Thermally stimulated current study of space-charge formation and contact effects in metal-polyethylene terephthalate films-metal systems. III. Influence of heat treatments
التفاصيل البيبلوغرافية
العنوان:
Thermally stimulated current study of space-charge formation and contact effects in metal-polyethylene terephthalate films-metal systems. III. Influence of heat treatments
The influence exercised by heat treatments on the charge exchange properties of the interfacial barriers existing in metal-insulator-metal (MIM) systems obtained by vacuum deposition of aluminum electrodes on both faces of thin polyethylene terephthalate (PET) films has been investigated by using the thermally stimulated depolarization current (TSDC) method. A number of parameters have been systematically varied, including annealing atmospheres (helium, helium + oxygen, helium + nitrogen, vacuum, or air), annealing temperature, annealing time, sample fixing mode (free or taut annealing) and order adopted for applying the two procedures of annealing and metallization. The variations observed have been interpreted in terms of the electronic band model developed in the first paper of this series. X-ray photoelectron spectroscopy, thermomechanical analysis, density, aluminum adhesion and oxygen permeation measurements, were used to specify both volume and interfacial modifications undergone by the MIM structures and to support the TSDC data.
