XPS evidence for molecular charge-transfer doping of graphene

► Quantitative determination of charge-transfer doping in TTF (n) doped graphene. ► Quantitative determination of charge-transfer doping in TCNE (p) doped graphene. ► Elucidation of unusual Raman G-band shifts in charge-transfer doped graphenes. ► Explaining differences in conductivity on n- and p-type charge-transfer dopings. ► Unification of molecular charge-transfer and electrochemical dopings in graphene.