Synthesis, characterization, and field-effect transistor performance of a two-dimensional starphene containing sulfur

Abstract

A novel two-dimensional (2D) starphene containing sulfur organic semiconductor material BTBTT was synthesized. The spectroscopy, electrochemistry and thermostability of the semiconductor material were investigated, and it was observed that the compound exhibits good stability. The BTBTT exhibits a strong aggregation tendency, forming long single-crystal nanowires, as evidenced by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The organic field-effect transistors (OFETs) devices were fabricated based on the thin films and single-crystal nanowires of BTBTT, respectively, which exhibit excellent FET performances with a high hole mobility of up to 0.56 cm² V⁻¹ s⁻¹ with low threshold voltages.