Preparation of Compensation Ions Codoped SrTiO₃:Pr³⁺ Red Phosphor with the Sol-Gel Method and Study of Its Luminescence Enhancement Mechanism

Figure 3

(a) PL of samples Pr³⁺ single doped SrTiO₃:Pr³⁺ (A: Pr³⁺0.1%mol; B: Pr³⁺0.2%mol; C: Pr³⁺0.5%mol; D: Pr³⁺1%mol; E: Pr³⁺3%mol). (b) PL of samples Mg²⁺ codoped SrTiO₃:Pr³⁺ (A: Pr³⁺0.2%mol, Mg²⁺2%mol; B: Pr³⁺0.2%mol, Mg²⁺4%mol; C: Pr³⁺0.2%mol, Mg²⁺6%mol; D: Pr³⁺0.2%mol, Mg²⁺8%mol; E: Pr³⁺0.2%mol, Mg²⁺10%mol; F: Pr³⁺0.2%mol, Mg²⁺12%mol). (c) PL of samples Al³⁺ codoped SrTiO₃:Pr³⁺ (A: Pr³⁺0.2%mol, Al³⁺0%mol; B: Pr³⁺0.2%mol, Al³⁺1%mol; C: Pr³⁺0.2%mol, Al³⁺5%mol; D: Pr³⁺0.2%mol, Al³⁺10%mol; E: Pr³⁺0.2%mol, Al³⁺15%mol; F: Pr³⁺0.2%mol, Al³⁺20%mol; G: Pr³⁺0.2%mol, Al³⁺25%mol; H: Pr³⁺0.2%mol, Al³⁺30%mol).

(a)

(b)

(c)