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OLEDs

  • How OLED Works

  • How OLED Works
    OLED works by passing electricity through micrometer layers of organic semiconductors sandwiched between two electrodes. The electric current travels from the positive to the negative electrode through the organic film, causing the film to emit light.

    OLED works by passing electricity through micrometer layers of organic semiconductors sandwiched between two electrodes. The electric current travels from the positive to the negative electrode through the organic film, causing the film to emit light.

    OLED Cross-section, courtesy www.scienceofspectroscopy.info
    OLED Cross-section, courtesy www.scienceofspectroscopy.info

    Using different materials in the film causes the OLED to emit light of a different color. To protect the organic layers, the OLED is completely sealed between two glass plates.

    Peak theoretical OLED efficiency is up to 140 lum/W.

    OLED performance (2009)

    • up to 20 lm/W in different shades of white and RGB
    • 1,000 cd/m² brightness
    • 10,000 hours lifetime (at 50% initial brightness)
    • 1.8 mm thin
    • <50 cm surface

    It is expected, that OLED efficiency will double every 2-3 years.


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