Four novel Cd(C5F6HO2)(2).polyether adducts were prepared through simple procedures with stoichiometric quantities of cadmium oxide, hexafluoroacetylacetone C5F6H2O2, and different polyethers. The products were characterized by elemental analysis, X-ray single-crystal analysis, mass spectra, NMR spectra, thermal measurements, and infrared transmittance spectroscopy. X-ray single-crystal data of the Cd(C5F6HO2)(2).polyether adducts showed that all the oxygen atoms of the polyether molecules coordinate the cadmium cation. Very mild heating (44-74 degreesC) resulted in thermal stable, liquid compounds which, in turn, can be easily evaporated. Gas-phase deposition experiments, in a low-pressure horizontal hot-wall reactor, on SiO2 substrates, resulted in CdO films. XRD measurements provided evidence that they consist of cubic, (100)-oriented, crystals. UV-vis spectra showed that the transmittance of as-deposited films in the visible region is about 90%.
|Titolo:||Synthesis and characterization of liquid MOCVD precursors for thin films of cadmium oxide|
|Data di pubblicazione:||2002|
|Appare nelle tipologie:||1.1 Articolo in rivista|