Liquid-like Slippery Dielectric Surfaces Boosting Electrical Performance of Organic Field-Effect Transistors

However, dynamic wettability—rather than static wettability—has largely been overlooked, hampering the diversity of interfacial engineering. Here, liquid-like slippery surfaces, a unique type of super-wetting surfaces with exceptional dynamic hydrophobicity, were decorated for the first time at semiconductor/dielectric interfaces.

For systematic investigation, a series of siloxane-based molecular layers with varied sliding properties, including liquid-like slippery surfaces, were modified on SiO2 dielectric layers, and compared with conventional trichlorooctadecylsilane (OTDS) surfaces. These surfaces were incorporated into organic field effect transistors (OFETs) featuring a high-performance liquid crystal organic semiconductor (OSC), 2-Dodecyl-7-phenyl[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT-12), to evaluate interfacial wettability, OSC growth, device electrical performance, and interrelated dynamics.