The effect of ion radius on luminescence for alkali ions doping in Y2O3: Yb3+/Ho3+ thin film

Luminescence performance and energy transfer mechanism investigation of RE3+ (Eu3+/Tb3+/Ce3+)-doped Y2O3 phosphors

“…It is well known that Eu 3+ will be distributed on both C2 and S6 lattice sites, the magnetic dipole transitions of 5 D 0 → 7 F 1 will occur when Eu 3+ occupies the inversion symmetry center S6, and the magnetic dipole transitions of 5 D 0 → 7 F 2 will occur when Eu 3+ occupies no inversion symmetry center C2. 22 In the Y 2 O 3 lattice structure, more Y 3+ is distributed on the C2 lattice, the doped Eu 3+ will likewise be distributed more on the C2 lattice, so the intensity of the 5 D 0 → 7 F 2 transitions of Eu 3+ ions is relatively high, and intense red emission at 612 nm occurs. It is possible to observed that the emission intensity of the sample also reaches its optimum at x = 0.1 and then decreases.…”

Realizing efficient photoluminescence spectral modulation via Sb3+/Ln3+ co-doping in Cs2NaInCl6 double perovskites

“…Since Sb 3+ (0.92 Å) and Ln 3+ ions (Tb 3+ = 0.923 Å and Ho 3+ = 0.894 Å) have similar ionic radii and the same valence as In 3+ ions (0.81 Å), they are more fovarble for substituting In 3+ ions in the lattice, resulting in the formation of [SbCl 6 ] 3À and [LnCl 6 ] 3À octahedrons. [36][37][38] The effect of Sb 3+ and Ln 3+ doping on the crystal structure of Cs 2 NaInCl 6 was investigated using powder X-ray diffraction (XRD). As shown in Fig.…”