EMANATION THERMAL-ANALYSIS IN THE CHARACTERIZATION OF ZINC-SULFIDE THIN-FILMS PREPARED FROM DIFFERENT PRECURSORS

Zinc sulfide thin films were prepared by the Atomic Layer Epitaxy (ALE ) process from zinc acetate and zinc chloride and studied by emanation thermal analysis (ETA). The effects of different precursors and growt h temperatures were evident in the ETA curves. In the films grown from zinc acetate, thermally induced changes were detected below 95 degree s C and above 400 degrees C which can plausibly be attributed to a hig her amount of volatiles and to a polymorphic transition, respectively. The cubic to hexagonal transition was confirmed by DSC. Doping with t erbium distorts the crystal structure and causes the peaks to become p oorly discernible.