We present a 7.5 cm x 7.5 cm white PHOLED<sup>TM</sup> lighting panel that delivers 1,000 cd/m<sup>2</sup> with 68 lm/W
efficacy, CRI > 80 and lifetime to LT70 ≈ 15,000 hrs. A simple all-phosphorescent device architecture,
including a highly stable light blue phosphorescent emitter-host system, is used to reduce panel power
consumption, extend operational lifetime and demonstrate exceptional emission color stability with aging.
OLED display manufacturers are interested in white organic light emitting devices (WOLED<sup>TM</sup>s) because these devices, together with color filters, eliminate the need for high resolution shadow masks. 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 spot meter: at 100 cd/m<sup>2</sup> normal luminance, EQE = 20%, power efficacy is 34 lm/W, operating voltage = 3.6 V, CIE = (0.44, 0.44) and CRI = 75.
In this paper, two approaches are demonstrated to narrow phosphorescent OLED (PHOLED) emission lineshapes to
increase color saturation while keeping device high efficiency performance, which is critical for large area flat panel
displays. One approach uses bottom-emissive microcavity structure in green and blue devices to achieve 22 nm full
width half maximum (FWHM) emissions. The other approach is to reduce the natural width of the emission as
exemplifying in a red device. A new NTSC red with 64 nm FWHM emission is reported. In a standard device, it has a
luminous efficiency of 18.3 cd/A at 10 mA/cm<sup>2</sup>.