[11a-Z13-1~10] 12.1 Fabrications and Structure Controls

[11a-Z13-7] Molecular Orientation Control by a Reduced Graphene Oxide Layer and its Effect on the Exciton Diffusion Length

〇Minori Sakurai¹, Keitaro Yamada¹, Tomoyuki Koganazawa², Tomoyoshi Suenobu¹, Mitsuharu Suzuki¹, Ken-ichi Nakayama¹ (1.Osaka Univ., 2.JASRI)

Keywords:reduced graphene oxide, molecular orientation control, exciton diffusion length

It is known that the optical properties and mobility can be improved by controlling the molecular orientation of planar π-conjugated molecules from edge-on orientation to face-on orientation during the fabrication of organic thin films. However, there are many unclear points regarding the relationship between diffusion lengths. In this study, we show that we have induced the face-on orientation of α-6T film using the spin-coated reduced graphene oxide film as a template layer, and the exciton diffusion length increases about 1.8 times with the molecular orientation change.