ペンタセン単結晶表面上におけるパーフルオロペンタセンのエピタキシャル成長

抄録

Heterojunctions of π-conjugated molecules are fundamentals of electronic functionalities in organic semiconductor devices, yet the leading principles determining the structures of the molecular heterojunctions are still unestablished. In the present study, a well-defined organic “complementary” pn-heterojunction of perfluoropentacene (C₂₂F₁₄) overlayers formed on the single crystal surface of pentacene (C₂₂H₁₄) was examined by means of grazing-incidence x-ray diffraction and atomic force microscopy. It is revealed that the perfluoropentacene molecules crystallize epitaxially to align their nearest-neighbor direction ({010} axis) along the {110} axis of the pentacene single crystal.