Thin film of ZnAl2O4:Eu3+ synthesized by a non-alkoxide precursor sol-gel method

Abstract

Europium-doped zinc aluminate (ZnAl2O4:Eu 3+) films were prepared by the dip-coating technique using a non-alkoxide precursor sol-gel method in ethanolic medium. Photoluminescence spectra displayed the main excitation bands at 270 and 393 nm. The emission spectra of the film heated at 500 °C displayed bands at 578, 590, 612, 650 and 698 nm, assigned to the 5D0 →7F J (J =0,1,2, 3, 4) transitions. The films are transparent above 320 nm.