Optical investigation of nanophosphor prepared by combustion and Pechini methods

Sm3+-doped Sc2O3 polycrystalline ceramics: Spectroscopic investigation

“…At 300 K the stronger emission lines come from the first Stark level of 4 G 5/2 , but also from the second Stark level placed at $175 cm À1 higher. The spectra are similar to those reported for Sm 3+ in Y 2 O 3 phosphors [24]. 10 K emission spectra, given only by first Stark of the 4 G 5/2 , reflect the Stark structure of the IR levels, as illustrated in Fig.…”

“…3 with 4 G 5/ 2 ? 6 H 7/2 emission; one should mention the similar features (as relative intensities) to those of Sm 3+ in Y 2 O 3 at 77 K [24]. Some additional small features were remarked, but for an unambiguous assignment further work is necessary.…”

“…of RE 3+ doped sesquioxides, especially with Nd [13,14], Yb [15,16], Er [17,18], Ho [19,20], Tm [21,22], etc., but up to now no investigations on Sm 3+ in sesquioxide ceramics have been reported. In fact, there are few data on Sm 3+ in sesquioxides, they refer to Y 2 O 3 single crystals [23] and Y 2 O 3 or Lu 2 O 3 nano-phosphors [24,25].…”

Red-emitting Ln2−xEuxTe2O6:RE (Ln=La, Y; RE=Sm3+, Gd3+) phosphors prepared by the Pechini sol–gel method

“…According to previous works, the excitation around 395 nm corresponds to 7 F 0 → 5 L 6 transition, the excitation at 466 nm corresponds to 7 F 0 → 5 D 2 transition and finally the excitation around 534 nm corresponds to 7 F 0 → 5 D 1 transition [23]. The excitation spectrum of the sample containing Sm 3+ shows also a sharp 6 H 5/2 → 4 K 11/2 line at 406 nm [24] (see Fig. 6).…”

Synthesis and characterization of Sm3+-doped Y(OH)3 and Y2O3 nanowires and their NO reduction activity

“…And in fact, nano-horns were only produced with cyclic voltametric (scanning) conditions. Recently, the photoluminescence behavior of Y 2 O 3 :Sm 3+ nanoparticles, prepared by combustion and Pechini methods have been reported [14]. The similarity of ionic radii [15], electronic structures between Y 3+ and Sm 3+ ions [16] provides the necessary conditions for the synthesis of the Y(OH) 3 1D nanoscale material with the assistance of Sm 3+ .…”