Importance

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Abstract

An organic light-emitting device comprising an anode; a cathode; and a first light-emitting layer between the anode and the cathode, wherein the first light-emitting layer comprises a fluorescent light-emitting material of formula (I): (Formula (I)) wherein Ar¹ and Ar² each independently in each occurrence is a substituted or unsubstituted aryl or heteroaryl group; n and m independently in each occurrence is 1, 2 or 3; R independently in each occurrence is a substituent; and Ar¹ and Ar² linked directly to the same N atom may be linked by a direct bond or a linking unit to form a ring; and wherein a first phosphorescent light-emitting material is provided in the first light-emitting layer or in a second light-emitting layer adjacent to the first light-emitting layer.

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First Claim