Novel Technologies for Organic Devices

Electronic devices assembled using organic materials have recently received increased attention for applications related to light emission and absorption. The organic semiconductor materials used in these applications not only manage and improve the performance of the device but also influence the development direction of future electronic devices. Representative applications of electronic devices using organic semiconductor materials include light-emitting diodes (OLEDs) and stretchable devices.

• ① OLED Device

  OLED is one of the most attractive display technologies and has several advantages. OLEDs can emit a wide range of colors and produce deep black levels because there is no backlight, which results in an infinite contrast ratio and a wide viewing angle. OLED displays also have fast response times, wide color gamuts, and low power consumption. One of the greatest advantages of OLED displays is that various concept designs can be created by harnessing their flexibility and transparency. These aspects are significant differentiators and are important in virtual augmented reality devices and automotive displays. Consequently, the demand for organic semiconductor materials for panel production is rapidly increasing.

• ② Stretchable Device

  Stretchable displays are emerging as next-generation displays that can improve user experience with new form factors. Intrinsically stretchable TFTs based on organic semiconductor materials can implement stretchable backplanes with high resolution and high freedom, thereby serving as free-form platforms for display applications such as mobile, AR/VR, and automotive. Conjugated polymers, which are typical organic semiconductor materials, can transport charge carriers and generally have low moduli. Given the “soft” mechanical nature of these polymers, they offer significant advantages over inorganic semiconductors. Currently, we are developing and researching stretchable conjugated polymers that satisfy the demands on both mechanical and electrical properties required for stretchable TFTs. In addition, stretchable conjugated polymers are used as key materials for electronic skin that is in intimate contact with the human body, enabling the continuous and accurate monitoring of various biosignals.

SAIT is researching novel organic materials for use in OLED and stretchable backplanes. We are currently developing OLED materials with higher efficiencies, longer lifetimes, lower power consumption, and better color purity. Our ultimate goal is to develop next-generation OLED materials that will lead the future display industry. In addition, we are conducting research on free-form devices for displays and sensors by developing stretchable semiconductor materials. SAIT aims to change the future through the realization of a new era of organic electronics by developing the foundational technologies that will underpin the next generation of displays.