[16a-B5-1~13] 12.1 Fabrications and Structure Controls

△ [16a-B5-12] Spatial uniformity of charge transport of flow-coated pBTTT-C16 films

〇(M2)Kirill Dmitrievich Bulgarevich^1,2, Kenji Sakamoto¹, Takeo Minari¹, Takeshi Yasuda¹, Kazushi Miki^1,2 (1.NIMS, 2.Univ. of Tsukuba)

Keywords:flow-coating, polymer organic semiconductors, organic field-effect transistors

We have investigated the spatial uniformity of the charge transport of a pBTTT-C16 film formed on a highly hydrophobic SiO₂ gate insulator surface by flow-coating. The uniformity was evaluated from the device-to-device variation of a 5 x 12-matrix OFET array fabricated over about 1 cm² area. The device-to-device variation of field-effect mobility was less than 3 % for each of the parallel and perpendicular OFET sets, where the ‘parallel (perpendicular)’ specifies the channel current direction with respect to the flow-coating direction. A very small device-to-device variation was also observed for on-state current, threshold voltage, and sub-threshold swing. These results show the very high spatial uniformity of the flow-coated pBTTT-C16 film in the charge transport.