[15p-1G-1~19] 12.4 Organic light-emitting devices and organic transistors

△ [15p-1G-9] Blade coating of molecular-compound n-type thin-film transistors

〇Yosei Shibata¹, Jun'ya Tsutsumi¹, Satoshi Matsuoka¹, Hiromi Minemawari¹, Shunto Arai², Tatsuo Hasegawa^1,2 (1.FLEC-AIST, 2.Univ. Tokyo)

Keywords:semiconducting molecular compound,n-type field effect transistor,solution process

In this study, we report the fabrication of high quality thin films for semiconducting organic charge-transfer compounds composed of benzothienobenzothiophene derivatives (diC_mBTBT) and fluorinated derivatives of 7,7,8,8,-tetracyanoquinodimethane (F_nTCNQ), which have a high degree of layered crystalline structure. Blade-coated thin films with (diC₈BTBT)(F₂TCNQ) solutions have thickness of 30 nm and single crystalline domains. Organic thin-film transistors (OTFTs) fabricated with the compound films exhibited n-type field-effect characteristics, showing a electron mobility of 0.96 cm²/V s. This mobility is consistent with its bulk single crystal transistors. We discuss the formation of thin films and OTFT operation including its air stability.