Discrete states of carrier traps and electrical conduction mechanism in organic substances

A theory for the thermally stimulated current (TSC) curve of the first order based on the concept of `the fundamental element´ is discussed. Accurate autoseparation of experimental data is made possible by utilizing the theory. As each curve involved in the data can be determined accurately, three intrinsic parameters of the carrier-trap state, i.e. energy depth, escape frequency factor, and trapped carrier density, can be evaluated simultaneously. The theory was applied to composite experimental TSC data for a purified anthracene single crystal