CDT & Sumation improve green and red P-OLED materials

New results show dramatic improvement in the lifetimes of polymer OLED materials emitting either green or red light.

Cambridge Display Technology (CDT) and Sumation have announced substantially improved lifetime data for green and red P-OLED materials.

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 cd/m2.

This is equivalent to approximately 445,000 hours and 420,000 hours from an operating brightness of 400 cd/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.

David Fyfe, CEO of CDT, said, "Once again, we are reporting tremendous progress on materials developed at Sumation and tested at CDT's facilities. Rapid material development continues unabated and is a testament to the excellent collaboration between Sumation's research centers in the U.K. and Japan."

CDT qualified its lifetime data by pointing out that it represents accelerated testing of simple test devices at several very high initial luminance levels. Translation of this single-pixel data into performance in a full-color display system depends on a number of factors and requires a complex calculation and knowledge of the precise system design parameters such as aperture ratio, brightness, ink formulation and relative pixel areas.

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