Organic electroluminescent device having host material layer...

Details Organic electroluminescent device having host material layer... Organic electroluminescent device having host material layer...

2005-04-05

2005-04-05

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000, C313S503000, C257S079000, C257S040000, C257S102000, C428S690000

Reexamination Certificate

active

06876144

ABSTRACT:
The present invention discloses a white light emitting organic electroluminescent (EL) device able to directly emit continuous full color light containing three different frequency bands and a method for manufacturing such an organic electroluminescent device. The device comprises: a first conductive layer having a first conductive type; a first carrier transmission layer; a second carrier blocking layer; a first host material layer formed on the first conductive layer, wherein the first host material layer is doped with a first guest luminescent material so as to cast a first color light source under a bias voltage; a second host material layer formed on the first host material layer, wherein the second host material layer is doped with a second guest luminescent material so as to cast a second color light source under the bias voltage; a third host material layer formed on the second host material layer, wherein the third host material layer is doped with a third guest luminescent material so as to cast a third color light source under the bias voltage; a first carrier blocking layer; a second carrier transmission layer; and a second conductive layer having a second conductive type formed on the third host material layer.

REFERENCES:
patent: 6661023 (2003-12-01), Hoag et al.
patent: 6717358 (2004-04-01), Liao et al.
patent: 6765349 (2004-07-01), Liao et al.
patent: 20040104394 (2004-06-01), Lin et al.

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