research on next-generation oxide semiconductor materials and TFT technology

Professor Lee Sang-ryul's research team at Gachon University, research on next-generation oxide semiconductor materials and TFT technology

A research team led by Lee Sang-ryul, a professor of semiconductor engineering at Gachon University, is conducting oxide semiconductor (TFT) based thin film transistor (Oxide Semiconductor) research that can be applied to next-generation displays and future electronic devices.

The research team analyzes changes in electrical properties and physical properties according to changes in the composition of oxide semiconductors, and is developing material design technology to implement high-performance TFTs based on this. In particular, by introducing elements such as Al, Ga, Si, and Hf into Zn-Sn-O-based oxide semiconductors, oxygen vacancies and defect conditions are controlled, and mechanisms for improving mobility, threshold voltage, switching characteristics and stability are identified.

In addition, various physical property evaluation techniques such as XPS, UV-visible spectroscopy, AFM, and DOS analysis are used to systematically study the correlation between the chemical and optical properties and electrical properties of materials. Through this, the effect of defect structures in oxide semiconductors on device performance is quantitatively analyzed, and the next-generation oxide TFT design direction is suggested.

In addition to analyzing the basic electrical characteristics of TFTs, the research team is conducting various application studies such as inverters, logic devices, and neuromorphic devices, and is expanding its research area to next-generation electronic devices such as display backplane, sensor, and artificial intelligence hardware.

"Oxide semiconductors are attracting attention as key materials for next-generation electronic devices based on high mobility and excellent process compatibility," Professor Lee Sang-ryul said. "We intend to contribute to the development of future semiconductor technologies through research ranging from material development to device implementation, physical property analysis, and application technology."

The research team is comprehensively studying material design, defect control, device implementation, and application technologies of oxide semiconductors and is pushing to secure key source technologies in the next-generation electronic device field.