WOLEDs Containing Two Broad Emitters (Phase II)

Investigating Organization
Universal Display Corporation

Principal Investigator(s)
Brian W. D'Andrade

Subcontractor
University of Michigan – Stephen Forrest
University of Southern California – Mark Thompson

Funding Source
Small Business Innovation R&D, Phase II

Award
DOE Share: $750,000; Contractor Share: $150,000

Contract Period
8/8/07 - 8/8/09

The proposed research will utilize novel OLED fixtures enabling highly efficient stable, organic, solid-state lighting sources to replace short lifetime 12 lm/W incandescent sources, and hence reduce overall energy consumption in the U.S.  Additionally, the research will support future work to attain OLEDs having 150 lm/W power efficacies.

In Phase I, a white OLED containing only two phosphorescent emitters was demonstrated with an efficacy of 24 lm/W at a forward luminance of 800 cd/m2.  The device had a CIE = (0.38, 0.37), a CRI of 71, and a correlated color temperature of 3,900K and met the targets of the Phase I program.

During Phase II, white OLEDs with a simple architecture containing only two phosphorescent emitters and/or as few organic materials as necessary will be developed to enable low-cost white OLED lighting sources.  These devices will have color rendering indexes (CRI) of >75, and efficacy of 60 lm/W at 1,000 cd/m2.

Content dated 2/08