RHEED AND OPTICAL CHARACTERIZATION OF ORDERED MULTILAYERS OF PHTHALOCYANINE C60 AND PHTHALOCYANINE PERYLENE-TETRACARBOXYLICDIANHYDRIDE (PTCDA)

Ordered monolayers --> multilayers of trivalent metal phthalocyanines, C60, and the perylenetetracarboxylic dianhYdride (PTCDA) have been fo rmed by molecular beam epitaxy processes on both single crystal MoS2 a nd SnS2, and on MBE-deposited SnS2 thin films. The bulk packing struct ures for the trivalent metal chloride phthalocyanines lend themselves to layered growth during deposition, as do the structures for C60 and PTCDA. RHEED data collected during the formation of [(InPc-Cl)1-4 ML/( C60)1-4 ML]1-20/SnS2/mica multilayers suggests that the structures obs erved during the formation of single component thin films can be susta ined during multilayer formation up to several lattice periods. Absorb ance spectra of Pc/C60 and Pc/PTCDA multilayers show Pc Q-bands with m axima and full widths consistent with the formation of ordered Pc laye rs, provided that the Pc layer thickness is kept at 1-2 monolayers thr oughout the formation of the multilayer assembly.