Research Article
Preparation of Compensation Ions Codoped SrTiO3:Pr3+ Red Phosphor with the Sol-Gel Method and Study of Its Luminescence Enhancement Mechanism
Table 1
Calculated Mulliken population analysis for SrTiO3:Pr3+: SrTiO3:Pr3+, Mg2+, and SrTiO3:Pr3+, Al3+ samples.
| Mulliken bond population | SrTiO3:Pr3+ | SrTiO3:Pr3+, Mg2+ | SrTiO3:Pr3+, Al3+ | Bond | Population | Length (nm) | Bond | Population | Length (nm) | Bond | Population | Length (nm) |
| Sr–O | −0.03 | 0.2760 | Sr–O | −0.04 | 0.2765 | Sr–O | −0.04 | 0.2764 | Ti–O | 0.62 | 0.1952 | Ti–O | 0.65 | 0.1933 | Ti–O | 0.68 | 0.1919 | Pr–O | 0.12 | 0.2700 | Pr–O | 0.15 | 0.2608 | Pr–O | 0.15 | 0.2609 | — | — | — | | 0.66 | 0.1902 | | 0.70 | 0.1893 | — | — | — | Mg–O | −0.10 | 0.2015 | Al–O | 0.40 | 0.1910 |
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and are the atoms that are near the impurity atoms (Al and Mg).
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