Anthracene derivative host having ranges of dopants
AssigneeEastman Kodak Company
InventorsMichele L. Ricks, Tukaram K. Hatwar, Jeffrey P. Spindler, Lelia Cosimbescu
Life of this patent
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Abstract
A white light-emitting OLED device including spaced anode and cathode, and having blue light-emitting and yellow, orange, or red light-emitting layers, the blue light-emitting layer including a monoanthracene derivative of Formula (I) as a host material: wherein R1-R8 are H; R9 is not the same as R10; R9 is a naphthyl group having no fused rings with aliphatic carbon ring members; and R10 is a biphenyl group having no fused rings with aliphatic carbon ring members; provided that R9 and R10 are free of amines and sulfur compounds.
Claims30
A white light-emitting OLED device including spaced anode and cathode, and having blue light-emitting and yellow, orange, or red light-emitting layers, the blue light-emitting layer including
- a) a monoanthracene derivative of Formula (I) as a host material and a cohost material 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) that is in a range of 4-10% by volume of both host materials
- wherein:
- R1-R8 are H;
- R9 is not the same as R10;
- R9 is a naphthyl group having no fused rings with aliphatic carbon ring members;
- and
- R10 is a biphenyl group having no fused rings with aliphatic carbon ring members;
- and
- provided that R9 and R10 are free of amines and sulfur compounds;
- and
- b) a blue light-emitting dopant, wherein the blue-emitting dopant is from 0.25 to 5% by volume of the host materials.
A white light-emitting OLED device including spaced anode and cathode, and having blue light-emitting and yellow, orange, or red light-emitting layers, the blue light-emitting layer including
- a) a monoanthracene derivative of Formula (I) as a host material and an arylamine cohost that is in a range of4-10% by volume of both host materials
- wherein:
- R1-R8 are H;
- R9 is not the same as R10;
- R9 is a naphthyl group having no fused rings with aliphatic carbon ring members;
- and
- R10 is a biphenyl group having no fused rings with aliphatic carbon ring members;
- and
- provided that R9 and R10 are free of amines and sulfur compounds;
- and
- b) a blue light-emitting dopant, wherein the blue-emitting dopant is from 0.25 to 50% by volume of the host materials.
Dependencies are inferred from the claim text.