White organic light emitting device

Details White organic light emitting device White organic light emitting device

2011-03-15

2011-03-15

Hines, Anne M (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000

Reexamination Certificate

active

07906900

ABSTRACT:
A white organic light emitting device (OLED) includes an anode and a cathode spaced apart from each other; a blue light emitting layer, a green light emitting layer, and a red light emitting layer sequentially formed between the anode and the cathode; a first buffer layer formed between the blue light emitting layer and the green light emitting layer, and having a HOMO (highest occupied molecular orbital)−LOMO (lowest occupied molecular orbital) energy gap higher than or equal to that of the adjacent light emitting layers; and a second buffer layer formed between the green light emitting layer and the red light emitting layer, and having a LOMO energy level higher than that of the red light emitting layer.

REFERENCES:
patent: 2004/0012331 (2004-01-01), Yamazaki et al.

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