SEMICONDUCTING PROPERTIES OF PENTACENE THIN FILMS STUDIED BY COMPLEX IMPEDANCE, SURFACE MOBILTY AND PHOTO-INDUCED EFFECTS

摘要

This paper discusses semiconducting properties of pentacene thin films focusing on complex impedance analysis, accurate carrier mobility determination, and carrier generation/annihilation processes, all of which are fundamental characteristics for any semiconductors. Although pentacene is considered to be a promising material for organic field effect transistors (FETs), there have not been many reports on basic properties as a semiconductor. For actual application and device modeling, quantitative analysis on the basis of experiments will be necessarily required. A carrier response in the semiconductor after majority carrier injection or generation in the film is a target to discuss, since it should affect a single device performance as well as circuit performance.