OSRAM Opto Semiconductors Inc. today announced it has reached the first milestone in its three-year, white OLED project, funded by a $4.65 million grant from the U.S. Department of Energy (DOE). The 2004 DOE grant was issued to research the potential of white OLEDs to save energy in commercial and residential lighting applications.
The advanced white-light prototype is based on multiple, discrete 2-inch x 3-inch white-light devices fabricated on glass substrates. OSRAM's first-year deliverable is an advanced prototype light source where each tile in the module has a luminous efficacy of 7 lumens-per-watt (lm/W) and a color-rendering index (CRI) of about 80. The prototype operates at an average luminance of 250 nits. At program end, OSRAM will produce a color-balanced OLED white-light source with a luminous efficacy of 40 lumens per watt at 800 nits and an operating half-life of 3,000 hours.