Light emitting element

Details Light emitting element Light emitting element

2005-05-18

2009-11-24

Parker, Kenneth A (Department: 2815)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C428S212000, C257S040000, C313S504000, C313S506000

Reexamination Certificate

active

07622200

ABSTRACT:
The present invention relates to a thin film light emitting element which has low drive voltage. In particular, the present invention relates to a thin film light emitting element which has low drive voltage and in which color purity and luminous efficiency are not deteriorated. A structure of a light emitting element of the present invention comprises at least an electron transporting layer, a light emitting layer containing a luminescent substance, a first region, and a second region are provided between electrodes, wherein the electron transporting layer includes the second region between the light emitting layer and the first region, the first region includes a substance containing a polycyclic condensed ring, and the second region does not include the substance containing a polycyclic condensed ring.

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