Researchers in Korea claim to have improved the color stability of white organic light-emitting diodes (WOLEDs) over a wide luminance range. The team says that stable color was observed between 100 cd/m2 and 10,000 cd/m2 without any change of color index or spectrum shape.
“Phosphorescent emitting materials can theoretically achieve four times higher quantum efficiency compared with fluorescent WOLEDs,” said Lee. “The current power efficiency of WOLEDs is around 65 lm/W, but this can be increased to over 100 lm/W by combining OLED technology with light out-coupling technology.”
