World famous Idemitsu blue

In 1985, Idemitsu Kosan began researching OLED materials. The company was exploring the possibility of a new business venture that went beyond the boundaries of its existing petroleum and petrochemical businesses, and its development target was a blue luminescent material, which was considered the most difficult of the three primary colors of light (red, blue, and green) to put into practical use. At the time, "inorganic" semiconductors were attracting the most attention as electronic materials. The development of organic luminescent materials was still uncertain.
Four years after starting development, the research team discovered a fluorescent material called "distyrylarylene" that emits a blue light that is noticeable even in bright places. This was a groundbreaking achievement, as blue light was not yet achievable even with inorganic semiconductors at the time. In 1997, they discovered a blue dopant called "styrylamine" that significantly improved light output and lifespan. They continued to develop technology to extend lifespan and increase efficiency, and finally succeeded in developing a blue luminescent material.
In 1997, our company exhibited the world's first OLED television at the International Display Society held in the United States, which attracted a great deal of attention from around the world.