[12a-N205-1~12] 12.4 Organic light-emitting devices and organic transistors

[12a-N205-8] High-Performance Organic Field-Effect Transistors of Methylthiolated Pyrene Single Crystals

〇(P)Kirill Dmitrievich Bulgarevich¹, Kazuo Takimiya^1,2,3, Mamatimin Abbas4⁴, Shingo Horiuchi^1,2, Takuya Ogaki¹, Kohsuke Kawabata^1,2, Abduleziz Ablat⁴ (1.RIKEN, 2.Tohoku Univ., 3.AIMR Tohoku Univ., 4.Univ. of Bordeaux)

Keywords:Single-crystal OFETs, Crystal-structure control, Band transport

In this study, we found that 1,3,6,8-tetrakis(methylthio)pyrene (MT-pyrene), a known compound with no report of the crystal structure, crystallizes into a new type of two-dimensional π-stack structure, in contrast to the dimeric herringbone structure of the parent pyrene. The single-crystal MT-pyrene OFETs fabricated by physical vapor transport method showed almost ideal device characteristics when driven at low voltages under atmospheric conditions, extremely high mobility (32 cm² V^-1 s^-1, on average), band transport, and very low trap density. It was shown that MT-pyrene is an excellent semiconductor material for single-crystal OFETs.