[9p-PA2-1~29] 12.4 Organic light-emitting devices and organic transistors

[9p-PA2-13] Improvement of flow coating method with heating substrates for organic thin film transistors using 2C₄-BDT-dimer

〇(M2)Shingo Mori¹, Hideji Osuga¹, Kazuyuki Uno¹, Ichiro Tanaka¹ (1.Wakayama Univ.)

Keywords:Organic semiconductor, benzodithiophene-dimer derivative, flow coating

We fabricated organic thin film transistors (OTFT) using 2C₄-BDT-dimer thin films grown by flow coating. When the substrates were heated by light irradiation, it was difficult to slowly grow films because the solvent evaporated in a few minutes due to the the heating. Thus, it was investigated to slowly grow films by suppressing extra evaporation of the solvent using a light shielding plate. As a result, when crystal growth rate was 5 μm/s, the carrier mobility was greatly improved.