Effect of iodine doping of phthalocyanine on the photocurrent generation in a phthalocyanine/C60 heterojunction

► The C60 film deposited on a NiPc-Ix film encapsulates the doped iodine. ► An iodine-doped device generates a photocurrent of inverted direction. ► The internal electric field is also inverted. ► The activity of photocurrent generation at the heterojunction is quenched. ► Photocurrent is generated at the C60/In interface.