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Organic electroluminescent element

  • US 9,105,873 B2
  • Filed: 03/09/2012
  • Issued: 08/11/2015
  • Est. Priority Date: 03/24/2011
  • Status: Active Grant
First Claim
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1. An organic electroluminescent element comprising:

  • a transparent electrode;

    a fluorescent light-emitter including a blue light-emitting layer and a first green light-emitting layer, the blue light-emitting layer containing a blue light-emitting material having a maximum emission wavelength 460 nm or less, the first green light-emitting layer containing a first green light-emitting material having a maximum emission wavelength in a spectrum between 460 nm and 610 nm;

    a phosphorescent light-emitter including green light-emitting layer and a red light-emitting layer, the red light-emitting layer containing a red light-emitting material having a maximum emission wavelength of 610 nm or more, the second green light-emitting layer containing a second green light-emitting material having a maximum emission wavelength in the spectrum between 460 nm and 610 nm; and

    a reflecting electrode,wherein;

    the maximum emission wavelength of the first green light-emitting material is located on a short wavelength side of the spectrum;

    the maximum emission wavelength of the second green light-emitting material is located on a long wavelength side of the spectrum;

    the blue light-emitting material and the first green light-emitting material are fluorescent light-emitting materials;

    the second green light-emitting material and the red light-emitting material are phosphorescent light emitting materials; and

    the fluorescent light-emitter and the phosphorescent light-emitter are stacked such that an intermediate layer is interposed between the fluorescent light-emitter and the phosphorescent light-emitter.

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