In this study, white organic electroluminescent devices with microcavity structures were developed. A flexible high‐resolution active‐matrix organic light‐emitting diode display with low power consumption using red, green, blue, and white sub‐pixels formed by a color‐filter method was fabricated. In addition, a side‐roll touch display was developed in combination with a capacitive flexible touch screen.

No abstract

We have developed phosphorescent OLEDs utilizing energy transfer from an exciplex to an emitter. The OLEDs based on this mechanism showed quite high efficiency, a long lifetime and low drive voltage. OLED lighting with high power efficiency exceeding 100 lm/W at a practical luminance of 5,000 cd/m2 was also successfully developed.

-A top-emission organic light-emitting diode (OLED) with a microcavity structure combined with a blue/yellow tandem structure was developed. A high-resolution active-matrix OLED display with the world's lowest level of power consumption using the tandem OLED with red, green, blue, and yellow subpixels was fabricated.

We succeeded in developing a deep blue fluorescent OLED exhibiting extremely high external quantum efficiency and a long lifetime by adopting an amine-free material to the hole transporting layer. We have also developed a CAAC-IGZO-FET OLED display with a narrow driver area using this deep blue device.