Electroluminescent element and light-emitting device

Details Electroluminescent element and light-emitting device Electroluminescent element and light-emitting device

2011-01-04

2011-01-04

Tarazano, D. Lawrence (Department: 1786)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S212000, C428S917000, C313S504000, C313S506000

Reexamination Certificate

active

07862906

ABSTRACT:
An electroluminescent element which can easily control the balance of color in white emission (white balance) is provided according to the present invention. The electroluminescent element comprises a first light-emitting layer containing one kind or two or more kinds of light-emitting materials, and a second light-emitting layer containing two kinds of light-emitting materials (a host material and a phosphorescent material) in which the phosphorescent material is doped at a concentration of from 10 to 40 wt %, preferably, from 12.5 to 20 wt %. Consequently, blue emission can be obtained from the first light-emitting layer and green and red (or orange) emission can be obtained from the second light-emitting layer. An electroluminescent element having such device configuration can easily control white balance since emission peak intensity changes at the same rate in case of increasing a current density.

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