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DE-112025000122-T5 - Organic electroluminescent compound, several host materials and this comprehensive organic electroluminescent device

DE112025000122T5DE 112025000122 T5DE112025000122 T5DE 112025000122T5DE-112025000122-T5

Abstract

The present disclosure relates to organic electroluminescent compounds, multiple host materials, and an organic electroluminescent device comprising these. By incorporating a specific combination of compounds according to the present disclosure as multiple host materials, or by incorporating compounds according to the present disclosure, organic electroluminescent devices with improved driving voltage, luminous efficacy, and/or lifetime characteristics compared to conventional organic electroluminescent devices can be provided.

Inventors

  • DOH YOO-JIN
  • KIM HAE-YEON
  • KIM YOUNG-KWANG
  • KIM CHI-SIK
  • LEE MI-JA
  • KIM YO-SEOP

Assignees

  • DUPONT SPECIALTY MATERIALS KOREA LTD

Dates

Publication Date
20260507
Application Date
20250530
Priority Date
20240531

Claims (20)

  1. Organic electroluminescent device comprising an anode, a cathode, a first light-emitting layer arranged between the anode and the cathode, and a second light-emitting layer arranged between the first light-emitting layer and the cathode, wherein the first light-emitting layer contains a first compound represented by the following formula 1 or the following formula 3 as a first host material, and the second light-emitting layer contains a second compound represented by the following formula 2 as a second host material, and wherein the first light-emitting layer and the second light-emitting layer are in direct contact with each other: where in formula 1 R 1 to R 16 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 2 - C 30 )-alkenyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 - C 30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, or a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring; provided that at least one of R1 to R16 represents -(L) a -(Ar) b ; L independently represents a single bond, a substituted or unsubstituted ( C6 - C30 ) aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl; Ar independently represents a substituted or unsubstituted ( C6 - C30 ) aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl; and a represents an integer from 1 to 4, b represents an integer from 1 to 4, and L and Ar can each be the same or different from each other; where in formula 3 R 50 to R 61 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 2 -C 30 )-alkenyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, or a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring; provided that at least one of R50 to R61 represents -L30 - Ar30 ; L 30 represents a single bond, a substituted or unsubstituted (C 6 -C 12 )-arylene or a substituted or unsubstituted (3- to 30-membered) heteroarylene; Ar 30 is represented by the following formula B-1 or formula B-2, wherein in formulas B-1 and B-2 any one of R 62 to R 71 is linked to L 30 , R 62 to R 71 are each linked independently to L 30 , or for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 2 - C 30 )-alkenyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted tri-(C 1 -C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, or a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring; R67 and R68 may be linked together to form -O-, -S-, -NR80- or -CR81R82- ; R 80 , R 81 and R 82 each independently represent a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl, or a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl; R 81 and R 82 may be linked together to form one or more rings; Ar 1 and Ar 2 each independently represent hydrogen, deuterium, or a substituted or unsubstituted (C 6 -C 3 )-aryl, provided that Ar 1 and Ar 2 are not both hydrogen; and R 100 to R 104 each independently represent hydrogen or deuterium; where in formula 2 Ar A represents a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl or the following formula A-1; where in formula A-1 T 1 represents O, S, CR a R b or NR c ; ring A and ring B each independently represent a substituted or unsubstituted (C 6 -C 30 )-arene ring or a substituted or unsubstituted (3- to 30-membered) heteroarene ring; Ar 11 represents a substituted or unsubstituted (C 6 -C 30 )-aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl; R 17 to R 24 each independently hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 2 - C 30 )-alkenyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted ( 3- to 30 -membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted tri-(C 1 -C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted (C 1 -C 30 )-alkyldi-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted tri-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted fused ring consisting of an aliphatic (C 3 -C 30 )-ring and an aromatic (C 6 -C 30 )-ring or -L 13 -N(Ar 13 )(Ar 14 ) ; R 25 and R 26 each independently represent a site linked to L 12 , or represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 2 - C 30 )-alkenyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 - C 30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl- ( C6 - C30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring, or -L13 -N( Ar13 )( Ar14 ); Ra and Rb each independently represent a substituted or unsubstituted ( C1 - C30 )-alkyl or a substituted or unsubstituted ( C6 - C30 )-aryl, or may be linked together to form one or more rings; R c represents a substituted or unsubstituted (C 1 -C 30 )-alkyl or a substituted or unsubstituted (C 6 -C 30 )-aryl; L 11 to L 13 each independently represent a single bond, a substituted or unsubstituted (C 6 -C 30 )-aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl; and Ar 13 and Ar 14 each independently for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 2 -C 30 )-alkenyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted fused ring consisting of an aliphatic (C 3 -C 30 ) ring and an aromatic (C 6 -C 30 ) ring, a substituted or unsubstituted tri-(C 1 -C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted (C 1 -C 30 )-alkyldi-(C 6 -C 30 )-arylsilyl or a substituted or unsubstituted tri-(C 6 -C 30 )-arylsilyl.
  2. Organic electroluminescent device according to Claim 1 , where two of R 1 to R 16 are in formula 1 -(L) a -(Ar) b .
  3. Organic electroluminescent device according to Claim 1 , where formula 1 is represented by one of the following formulas 1-1 to 1-4: where in formulas 1-1 to 1-4 where R 1 to R 16 , L, Ar, a and b as in Claim 1 are defined.
  4. Organic electroluminescent device according to Claim 1 , wherein Ar 11 and Ar A are each independently selected from the group consisting of a phenyl that is unsubstituted or substituted by deuterium, a biphenyl that is unsubstituted or substituted by deuterium, a terphenyl that is unsubstituted or substituted by deuterium, a naphthyl that is unsubstituted or substituted by deuterium, a phenanthrenyl that is unsubstituted or substituted by deuterium, or a combination thereof.
  5. Organic electroluminescent device according to Claim 1 , wherein Ar 11 is selected from the group consisting of a phenyl that is unsubstituted or substituted by deuterium, a biphenyl that is unsubstituted or substituted by deuterium, a terphenyl that is unsubstituted or substituted by deuterium, a naphthyl that is unsubstituted or substituted by deuterium, a phenanthrenyl that is unsubstituted or substituted by deuterium, or a combination thereof; and Ar A is a dibenzofuranyl that is unsubstituted or substituted by deuterium, or a dibenzothiophenyl that is unsubstituted or substituted by deuterium.
  6. Organic electroluminescent device according to Claim 1 , where formula Ar A is represented by the following formula b-1: where in formula b-1 R 27 to R 32 are each independently a site linked to L 12 , or for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 2 -C 30 )-alkenyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkenyl, a substituted or unsubstituted tes (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted tri-(C 1 -C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted (C 1 -C 30 )-alkyldi-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted tri-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted fused ring consisting of an aliphatic (C 3 -C 30 )-ring and an aromatic (C 6 -C 30 )-ring or - L 13 -N(Ar 13 )(Ar 14 ) may stand or be linked with a neighboring substituent to form one or more rings; and T 1 , R 25 , R 26 , L 13 , Ar 13 and Ar 14 as in Claim 1 are defined.
  7. Organic electroluminescent device according to Claim 1 , where formula 2 is represented by one of the following formulas 2-1 and 2-2: wherein in formulas 2-1 and 2-2 R 27 to R 32 each independently hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 2 -C 30 )-alkenyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring, or -L13 -N( Ar13 )( Ar14 ) are present or linked with a neighboring substituent to form one or more rings. can be R 33 to R 35 , each independently a site linked to L 12 , or for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 1 - C 30 )-alkoxy, a substituted or unsubstituted tri-(C 1 - C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 - C 30 )-alkyl-(C 6 - C 30 ) )-arylsilyl, a substituted or unsubstituted (C 1 - C 30 )-alkyldi-(C 6 - C 30 )-arylsilyl, a substituted or unsubstituted tri-(C 6 - C 30 )-arylsilyl, a substituted or unsubstituted fused ring consisting of an aliphatic (C 3 - C 30 )-ring and an aromatic (C 6 - C 30 )-ring or -L 13 -N(Ar 13 )(Ar 14 ) may be detached or linked with a neighboring substituent to form one or more rings; and T 1 , R 17 to R 26 , L 11 to L 13 , Ar 11 , Ar 13 and Ar 14 as in Claim 1 are defined.
  8. Organic electroluminescent device according to Claim 1 , where formula 3 is represented by the following formula 3-1: where R 51 to R 61 , L 30 and Ar 30 as in Claim 1 are defined.
  9. Organic electroluminescent device according to Claim 1 , wherein at least one of formulas 1 and 2 is a compound comprising deuterium.
