Organic electroluminescent device

Details Organic electroluminescent device Organic electroluminescent device

1994-07-25

1995-03-21

Weldon, Ulysses

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313505, 313506, H01J 162

Patent

active

053999363

ABSTRACT:
An organic electroluminescent device comprises a cathode, an emitting layer of organic compound including a quinoline derivative, a positive-hole transport layer of organic compound and an anode which are laminated in sequence, further comprising a metal film having a work function equal to or lower than that of the anode and partially disposed between the anode and the positive-hole transport layer. This device achieves a high luminance efficiency per se. The existence of the metal film reduces resistance values of whole anodes. The entering efficiency of the positive-hole carrier is partially decreased due to the metal film line. This metal film line decreases the waste electric current that does not contribute the emission of the emitting layer.

REFERENCES:
patent: 4956031 (1990-09-01), Mori et al.
patent: 5085605 (1992-02-01), Itani et al.
patent: 5227252 (1993-07-01), Murayama et al.

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