Influence of Al3+doping on the energy levels and thermal property of the 3.5MgO·0.5MgF2·GeO2:Mn4+ red-emitting phosphor

Influence of Al³⁺doping on the energy levels and thermal property of the 3.5MgO·0.5MgF₂·GeO₂:Mn⁴+ red-emitting phosphor

Yuan Lin-lin, Xiao-Song Zhang, Xu Jian-Ping, Sun Jian, Jin Han, Liu Xiao-Juan, Li Lin-Lin, Li Lan†

(a) Normalized PLE spectra of the samples with Al₂O₃ content values of 0, 0.05, 0.1, and 0.15 mol for the 657-nm emission of Mn⁴⁺ . The inset shows the variation of peak position for wavelength band 300 nm–380 nm with Al³⁺ concentration. (b) The energy level diagram for the d³ configuration.