  10. Organic electroluminescent device according to Claim 1 , wherein the substituted alkyl, the substituted alkenyl, the substituted aryl, the substituted arylene, the substituted heteroaryl, the substituted heteroarylene, the substituted cycloalkyl, the substituted heterocycloalkyl, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl, the substituted fused ring of an aliphatic ring and an aromatic ring, the substituted arene ring and the substituted heteroarene ring are each independently modified by at least one substituent from the group consisting of deuterium; halogen; cyano; carboxyl; nitro; hydroxyl; phosphine oxide; (C 1 - C 30 )-alkyl, which is unsubstituted or substituted by deuterium; Halogen-( C1 - C30 )-alkyl; ( C2 - C30 )-alkenyl; ( C2 - C30 )-alkynyl; ( C1 - C30 )-alkoxy; ( C1 - C30 )-alkylthio; ( C3 - C30 )-cycloalkyl; ( C3 - C30 )-cycloalkenyl; (3- to 7-membered) heterocycloalkyl; ( C6 - C30 )-aryloxy; ( C6 - C30 )-arylthio; (3- to 30-membered) heteroaryl, unsubstituted or substituted by at least one of deuterium and ( C6 - C30 )-aryl; ( C6 - C30 )-aryl, unsubstituted or substituted by at least one of deuterium, ( C1 - C30 )-alkyl, ( C6 - C30 )-aryl, and (3- to 30-membered) heteroaryl; tri-( C1 - C30 )-alkylsilyl; tri-( C6 - C30 )-arylsilyl; di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl; ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl; amino; mono- or di-( C1 - C30 )-alkylamino; mono- or di-( C2 - C30 )-alkenylamino; mono- or di-(C 6 -C 30 )-arylamino; mono- or di-(3- to 30-membered)-heteroarylamino; (C 1 -C 30 )-alkyl-(C 2 -C 30 )-alkenylamino; (C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylamino; (C 1 -C 30 )-alkyl-(3- to 30-membered)-heteroarylamino; (C 2 -C 30 )-alkenyl-(C 6 -C 30 )-arylamino; (C 2 -C 30 )-alkenyl-(3- to 30-membered)-heteroarylamino; (C 6 -C 30 )-aryl-3- to 30-membered)-heteroarylamino; (C 1 -C 30 )alkylcarbonyl; (C 1 -C 30 )alkoxycarbonyl; ( C6 -C30 )arylcarbonyl; Di-(C 6 -C 30 )-aryl boronyl; ( C6 -C30 )arylphosphine; di-(C 1 -C 30 )alkylboronyl; (C 1 -C 30 )alkyl-(C 6 -C 30 )arylboronyl; (C 6 -C 30 )-aryl-(C 1 -C 30 )-alkyl and (C 1 -C 30 )-alkyl-(C 6 -C 30 )-aryl are substituted.
  11. Organic electroluminescent device according to Claim 1 , where the compound represented by formula 1 is at least one of the following compounds selected: where D n means that n hydrogen atoms are replaced by deuterium, and n is an integer from 1 to the maximum number of hydrogen atoms in the compound.
  12. Organic electroluminescent device according to Claim 1 , where the compound represented by formula 2 is at least one of the following compounds selected: where D n means that n hydrogen atoms are replaced by deuterium, and n is an integer from 1 to the maximum number of hydrogen atoms in the compound.
  13. Organic electroluminescent device according to Claim 1 , where the compound represented by formula 3 is at least one of the following compounds selected: where D n means that n hydrogen atoms are replaced by deuterium, and n is an integer from 1 to the maximum number of hydrogen atoms in the compound.
  14. Organic electroluminescent device according to Claim 1 , wherein the first light-emitting layer further comprises an additional host material, the second light-emitting layer further comprises an additional host material, or both layers further comprise an additional host material.
  15. Organic electroluminescent device according to Claim 1 , wherein the light-emitting dopant of the first light-emitting layer is identical or different from the light-emitting dopant of the second light-emitting layer.
  16. Organic electroluminescent device according to Claim 1 , where both the first light-emitting layer and the second light-emitting layer are light-emitting layers that emit blue light.
  17. Organic electroluminescent compound represented by the following formula 11, comprising at least one deuterium: where in formula 11 R 1 to R 16 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 -C 30 )-alkyl, a substituted or unsubstituted (C 2 -C 30 )-alkenyl, a substituted or unsubstituted (C 6 -C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 -C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 -C 30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl, a substituted or unsubstituted ( C1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl or a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring; with the proviso that at least one of R1 to R16 represents -(L) a -(Ar) b ; L independently represents a single bond, a substituted or unsubstituted ( C6 - C30 ) aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl; Ar independently represents a substituted or unsubstituted ( C6 - C30 ) aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl; and a represents an integer from 1 to 4, b represents an integer from 1 to 4, and L and Ar may be the same or different from each other.
  18. Organic electroluminescent compound according to Claim 17 , with the remaining percentage of hydrogen being between 10% and 20%.
  19. Organic electroluminescent compound according to Claim 17 , with the remaining percentage of hydrogen being between 20% and 30%.
  20. Organic electroluminescent compound according to Claim 17 , where the compound represented by formula 11 is selected from the following compounds: where D n means that n hydrogen atoms are replaced by deuterium, and n is an integer from 1 to the maximum number of hydrogen atoms in the compound.

