Pyramid Shape Means Brighter Organic LEDs

June 26, 2014
The most common kind of light bulb in the United States, the incandescent, is only about 5% efficient. The phosphorescent organic light-emitting diode, on the other hand, makes light out of 100% of the electricity that goes into it. They're good for smartphone screens and mood lighting, but they drop off in both efficiency and lifetime when they have to shine brightly.
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