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Oled device having improved light output

  • US 20060186802A1
  • Filed: 02/24/2005
  • Published: 08/24/2006
  • Est. Priority Date: 02/24/2005
  • Status: Active Grant
First Claim
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1. An organic light-emitting diode (OLED) device, comprising:

  • a substrate;

    an OLED comprising first and second electrodes and one or more layers of organic light-emitting material formed between the electrodes, wherein at least one electrode comprises a transparent electrode, the transparent electrode and layer(s) of organic light-emitting material having a first refractive index range; and

    an encapsulating cover;

    wherein at least one of the substrate or cover comprises a transparent substrate or cover having a second refractive index and through which light from the OLED is emitted;

    and further comprising a light scattering layer located between the substrate and cover, and a transparent low-index element having a third refractive index lower than each of the first refractive index range and second refractive index and located between the scattering layer and the transparent substrate or cover.

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