[22p-P04-1~16] 12.1 Fabrications and Structure Controls

[22p-P04-1] Preparation of Oriented Floating Film of n-type Polymeric Semiconductor

〇(M2)Yuya Sugita¹, Manish Pandey¹, Heriyanto Syafutra¹, Yongyoon Cho¹, Varun Vohra², Hiroaki Benten¹, Masakazu Nakamura¹ (1.NAIST, 2.UEC)

Keywords:organic transistor, n-type polymer, control of orientation

Conjugated polymers (CPs) are a potential candidate for the active layer of organic field-effect transistor (OFETs) due to inherent flexibility, and ease of film processing. Field-effect mobility in OFETs enhances when CPs are oriented along the channel. Many solution processing methods have been reported to uniaxially orient CPs. However, most of them are neither suitable for large-area film fabrication nor compatible for hetero-structured devices. At the same time, there are very few reports about the preparation of oriented n-type CPs. Unidirectional floating film transfer method (UFTM) for large-area film fabrication with oriented polymer chains offers various advantages in solving most of the existing issues with other conventional techniques. Using UFTM, fabrication of highly oriented floating film of n-type CP (N2200) will be presented for the first time. These films can be transferred on any substrates by their adhesive force. Films were found to have high dichroic ratio (DR) and orientation is highly dependent on the casting parameters. In addition to this, charge transport anisotropy of thus oriented films in OFETs will be also presented.