocrystalline oxyfluoride glass‐ceramic 5BaF2–95SiO2

“…Among the RE ions, Eu 3+ ions have orange light emission around 596 nm and red emission around 621 nm (the 5 D 0 → 7 F J transitions, J = 0-4). 23 Tb 3+ has green light emission around 548 nm (the 5 D 4 → 7 F 5 transitions), 24 and Dy 3+ ions emit blue and yellow, corresponding to the transitions of 4 F 9/2 → 6 H 15/2 and 6 H 13/2 , 25,26 respectively. Consequently, depending on the variation of the type and quantities of Tb/ Eu/Dy ions in 5BaF 2 -95SiO 2 GCs, they are expected to obtain white light with high luminous intensity.…”