MANHASSET, N.Y. Universal Display Corp. and German partner Novaled AG have teamed up to develop a saturated red phosphorescent organic light-emitting diode (PHOLED) with record specifications.
Researchers combined the partners' OLED technologies and materials to build a device that attains a record power efficiency of 12 lumens/W at 1,000 candelas/meters2 brightness. Luminous efficiency was 15 candelas/ampere at an operating voltage of less than 4 volts.
Universal Display's phosphorescent OLED technology exhibits internal quantum efficiency as much as four times higher than conventional OLED technology, the company claims. Novaled claims its proprietary doping technology and materials enable OLEDs to operate at up to three times lower voltage than with other technologies.
The red PHOLED device registered peak external quantum efficiency of 16 percent, and has a projected operational lifetime of greater than 150,000 hours at an initial luminance of 500 cd/m2.
Results of the collaboration were presented by Novaled's Tobias Canzler at the SPIE conference in San Diego on Wednesday, (Aug. 16).
Universal Display (Ewing, N.J.) is working with Princeton University and has display development programs with other partners, including Tohoku Pioneer Corp., Samsung SDI, AU Optronics, DuPont Displays, Seiko Epson and Sony.
Novaled (Dresden, Germany) develops OLEDs and set up an industrial cooperation with Ciba Specialty Chemicals to produce organic dopant and transport materials developed by Novaled.