3 Stack-3 Color White OLEDs for 4K Premium OLED TV

摘要

We report an improved 3-stacked white organic light emitting diode (WOLED) structure comprised of layers emitting red and yellow-green phosphorescence in the 2nd stacked device. We focused on developing the WOLED devices to realize 4K premium OLED TV displaying very high brightness and excellent color characteristics, with the optimized color layer. The WOLED has a high current efficiency of 83 cd/A, and cool white color whose color coordinate is (0.297, 0.317). 65-inch 4K premium OLED TV employing the new WOLED shows 800 nit of peak brightness, and 99 percent color gamut in DCI color space.