We have synthesized organic hetero-junction comprising of n-type copper hexadecafluorophthalocyanine (F₁₆CuPc) / p-type cobalt phthalocyanine (CoPc) using molecular beam epitaxy (MBE). The current – voltage (J-V)characteristics of hetero-junction are ohmic in the entire bias range (0-100 V), while individual films shows a transition from ohmic to space charge limited conduction with increasing bias. Hetero-junction shows one order of magnitude higher current density than individual F₁₆CuPc and CoPc films, indicating the formation of a charge accumulation layers at the interface. The thickness of charge accumulation regions was found to be ~ 16 nm using Kelvin Probe (KP) method.