Photoluminescence of disordered ABO(3) perovskites

Intense photoluminescence in highly disordered (amorphous) BaTiO3, PbTiO3, and SrTiO3 prepared by the polymeric precursor method was observed at room temperature. The emission band maxima from the three materials are in the v isible region and depend on the exciting wavelength. The origin of the phot oluminescence was not exactly identified. However, the line shape indicates that confinement effects are not probable. The experimental results indica te that it could be related to the disordered perovskite structure. (C) 200 0 American Institute of Physics. [S0003-6951(00)03032-1].