Stability evaluation of ZnO nanosheet based source-gated transistors

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Semiconducting nanostructures enable low-temperature, solution-based fabrication of flexible electronics.
• Contact barriers in specific transistor configurations can reduce power consumption and enhance stability.
• ZnO nanowires (NWs) and nanosheets (NSs) are promising materials for nano-transistors.

Purpose of the Study:

• To investigate the performance and stability of ZnO nanowire (NW) and nanosheet (NS) based transistors.
• To compare the stability of field-effect transistors (FETs) and source-gated transistors (SGTs) under various operating conditions.
• To evaluate the potential of SGTs as driver transistors for AMOLED display circuits.

Main Methods:

• Fabrication of single-crystalline ZnO NW and NS based FETs and SGTs on Si/SiO2 substrates.
• Gate bias stress stability tests were conducted in off-state, on-state, and sub-threshold regimes.
• Comparative analysis of device stability and robustness against bias stress variability.

Main Results:

• FETs exhibited better stability in the off-state compared to SGTs.
• SGTs demonstrated superior robustness against bias stress variability in both sub-threshold and on-state regimes.
• ZnO nanostructures facilitate high-performance and stable nano-transistor fabrication.

Conclusions:

• SGTs show significant advantages over FETs for applications requiring high stability, such as AMOLED displays.
• The use of ZnO nanostructures in SGTs contributes to stable device operation and reduced power consumption.
• This research validates the potential of SGTs for next-generation flexible electronic devices.