OLED display manufacturers are interested in white organic light emitting devices (WOLEDTMs) because
these devices, together with color filters, eliminate the need for high resolution shadow masks, and are
scalable beyond Gen 4 substrates. Additionally, WOLEDs are well suited for general-purpose illumination,
since their power efficacies are approaching fluorescent lamps. A new structure was developed that had the
following characteristics that were measured using a 20" integrating sphere: at 100 cd/m2 normal luminance,
EQE = 35%, power efficacy is 62 lm/W, operating voltage = 4.4 V, CIE = (0.33, 0.43) and CRI = 70.