Gd2O2S:Tb phosphor thin films have been prepared using the simple technique of electron beam evaporation for large area display applications. The photoluminescence and excitation spectra measurement of Gd2O2S:Tb phosphor thin films suggest that Tb3+ is incorporated into the Gd2O2S lattice at gadolinium sites. Relatively efficient electroluminescence is observed from a ZnS/Gd2O2S:Tb/ZnS sandwich cell.