[19a-A201-1~13] 12.4 Organic light-emitting devices and organic transistors

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[19a-A201-11] Lowering contact resistance in organic single crystal transistors by conductive polymers interlayer

〇(M1)Aoi Morimoto¹, Yu Yamashita^1,2,3, Taiki Sawada¹, Shun Watanabe¹, Jun Takeya^1,2,3 (1.Univ. of Tokyo, 2.NIMS, 3.JST CREST)

Keywords:

organic field effect transistor,contact resistance,interlayer

For the application of organic field-effect transistors (OFET), it is essential to reduce contact resistance by a stable and mass-producible method. In this study, we verified an electrode structure in which highly-doped PTAA, an amorphous polymer, is inserted at the electrode-semiconductor interface of an OFET as an interlayer. In OFET using Cu as electrodes, mobility was improved by more than one order of magnitude, and proper device operation was achieved with a metal species with a small work function. Furthermore, exemplary OFET operation and contact resistance of a few hundred ohm cm were achieved using Au as electrodes. Further contact resistance reduction through highly-density doping of PTAA is expected.