Study of the structural and luminescent properties of Ce3+ and Eu3+ co-doped YAG synthesized by solid state reaction

Sol-gel assisted molten-salt synthesis of novel single phase Y3–2xCa2xTaxAl5−xO12:1%Eu garnet structure phosphors

“…The growing need for light emitting diodes (LEDs) and lasers by the human society demands safe, environmentally friendly synthesis techniques for fabrication of low-cost novel materials with better and improved properties. One of the most suitable ways to solve the need for this demand is to improve the already existing compounds by modifying their chemical composition and, in such a way, tuning their already excellent properties such as quantum yield, emission color, thermal and radiation stability needed for practical applications [1][2][3][4].…”

Photocatalytic Hydrogen and Oxygen Evolution Performed by a Long-Afterglow Material

“…Previous studies demonstrated that when Ce 3+ and Eu 3+ coexist, electron transfer occurs easily between them, resulting in the formation of abnormal valence ions, Ce 4+ and Eu 2+ , attributed to the conjugated electronic structure between Eu 3+ and Ce 3+ . 17 As illustrated in the XPS spectra (Figure 4b,c), Ce 3+ , Ce 4+ , Eu 3+ , and Eu 2+ coexist in Sr 2 MgSi 2 O 7 :Eu,Ce, confirming the equilibrium relationship between different valence rare earth ions in the system. This conjugation could facilitate the photoinduced charge transfer between the rare earth active sites in the catalyst, 18 thereby enhancing the efficiency of the catalytic unit reaction cycle and consequently improving the photocatalytic efficiency.…”

Crystal structural and photoluminescence properties of Eu3+ doped MgZn2(PO4)2 phosphors by R+ (R = Li, Na, K) charge compensation

“…7, where the monitoring emission wavelength is 597 nm, and the excitation wavelength is 396 nm. The luminescence attenuation curve is well-fitted by the second-order exponential function, 24,27,28,38 where C 1 and C 2 are coefficients, and τ 1 and τ 2 are time constants. The average lifetime of MgZn 2 (PO 4 ) 2 can be calculated by the following formula: 38 …”

“…It is well known that trivalent europium (Eu 3+ ) with a 4f 6 electronic configuration leads to an intense red emission due to the 5 D 0 → 7 F 1,2 transitions in a variety of host materials. 17–34 So many studies about the Eu 3+ -doped in tungstate, phosphate, silicate, borate, and oxide have been reported, 16–24 e.g. , BaZn 2 (PO 4 ) 2 :Eu 3+ , Sr 3 Sc(BO 3 ) 3 :Eu 3+ ,Bi 3+ , Ca 2 ZnSi 2 O 7 :Dy 3+ ,Eu 3+ , NaLa(WO 4 ) 2 :Eu 3+ , Sr 3 WO 6 :Eu 3+ , and Ca 2 GdSbO 6 :Eu 3+ phosphors have been synthesized.…”