The effect of various solvents on the back channel of solution-processed In-Ga-Zn-O thin-film transistors intended for biosensor applications

作者：Kim Si Joon; Jung Joohye; Yoon Doo Hyun; Kim Hyun Jae^*

来源：Journal of Physics D: Applied Physics , 2013, 46(3): 035102.

DOI：10.1088/0022-3727/46/3/035102

This study investigated the effects of exposing solution-processed In-Ga-Zn-O (IGZO) thin-film transistors (TFTs), intended for biosensor applications, to various solvents. Various solvents, such as the nonpolar solvent chlorobenzene and the polar solvents ethanol and deionized (DI) water, were dropped and adsorbed on exposed IGZO channel surfaces. All IGZO TFT devices exhibited a negative threshold voltage shift and a sub-threshold swing degradation, without an accompanying degradation in field-effect mobility. These variations depended on the dielectric constant of the solvents; with the exception of the IGZO TFT device exposed to DI water, they all gradually returned to their initial states.

• 出版日期2013-1-23