Improving Upconversion Photoluminescence of GdAlO3:Er3+, Yb3+ Phosphors via Ga3+, Lu3+ Doping

Abstract EN

GdAlO3:Er3+, Yb3+ phosphors doped with Lu3+, Ga3+ ions were prepared via coprecipitation.

The influences of substituting Ga3+ for Al3+ and substituting Lu3+ for Gd3+ on the structure and upconversion photoluminescence (UCPL) of the phosphors were studied.

The experimental results show that the crystal textures did not change but the lattice parameters changed slightly via Lu3+, Ga3+ doping.

This results in a decrease in the host phonon energy and a marked improvement in the green emission spectrum at 546nm.

Moreover, the amounts of surface CO2, CO32-, and OH- species gradually decreased with Lu3+, Ga3+ doping.

The combined effects led to an improvement in the UCPL efficiency with Ga3+, Lu3+ doping.