[18a-P7-1~23] 12.4 Organic light-emitting devices and organic transistors

[18a-P7-14] Investigation of (NH₄)₂S treated PbS colloidal nano-dot films for field-effect transistors

〇(M1)Yumi Takeichi¹, Kazuyuki Uno¹, Ichiro Tanaka¹ (1.Wakayama Univ.)

Keywords:PbS colloidal nano-dots, (NH4)2S treatment, Field-effect transistors

A semiconductor colloidal nano-dot (CND), which consists of a semiconductor nano crystal and organic ligand molecules, is promising a solution-processible material for various thin film electronic devices. In this study, we used (NH₄)₂S solutions of various concentrations to remove the ligands of the PbS CND thin films, and fabricated field-effect transistors. The carrier mobility was improved as the concentration of (NH₄)₂S was increased, and the highest hole mobility of 1.1×10^-2 cm²V^-1s^-1 was obtained.