J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (6): 949-954.DOI: 10.1016/j.jmst.2017.06.021
Special Issue: Nanomaterials 2018
• Orginal Article • Previous Articles Next Articles
Shang Zhouab, Hua Wangab, Li Zhongab, Junqian Zhaoab, Liang Lic**(), Guanghai Liab*()
Received:
2017-04-19
Revised:
2017-04-28
Accepted:
2017-04-30
Online:
2018-06-10
Published:
2018-06-05
Contact:
Li Liang,Li Guanghai
Shang Zhou, Hua Wang, Li Zhong, Junqian Zhao, Liang Li, Guanghai Li. Synthesis and photoluminescence of Ca1-xTiO3:xEu3+ nanoparticles[J]. J. Mater. Sci. Technol., 2018, 34(6): 949-954.
Fig. 2. XRD patterns of Ca0.93TiO3:0.07Eu3+ sintered at temperatures of 300 (1), 400 (2), 500 (3), 600 (4) and 700 °C (5) together with the standard XRD pattern form orthorhombic CaTiO3.
Fig. 4. XRD patterns (a) and the strongest (121) diffraction peak (b) of Ca1-xTiO3:xEu3+ nanoparticles sintered at 500 °C with Eu doping content of1% (1), 3% (2), 5% (3), 7% (4), 9% (5) and11% (6).
Fig. 5. (a) PLE (monitored at 615 nm) and PL (excited at 395 nm) spectra of Ca0.93TiO3:0.07Eu3+ nanoparticles sintered at 500 °C with Eu doping content of 1% (1), 3% (2), 5% (3), 7% (4), 9% (5) and11% (6). (b) Dependence of PL peak intensity at 615 nm and the ratio of PL peak intensity of the transitions (5D0 → 7F2)/(5D0 → 7F1) on Eu doping content.
Fig. 6. PLE and PL spectra of Ca0.93TiO3:0.07Eu3+ nanoparticles sintered at temperature of (1) 300, (2) 400, (3) 500, (4) 600, (5) 700 °C. The inset is the corresponding dependence of PL peak intensity at 615 nm on sintering temperature.
Fig. 8. XPS survey spectrum of Ca0.93TiO3:0.07Eu3+ nanoparticles (a) and high-resolution spectra of Eu 3d (b) and O 1 s and the corresponding Gaussian fitting (c) of Ca1-xTiO3:xEu3+ nanoparticles with Eu doping content of 1% (1), 5% (2) and 9% (3).
Eu doping content%) | OL (eV) | Od (eV) | OC (eV) | [OL]/[Od] | [OL]/([Od] + [OC]) |
---|---|---|---|---|---|
1 | 529. 4 | 531. 2 | 532. 6 | 5. 52 | 2. 81 |
5 | 529. 5 | 531. 3 | 532. 4 | 4. 23 | 2. 42 |
9 | 529. 8 | 531. 5 | 532. 5 | 2. 83 | 2. 26 |
Table 1 Gaussian fitting binding energy of O 1 s and the intensity ratio of the fitting peaks.
Eu doping content%) | OL (eV) | Od (eV) | OC (eV) | [OL]/[Od] | [OL]/([Od] + [OC]) |
---|---|---|---|---|---|
1 | 529. 4 | 531. 2 | 532. 6 | 5. 52 | 2. 81 |
5 | 529. 5 | 531. 3 | 532. 4 | 4. 23 | 2. 42 |
9 | 529. 8 | 531. 5 | 532. 5 | 2. 83 | 2. 26 |
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