Abstract
Hafnium indium zinc oxide (HIZO) thin film transistors with zirconium aluminum oxide (AZO) gate dielectric were fabricated by solution-process. The HIZO and AZO oxide thin films have smooth surfaces with root-mean-square roughness of 0.62 nm and 0.35 nm respectively. The thin film transistor with channel length = 6 μm and the ratio of width/length =5 exhibits a high saturation field-effect mobility of 21.3 cm2/V&#183s, a low threshold voltage of 0.3 V, a high on-off ratio of 4.3×107 and a small subthreshold swing of 0.32 V/dec. And these properties of TFT may be impacted by highly-coherent and low trapping states interface between the AZO dielectric and HIZO semiconductors.
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