Enhanced green emission in ZnO/zinc titanate composite materials

ZnO/zinc titanate composite materials and pure ZnO have been prepared by sal-gel method. Their structures and photoluminescence properties have been studied. All the samples show a green emission at about 500 nm. The green emission of ZnO/zinc titanate composite materials is greatly enhanced compared with that of pure ZnO. The green emission is assigned to the defects in ZnO. The emission enhancement is due to the increased defects on the effect of formed zinc titanate in the composite materials. (C) 2010 Elsevier B.V. All rights reserved.