Wavelength-selective dual p- and n-type carrier transport of an organic/graphene/inorganic heterostructure

(Figure Presented). A novel organic/graphene/inorganic heterostructure, consisting of a graphene layer encapsulated by n- and p- type photoactive materials with complementary absorptions, enables the control of dual n- and p- typed transport behaviors of a graphene transistor under selective UV or visible light illumination. A graphenebased p-n junction created by spatially patterned wavelength-selective illumination using the organic/graphene/inorganic heterostructure is also demonstrated.