Abstract: Considering the difficulty in measuring electrons trap density and holes trap density, a surface potential model is suggested in this paper, with which the distributions of electrons trap energy density and holes trap energy density can be studied respectively. Such a method develops the theory of isothermal current put forward by J.G. Simmons. Based on that, a comparison experiment is performed to study the kinetic processes of trap creation in solid organic dielectrics under strong electrical strength. It is shown that trap generation is proportional to the time of field application, and increases exponentially with the field.

Key words: surface potential, organic dielectrics, trap, isothermal current