Luminescence Properties of Er and Si Nanoparticles Co-doped Aluminum Silicate Thin Films

The effects of AI doping on luminescence properties of Er ions (Er} in Er and Si nanoparticles eo-doped Si02 are studied. The purpose of AI doping is to improve concentration quenching of Er+ luminescence and to realize higher concentration Er doping. We show that the concentration quenching is slightly improved by AI doping. However, the luminescence intensity is decreased. In order to clarify the mechanism of photoluminescence (PL) quenching by AI doping, the PL rise and decay time were analyzed. The result indicates that the number of optically active Er is decreased by AI doping.