Abstract
The original intent of this study of polyacrylonitrile was to make a (semi)-transparent photovoltaic cell from differentially pyrolyzed layers. This proved to be unfeasible due to lack of physical stability of the thin films pyrolyzed at about 500°C. A secondary intent of this stydy was to determine the feasibility of thin film devices of pyrolyzed polyacrylonitrile as switches for potential use as computer memory devices. While the characteristics important for use as switches improved in PAN with increasing pyrolysis temperature, over the limits imposed by the material itself, PAN does not represent a feasible computer memory element. The study reported here indicates that the threshold switching process in thin films of PAN is electronic in nature, not thermal.
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