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

Figure 5

PL of different annealing temperature (A: Pr³⁺0.2%mol, Al³⁺25%mol, 890°C; B: Pr³⁺0.2%mol, Al³⁺25%mol, 950°C; C: Pr³⁺0.2%mol, Al³⁺25%mol, 1010°C).