World's Most Efficient White OLED Developed by Panasonic
Sep 12, 2011 Oled-info has reported an advanced development achieved by Panasonic Electric Works in making of the highly efficient OLED device - featuring 128 lm/W efficiency. The efficiency this high was obtained by using a semi-spherical highly-refractive lens to enhance light extraction. The OLED panel is small - only 2x2 mm, and according to Panasonic this is the world's most efficient white OLED.
Also it is reported that PEW team inserted a light extraction layer composed of a highly-refractive material between the emissive layer (EML) and the glass substrate to improve lighting efficiency. The back side uses a high-reflectivity metal material. Detailed calculations were performed to minimize the internal reflection - this doubled the light extraction efficiency to 40%. This panel uses all-phosphorescent materials, and PEW says that this technique is very similar to the technique used by Universal Display when they developed the 102 lm/W device back in 2008.
For more information and original article please refer to: http://www.oled-info.com/panasonic-developed-worlds-most-efficient-white-oled-128-lmw
Author: Alice Jones
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