January 5, 2007—Nippon Steel Chemical Co. (NSCC), a leading manufacturer of super-purified OLED (organic light emitting device) materials, and Universal Display Corporation, a leading developer of OLED technologies and materials, announce a significant enhancement in the performance of green phosphorescent OLEDs resulting from their ongoing technical collaboration.
By combining Universal Display’s green phosphorescent emitter, UDC-GD48, with NSCC’s new green host material, the two companies have achieved record operational lifetime for a green phosphorescent OLED device. This green OLED offers 60,000 hours of operational lifetime at an initial luminance of 1,000 candelas per square meter (cd/m(2)). The device also exhibits a high luminous efficiency of 65 candela per ampere (cd/A) and an external quantum efficiency of 18%, at 1,000 cd/m(2), both characteristic features and benefits of phosphorescent OLED technology.
While these color and efficiency characteristics have previously been reported, obtaining this performance in conjunction with improved operational lifetime is an important milestone for Universal Display and NSCC, according to the companies. They explain that this represents more than a two-fold increase in operational stability, key for commercial success, as compared to previously reported performance. The device also incorporates Universal Display’s proprietary blocking layer material to achieve the reported results. UDC-GD48 is currently available from Universal Display, and NSCC’s new green host material will soon be available from NSCC for evaluation and use in commercial production.
As a milestone of these collaborative development efforts, UDC and NSCC have now established material systems for red and green phosphorescent OLEDs. The companies are also collaborating on the development of blue phosphorescent materials.
Universal Display Corporation develops OLED technologies and materials for flat panel displays, lighting electronic communications, and other opto-electronic products. Nippon Steel Chemical Co., a subsidiary company of Nippon Steel Corporation, manufactures super-purified OLED materials with consistent quality in commercial scale.
For more information visit the Universal Display or Nippon Steel Chemical Web site.
