Interfacial Electronic Structure in Organic Semiconductor Heterojunctions

This chapter demonstrates an investigation into the electronic characteristics of CuPc/F16CuPc, BP2T/F16CuPc, ZnPc/C60, VOPc/Ph3, and SnCl2Pc/F16CuPc organic heterojunctions. Organic heterojunctions are categorized according to their interface electronic structure, including accumulation heterojunctions, depletion heterojunctions, and accumulation/depletion heterojunctions. The formation of an organic heterojunction is explained by the mechanism of thermal emission of electrons and an energy band model. A unique law covering organic heterojunctions and inorganic heterojunctions is revealed, which extends the theory of semiconductor heterojunctions.