High-performance TFT Using Oxide Materials

摘要

The realization a large sheet-type display to present ultrahigh-definition video such as 8K Super Hi-Vision (8K) will require a higher speed thin-film transistor (TFT) to control organic light-emitting diode (OLED) devices. The Science & Technology Research Laboratories (STRL) has been researching high-performance TFT technology based on oxide materials for 8K sheet-type displays. Oxide TFTs are promising candidates for driving devices in large-screen OLED displays because they can provide the high mobility (a measure of how easily an electron moves in a particular material) necessary to drive OLED devices and are adaptable to large-area fabrication. The oxide semiconductor IGZO (In-Ga-Zn-O) has been under research and development at numerous institutions, and work has already begun on practical OLED displays based on IGZO-TFTs. On the other hand, making an 8K sheet-type display a reality will necessitate further improvements in mobility, low-temperature technology for forming devices on heat-sensitive plastic substrates, and flexibility so that driving remains stable even when the device is bent.