Photoluminescence properties of Eu3+:ZrF4–BaF2–LaF3–YF3–AlF3–NaF glasses

Frequency-conversion properties of Eu3+ doped chlorophosphate glass ceramics containing CaCl2 nanocrystals

“…3. Similar excitation spectra for Eu 3 + doped glasses and glass ceramics were reported in previous works [9,13,14,21,[24][25][26]. The strongest peak at 395 nm for Eu 3 + :Glass and particularly strong peaks for Eu 3 + doped glass ceramics samples at 300 nm in Fig.…”

“…The 5 D 0 -7 F 1 transition is magnetic dipole in nature and is allowed by all selection rules, whereas the 5 D 0 -7 F 2 transition is electric dipole in nature and other emission transitions, 5 D 0 -7 F J (J¼0, 3 and 4), are strictly forbidden [15,21,24,25] and appear with low intensities. The excitation beam at 395 nm has been suggested to be an ideal one to demonstrate europium glass as a brightly red luminescent optical material [9,13,14,25]. In excitation spectra (Figs.…”

Photoluminescence of Eu3+, Tb3+ and Tm3+-doped transparent SiO2–Al2O3–LiF–GdF3 glass ceramics

“…The absence of emissions starting from the excited levels of 5 D J(=1-3) is due to the high energy phonons found in the glasses; i.e., when the Eu 3+ ions are excited to any level above the 5 D 0 , there is a fast non-radiative multiphonon relaxation to this level. Thus the emissions from 5 D J(=1-3) to the 7 F J are several orders smaller than that of 5 D 0 → 7 F J [19]. The emission process of the Eu 3+ ions, particularly under the excitation of the 394 nm could be considered based on the luminescent dynamics.…”

Emission analysis of RE3+ (Eu3+, Tb3+ & Ho3+): B2O3-BaO-LiF/AIF3 glasses

“…Therefore, 5 D 0 → 7 F J emission transition intensities could be considered to represent the total emission intensity of the Eu 3+ glass studied as was reported earlier in literature [19]. arises from the Laporte-forbidden transitions [22]. Here, green emission at 547nm ( 5 D 4 → 7 F 6 ) obeys the magnetic dipole transition selection rule of…”