Epitaxial Growth of Organic Thin Films by Organic Molecular Beam Epitaxy

Abstract
Epitaxial growth of an organic ultrathin film has been confirmed for the first time by reflection high-energy electron diffraction (RHEED) during film growth. Copper phthalocyanine (CuPc) films were grown heteroepitaxially on a cleaved face of MoS2 under high vacuum of ca. 4×10-9 torr by a newly developed organic molecular beam epitaxy technique. The RHEED pattern revealed that epitaxially grown CuPc has its own lattice constant, which is completely different from that of MoS2 even at the initial deposition stage.