The Japanese researchers have improved the organic light-emitting diodes (OLED), based on a green light emitting phosphor. The new OLED outer reaches 56.9 per cent of the total light produced. This is two times higher than in conventional organic light-emitting diodes.
Effective improvement of organic light-emitting diodes has a very high value of 210 lumens per watt. The brightness of these diodes of 10 candelas per square meter.
New OLED receives light through a substrate of transparent electrodes. Also attached to the substrate glass panel with the index of refraction of 2.03 and a thickness of 0.7 millimeters. Her process in such a way that becomes grating on the surface of the lens.
The efficiency strongly depends on the glass panel. Without it, it is 94.3 lyumena per watt instead of 210.
Organic LEDs are one of the most promising devices for electronics and lighting. Their disadvantage is the high cost and short time of blue LEDs. At the end of 2008, Korean scientists have developed a better material for the blue OLED.
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