Mitsubishi Chemical Corporation (MCC) announced that it has developed an Organic Light-Emitting Diode (OLED) device with the highest efficiency in its new blue phosphorescence OLED material. The new OLED material is expected to open the way to the development of a new class of large flat-panel displays.
Unlike LCD screens, OLED devices emit light when an electric current is applied and do not require a backlight to function. They consume less power, have a wider viewing angle and display a brighter image with a refresh rate that is a thousand times faster than LCDs.
Current applications of OLED technology are limited to smaller display screens of mobile phones, car audio, portable music players and similar products because of the difficulty applying current OLED technologies to large screens. This problem could be solved with the evolution of Mitsubishi's OLED technology.
The newly developed OLED device employs MCC's own blue phosphorescence host material (wet-coating type), hole blocking material, and hole injection material to optimize the design of a device to achieve the current efficiency of 30 cd/A at the intensity of 100 cd/m2 (external quantum efficiency: 13%), more than twice that of conventional blue wet-coating type OLEDs.
Dr. Junji Kido, a professor at Yamagata University and the internationally recognized lead scientist on the OLED project, said, ¡°It is far superior to existing lines in terms of efficiency of phosphorescence emission. We expect to have early success in practical applications.¡±
Dr. Yoshimitsu Kobayashi, president and CEO of MCRC, stated, ¡°This achievement is a milestone in the development of OLED technologies, because this enables OLED to be applied to flat-panel displays.¡±
Mitsubishi Chemical
