The influence of substrate temperature on growth of para-sexiphenyl thin films on Ir{111} supported graphene studied by LEEM

► Para-sexiphenyl growth on graphene and Ir was observed in real time using LEEM. ► The structure of individual 6P features was analyzed using μLEED. ► At 320 K and 352 K Stranski-Krastanov growth of flat lying 6P is found on graphene. ► Islands formed by upright standing molecules are found on Ir(111). ► At 405 K only propagation of upright 6P islands, nucleated at graphene rims on Ir.