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Light emitting element and light emitting device using the same

  • US 8,872,169 B2
  • Filed: 01/10/2013
  • Issued: 10/28/2014
  • Est. Priority Date: 07/23/2004
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • a first electrode comprising a metal;

    a first layer over and in direct contact with the first electrode, the first layer comprising a first substance with a hole transporting property and a second substance with an electron accepting property with respect to the first substance;

    a second layer over and in direct contact with the first layer, the second layer comprising a third substance with an electron transporting property and a fourth substance with an electron donating property with respect to the third substance;

    a light emitting layer over the second layer; and

    a second electrode over the light emitting layer.

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