This achievement not only speeds us forward in the development of real-world solid-state lighting, it demonstrates that LED-based tech is not the only game in town.
Delivering a light yield of over 60 lumens/watt, an organic light-emitting diode (OLED) white light emitter from BASF and Osram Opto Semiconductors also meets international Energy Star SSL Standard with regard to color requirements. Until recently, the color values of OLED lamps have not been within the acceptable band for color coordinates around the Planck curve, as defined by the Energy Star SSL Standard. The color values of the new OLED are within this band – its light retains the white color at different levels of intensity.
The new OLEDs contain phosphorescent metal complexes as emitter materials and customized complementary materials, which ensure optimum constancy of the color temperatures. That means that, owing to the use of new materials, the diodes are very color-stable even when there are variations in luminous intensity. The challenge now is to optimize the life of these OLED tiles, especially by stabilizing the blue emitters.
For more information, visit http://www.basf.com/group/pressrelease/P-08-512