Toshinao Yuki

23.3: Distinguished Paper: Red‐Phosphorescent OLEDs Employing Bis(8‐Quinolinolato)‐Phenolato‐Aluminum(III) Complexes as Emission‐Layer Hosts

We have developed high-efficiency, long-lived organic light-emitting diode (OLED) devices by introducing red phosphorescent dopants into bis(8-quinolinolato)phenolato-aluminum(III) complexes. The devices exhibited luminance efficiency of 12 cd/A at CIE color coordinates (0.65, 034). The luminance half-decay lifetime is expected to be over 30,000 hours at an initial luminance of 700 cd/m2. We have successfully incorporated these devices into commercial OLED displays.

Red‐phosphorescent OLEDs employing bis(8‐quinolinolato)phenolato‐aluminum(III) complexes as emission‐layer hosts

— We have used bis(8-quinolinolato)phenolato-aluminum complexes as emission-layer hosts in red-phosphorescent OLED devices. This enabled high-efficiency long-lived OLED devices with a simple device structure that does not require a hole-blocking layer. Devices with a red-phosphorescent dopant introduced into a noble bis(8-quinolinolato)phenolato-aluminum complex exhibited a high efficiency of 12 cd/A at CIE color coordinates (0.65, 035) and a long operating lifetime of 30,000 hours or more at an initial luminance of 700 cd/m2. Moreover, triplet-triplet annihilation was reduced in the devices because of the wide emission zone enabled by the complex and the short phosphorescent lifetime of the red-phosphorescent dopant. We have successfully incorporated these red-phosphorescent devices into commercial OLED displays.

25.3: The High Performance Scalable Display with Passive OLEDs

This paper describes a newly developed scalable Passive OLED Display System. The display dimension is no longer limited due to the seamlessly linked module structure. In the class of flat displays over 100 inches in dimension, passive OLED offers potentially significantly lighter weight as well as thinner thickness. A new design technology encompasses passive OLED units linked together to form a larger display without showing joint seams. The development also incorporates a technique to equalize individual display panel. A 155 inch (3.93m) prototype using 2,880 OLED panels have been fabricated. The display can offer the clear character and HD-TV images with wide-viewing angle.