Organic Thin Film Transistor with Poly(4-vinylbiphenyl) Blended 6,13-Bis(triisopropylsilylethynyl)pentacene on Propyleneglycolmonomethyletheracetate Dielectric Surface

Abstract

This paper presents the latest results in the use of soluble materials, such as organic semiconductors (OSCs) and gate-dielectrics, for simplified processing of organic thin film transistors (OTFTs). In this work, the fabrication of a solution-processed OTFT, with 6,13-bis(triisopropylsilyiethynyl)pentacene (TIPS-pentacene) and TIPS-pentacene mixed with poly(4-vinylbiphenyl) (PVBP) as the OSC, and propyleneglycolmonomethyletheracetate (PGMEA) as the gate-dielectric, is described. From electrical measurements, we observed exemplary I-V characteristics for these TFTs. Device performance characteristics have been obtained, including the charge carrier mobility (mu) of 1.47 x 10(-2) cm(2)/Vs, threshold voltage (V-T) of -11.36 V, current on/off ratio (I-ON/OFF) of 1.08 X 10(4), sub-threshold swing (SS) of 2.13 V/decade for an OTFT with PVBP blended TIPS-pentacene and mu, of 1.39 x 10(-4) cm(2)/Vs, VT of 0.7 V, I-ON/OFF of 1.64 x 10(3), SS of 4.21 V/decade for an OTFT without polymer binder, individually.