Organic light-emitting device

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United States of America Patent

PATENT NO 9099666
APP PUB NO 20140361274A1
SERIAL NO

14296682

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Abstract

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An organic light-emitting device comprising an anode; a cathode; a first light-emitting layer between the anode and the cathode; and a second light-emitting layer between the first light-emitting layer and the cathode, wherein:

    the first light-emitting layer comprises a hole-transporting material and a first phosphorescent material,the second light-emitting layer comprises a second phosphorescent material; andthe lowest triplet excited state energy level of the hole-transporting material is: (a) lower than the lowest triplet excited state of the second phosphorescent material, and (b) the same as or higher than the lowest triplet excited state energy level of the first phosphorescent material.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO CHEMICAL COMPANY LIMITED2-7-1 NIHONBASHI CHUO-KU TOKYO 1036020 JAPAN
CAMBRIDGE DISPLAY TECHNOLOGY LTDUNITS 8 11 AND 12 CARDINAL BUSINESS PARK CARDINAL WAY GODMANCHESTER PE29 2XG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
King, Simon Godmanchester, GB 55 540
Mohamad, David Godmanchester, GB 4 13

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