Mn2+, Eu2+ and Eu3+ emission in co-doped LaAl11O18 phosphors

• The hexagonal phase of LaAl11O18 could be obtained by combustion method.
• The multi-color emission bands from Eu2+, Eu3+ and Mn2+ were observed.
• EPR studies confirmed the presence of Eu2+ and Mn2+ ions in the LaAl11O18 host.

The LaAl11O18:Eu–Mn phosphor was prepared at furnace temperature of 500 °C in single step process by solution combustion technique. The sample was characterized by XRD and EDX methods, which showed that the hexagonal phase and presence of dopants, respectively. The absorption in the 230–800 nm region and excitation spectrum corresponding to the emission at 442, 514 and 616 nm for LaAl11O18:Eu–Mn phosphor have been recorded. The EPR spectrum of this phosphor exhibits the signals with the effective g values at g ≈ 7.50, 4.82 and 1.97. The existence of Eu2+ and Mn2+ in LaAl11O18 matrix was confirmed by EPR experiments.