On the infrared emissions of Er3+/Yb3+ co-doped SrAl2O4

Infrared emitting SrAl2O4:Er3+ and SrAl2O4:Er3+,Yb3+ powder samples were prepared by the urea combustion route. Powder X-ray diffraction technique was used to find the phase formation. Upon excitation at 980 nm, broad infrared emission of Er3+ ions at around 1.54 μm was observed. The dependency of infrared luminescence intensity with co-doping was discussed.