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Published on: May 24, 2020
Effects of solution temperature on solution-processed high-performance metal oxide thin-film transistors
Keun Ho Lee1, Jee Ho Park, Young Bum Yoo
1Display and Plasma Research Lab, Department of Materials Science and Engineering, Yonsei University, 134 Shinchong-dong, Seoul 120-750, Republic of Korea.
ACS Applied Materials & Interfaces
|March 7, 2013
Summary
Controlling water
Area of Science:
- Materials Science
- Electronics
- Nanotechnology
Background:
- Solution-processed metal oxide thin-film transistors (TFTs) offer a low-cost fabrication route.
- Optimizing precursor solution conditions is crucial for achieving high-performance TFTs.
- Indium zinc oxide (IZO) is a promising material for TFT applications.
Purpose of the Study:
- To develop a novel strategy for fabricating high-performance solution-processed IZO TFTs.
- To investigate the effect of metal precursor solution temperature on the dielectric constant of water and subsequent IZO film properties.
- To establish a correlation between precursor solution temperature, film characteristics, and TFT performance.
Main Methods:
- Fabrication of IZO precursor solutions at varying temperatures (4 °C, 25 °C, 60 °C).
- Fabrication of IZO thin-film transistors (TFTs) using these precursor solutions.
- Annealing of TFTs at different temperatures and characterization of their electrical properties, including mobility.
Main Results:
- IZO TFTs fabricated from a 4 °C precursor solution achieved low-temperature annealing (∼250 °C) and exhibited the highest mobility (12.65 cm²/(V s)).
- TFTs fabricated from higher temperature solutions (25 °C and 60 °C) required higher annealing temperatures (275 °C and 300 °C, respectively) and showed lower mobility.
- The enhanced performance at 4 °C is attributed to the higher dielectric constant of water, facilitating the formation of metal-oxygen-metal (M-O-M) bonds crucial for electron conduction.
Conclusions:
- Controlling the dielectric constant of water through precursor solution temperature is an effective strategy for fabricating high-performance, low-temperature processed IZO TFTs.
- The formation of a high proportion of M-O-M bonds in IZO thin films is critical for achieving high electron mobility.
- This method offers a facile and scalable approach for producing advanced oxide electronics.
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