Organic electroluminescent elements, compositions, powders, electronic devices, and novel compounds

Abstract

To provide an organic EL device having a low driving voltage and high external quantum efficiency.SOLUTION: An organic electroluminescence device includes an emission layer composition including a first host material, a second host material, and a dopant material, in which the first host material is a compound represented by the following formula (1), and the second host material is a specific anthracene derivative different from the first host material.SELECTED DRAWING: None

Claims

[Claim 1] A composition for a host material of an organic electroluminescent element, comprising a compound represented by the following formula (1) and a compound represented by the following formulas (2-11), (2-12), or (2-13), wherein the compound represented by the following formula (1) and the compound represented by the following formulas (2-11), (2-12), or (2-13) are different compounds. 【Chemistry 1】 [In formula (1), R1A, R4A to R5A, and R8A are hydrogen atoms. R2A to R3A and R6A to R7A are each independent of each other. Hydrogen atom, or The group is represented by the following formula (1A). L １Ａ Each of them operates independently. Single bond, or It is an unsubstituted ring-forming arylene group with 6 carbon atoms. Ar １Ａ Each of them operates independently. These are unsubstituted ring-forming aryl groups with 6 to 18 carbon atoms. -L １Ａ -Ar １Ａ (1A) (In formula (1A), L １Ａ and Ar １Ａ This is as defined in formula (1) above. If there are two or more groups represented by formula (1A), each of the two or more groups represented by formula (1A) may be the same or different. 【Chemistry 2】 (In equations (2-11), (2-12), and (2-13), X １１Ｂ This is an oxygen atom. R １Ｂ to R ８Ｂ is a hydrogen atom. R11B to R21B are each independently a hydrogen atom or an unsubstituted phenyl group. Ar １Ｂ teeth, (It is an unsubstituted ring-forming aryl group with 6 to 12 carbon atoms.) [Claim 2] The composition according to claim 1, wherein any hydrogen atom in the compound represented by formula (1) is a deuterium atom. [Claim 3] The composition according to claim 1 or 2, wherein in formula (1), Ar 1A is selected from any of the following formulas (a1) to (a4). 【Transformation 3】 (In formulas (a1) to (a4), m1 is 0. m² is 0. m3 is 0. [Claim 4] In formula (1), Ar 1A is Phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, p-terphenyl-4-yl group, p-terphenyl-3-yl group, p-terphenyl-2-yl group, m-terphenyl-4-yl group, m-terphenyl-3-yl group, m-terphenyl-2-yl group, o-terphenyl-4-yl group, o-terphenyl-3-yl group, o-terphenyl-2-yl group, 1-Naphthyl group, 2-naphthyl group, anthryl group, Benzoantryl group, Phenanthryl group, Benzophenanthryl group, Phenalenyl group, Pyrenyl group, Chrysenyl group, Triphenylenyl group, Tetraceryl group, Fluorenyl group, A composition according to claim 1 or 2, selected from the group consisting of the following. [Claim 5] In the above formulas (2-11), (2-12), and (2-13), Ar １Ｂ The composition according to any one of claims 1 to 4, wherein the group is selected from any of the following formulas (a1) to (a4). 【Chemistry 4】 (In formulas (a1) to (a4), m1 is 0. m² is 0. m3 is 0. [Claim 6] The composition according to any one of claims 1 to 5, wherein the compound represented by formula (2-11), formula (2-12), or formula (2-13) is the compound represented by the following formula (2-21), formula (2-22), or formula (2-23). 【Transformation 5】 (In equations (2-21), (2-22), and (2-23), Ar １Ｂ This is as defined in equations (2-11), (2-12), and (2-13) above. [Claim 7] The composition according to any one of claims 1 to 6, wherein any hydrogen atom in the compound represented by formula (2-11), formula (2-12), or formula (2-13) is a deuterium atom. [Claim 8] Cathode and, Anode and, At least one light-emitting layer disposed between the cathode and the anode, It has, The light-emitting layer comprises the composition described in any one of claims 1 to 7. Organic electroluminescent element. [Claim 9] The organic electroluminescent element according to claim 8, wherein the content of the compound represented by formula (1) and the compound represented by formula (2-11), formula (2-12), or formula (2-13) in the light-emitting layer is 80% by mass or more and 99% by mass or less with respect to the entire light-emitting layer. [Claim 10] The organic electroluminescent element according to claim 8 or 9, wherein the content ratio (mass ratio) of the compound represented by formula (1) and the compound represented by formula (2-11), formula (2-12), or formula (2-13) in the light-emitting layer is 40:60 to 60:

40. [Claim 11] The organic electroluminescent element according to any one of claims 8 to 10, wherein the light-emitting layer contains a dopant material, and the content of the dopant material in the light-emitting layer is 1% by mass or more and 20% by mass or less of the entire light-emitting layer. [Claim 12] The organic electroluminescent element according to any one of claims 8 to 11, further comprising an electron injection / transport layer between the cathode and the light-emitting layer. [Claim 13] An electronic device comprising an organic electroluminescent element according to any one of claims 8 to 12.

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