Organic electroluminescence element

Details Organic electroluminescence element Organic electroluminescence element

2003-11-13

2010-02-16

Yamnitzky, Marie R. (Department: 1794)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S504000, C428S212000, C428S690000, C428S917000

Reexamination Certificate

active

07663304

ABSTRACT:
An organic electroluminescence element comprising: an anode; a first emitting layer comprising at least a first host material and a first dopant; a second emitting layer comprising at least a second host material and a second dopant; and a cathode in the order mentioned: wherein the energy gap Egh1of the first host material, the energy gap Egd1of the first dopant, the energy gap Egh2of the second host material, and the energy gap Egd2of the second dopant satisfy the following formulas; and the luminescent intensity I1at the maximum luminescent wavelength of an emission spectrum derived from the first emitting layer, and the luminescent intensity I2at the maximum luminescent wavelength of an emission spectrum derived from the second emitting layer satisfy the following formula:in-line-formulae description="In-line Formulae" end="lead"?Egh1>Egd1in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Egh2>Egd2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Egd1>Egd2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?I1>3.5×I2.in-line-formulae description="In-line Formulae" end="tail"?

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Machine Translation of JP 2000-068057.
Hosokawa et al., “Highly efficient blue electroluminescence from a distyrylarylene emitting layer with a new dopant,” Applied Physics Letters, vol. 67, No. 26, pp. 3853-3855, Dec. 1995.

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