Author Affiliations
1School of Science, Nanjing University of Science and Technology, Nanjing 210094, China2School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai’an 223001, Chinashow less
Fig. 1. XRD patterns of (a) SLPO:xEu3+ (x = 0–0.17), (b) SLPO:xTb3+ (x = 0–0.17), and (c) SLPO:xCe3+ (x = 0–0.17).
Fig. 2. (Color online) PLE (λem= 611 nm) and emission (PL, λex= 394 nm) spectra of SLPO:0.05Eu3+ phosphor.
Fig. 3. (Color online) (a) Emission spectra of SLPO:xEu3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xEu3+) versus log(I/xEu3+); inset: PL intensity of SLPO:xEu3+ as a function of Eu3+ concentration.
Fig. 4. (Color online) PLE (λem= 539 nm) and emission (PL, λex= 379 nm) spectra of SLPO:0.07Tb3+ phosphor.
Fig. 5. (Color online) (a) Emission spectra of SLPO:xTb3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xTb3+) versus log(I/xTb3+), inset: PL intensity of SLPO:xTb3+ as a function of Tb3+ concentration.
Fig. 6. (Color online) (a) PLE (λem= 482 nm) and PL (λex= 337 nm) spectra of SLPO:0.12Ce3+ phosphor; (b) the PL (λex= 337 nm) spectra of SLPO:xCe3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature. Inset (up left): Cell volumes of SLPO: xCe3+ (0.01 ≤ x ≤ 0.17) as function of Ce3+ concentration. Inset (up right): the relationship between the emission peak with the intensity and the Ce3+ concentration in SLPO:xCe3+.
Fig. 7. (Color online) Normalized (a) PL and (b) PLE spectra of SLPO: 0.01Ce3+ excited and monitored at different wavelengths.
Fig. 8. (Color online) PL spectra of (a) SLPO:0.05Eu3+ (λex= 394 nm) and (b) SLPO:0.07Tb3+ (λex= 379 nm) at different temperatures, inset: the temperature dependence of the integrated emission intensity; (c) the PL spectra of SLPO:0.12Ce3+ at different temperatures (λex= 337 nm); (d) the activation plot for thermal quenching of SLPO:0.12Ce3+, inset: temperature dependence of the integrated emission intensity.
Fig. 9. SEM images of (a) SLPO:0.05 Eu3+; (b) SLPO:0.07Tb3+ and (c) SLPO:0.12Ce3+ phosphors.
Fig. 10. CIE chromaticity diagram for SLPO:0.05Eu3+ (Point 1), SLPO:0.07Tb3+ (Point 2) and SLPO:0.12Ce3+ excited under different wavelengths (Points 3–7); insets: the corresponding digital photographs of (a) SLPO:0.05Eu3+ and (b) SLPO:0.07Tb3+ under 254 nm ultraviolet lamp irradiation; and (c) SLPO:0.12Ce3+ under 365 nm ultraviolet lamp irradiation.
Sample | | | CIE (x,y) |
---|
| 394 | 611 | (0.6405, 0.3591) | | 379 | 539 | (0.3381, 0.4445) | | 312 | 469 | (0.2316, 0.2769) | | 337 | 482 | (0.2328, 0.3014) | | 352 | 498 | (0.259, 0.3663) | | 362 | 505 | (0.2733, 0.3951) | | 372 | 540 | (0.2925, 0.4004) |
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Table 1. CIE Coordinates, Peak Emission Wavelength of PL Spectra for Eu3+, Tb3+, and Ce3+-Doped SLPO Samples