Organic electroluminescence element

Details Organic electroluminescence element Organic electroluminescence element

2008-07-23

2010-12-07

Patel, Vip (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S504000

Reexamination Certificate

active

07847479

ABSTRACT:
An organic electroluminescence element including an organic layer including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer contains at least two light-emitting materials having different Ea values and at least one host material, a concentration of a light-emitting material having a larger Ea value in the light-emitting layer gradually decreases from a cathode side toward an anode side, and a concentration of a light-emitting material having a smaller Ea value in the light-emitting layer gradually decreases from the anode side toward the cathode side.

REFERENCES:
patent: 2009/0026937 (2009-01-01), Kinoshita et al.
patent: 2001-155862 (2001-06-01), None
patent: 2004-6102 (2004-01-01), None
Kido et al., “Multilayer White Light-Emitting Organic Electroluminescent Device,” Science, vol. 267, No. 3, 1995, pp. 1332-1334.

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