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Universal Display Presents White OLED Advances
Aug 2006
Universal Display Corp. of Ewing, N.J., announced advances in its development of white organic light-emitting diode (WOLED) technology for solid-state lighting and flat panel display applications this week at SPIE's Optics & Photonics conference, being held in San Diego, Calif. Bert Alleyne, senior scientist at Universal Display, presented a paper, "White phosphorescent organic light-emitting devices for lighting applications," that highlighted progress in power efficiency, a critical performance parameter for lighting. He reported that the company has achieved a white light source with twice the power efficiency of a standard incandescent bulb and an external quantum efficiency among the highest demonstrated for a single (non-stacked) white OLED. Specifically, the white light source demonstrated 31 lumens per watt, which corresponds to an external quantum efficiency of 29 percent at a luminance of 850 candelas per square meter. The white lighting panel (25 cm squared in size) emits a pleasing, warm white tone with CIE coordinates of (0.37, 0.36), he said. Output coupling enhancements under development at Universal Display and use of its high-efficiency phosphorescent OLED technology and materials made the advance possible, he added. Universal Display's technology is used by the flat panel display, lighting, electronic communications and other optoelectronic markets.

CommunicationsConsumerflat panel displaylight sourcesNews BriefsopticsOptics & PhotonicsPhotonics Tech Briefssolid-state lightingSPIEUniversal Displaywhite organic light-emitting diodeWOLEDLEDs

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