Data from spin coated devices using a common cathode and interlayer material demonstrate lifetimes for recently developed solution-processable green and red P-OLED materials of 78,000 hours and 67,000 hours, respectively, from an initial luminance of 1000 candelas per square meter, or cd/m2. This is equivalent to approximately 445,000 hours and 420,000 hours from an operating brightness of 400cd/m2 for these materials. These latest lifetimes represent a 60% and 280% increase in performance for green and red materials over results that were announced in May and March of this year, respectively.
Novaled has also reached significant achievements for blue fluorescent PIN OLEDs: 50,000 hours at 500 cd/sqm in bottom emission answering the request of RGB Active Matrix displays.
Cambridge Display Technology and Sumation are pleased to announce new and improved results for green and blue P-OLED materials.
Data from spin coated devices using a common cathode and a recently developed solution processable green P-OLED material demonstrate lifetimes(1) of 50,000 hours from an initial luminance of 1000 candelas per square meter, or cd/sq.m. This is equivalent(2) to over 285,000 hours from an operating brightness of 400cd/sq.m for this material and represents a 40% increase in lifetime compared to results announced on March 27, 2007.
Blue materials have now been developed with a demonstrated lifetime(1) of 10,000 hours from an initial luminance of 1000 cd/sq.m (or 62,000 hours from an operating brightness of 400cd/sq.m) and a deeper color. CIE chromaticity coordinates for previously reported blues were x=0.14, y=0.21, whereas the latest materials are much deeper (x=0.14, y=0.19). Developing red, green and blue materials with the right color point is particularly important for full color display applications from which richness of color is increasingly being expected and demanded by consumers.