Surface physical properties of non- and Na-treated CuInSe2 layers studied. Evidence of exciton dissociation and charge separation at CuInSe2/ZnPc interface. Strong band bending at the CuInSe2 surface in contact with C60 observed. No evidence for exciton dissociation at the CuInSe2/C60 interface found. Cu-poor phase at CuInSe2/organic interface crucial for charge separation.