Description

Technical field The present disclosure relates to an organic electroluminescent compound, several host materials and an organic electroluminescent device comprising these. State of the art A small-molecule green organic electroluminescent device (OLED) was first developed by Tang et al. by Eastman Kodak in 1987 OLEDs were developed using a TPD/ALq3 bilayer consisting of a light-emitting layer and a charge-transport layer. Following this, OLED development progressed rapidly, leading to commercialization. Three types of RGB light-emitting materials are used to realize a full-color OLED display, and the development of RGB light-emitting materials with high luminous efficacy, drive voltage, and/or long lifetime, as well as the development of OLEDs with such properties, are considered important tasks in improving the overall characteristics of organic electroluminescent devices, including resolution. To improve luminous efficacy, drive voltage, and/or lifetime, various materials or concepts for an organic layer of an organic electroluminescent device have been proposed, but these have not proven satisfactory in practical application. Accordingly, there is a continuing need for the development of an organic electroluminescent device with improved performance, such as improved drive voltage, luminous efficacy, power efficiency, and/or lifetime characteristics compared to previously disclosed organic electroluminescent devices. Disclosure of the invention Technical task The objective of the present disclosure is to provide an organic electroluminescent device with improved driver voltage, luminous efficacy and/or lifetime characteristics. As a result of intensive studies to solve the technical problems, it was found in the course of the present invention that the above objective can be achieved by an organic electroluminescent device comprising an anode, a cathode, a first light-emitting layer arranged between the anode and the cathode, and a second light-emitting layer arranged between the first light-emitting layer and the cathode, wherein the first light-emitting layer contains a first compound, represented by the following formula 1 or the following formula 3, as a first host material, and the second light-emitting layer contains a second compound, represented by the following formula 2, as a second host material, and wherein the first light-emitting layer and the second light-emitting layer are in direct contact with each other: where in Formula 1 R1 to R16 each independently for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted ( C1 - C30 ) alkyl, a substituted or unsubstituted ( C2 - C30 ) alkenyl, a substituted or unsubstituted ( C6 - C30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted ( C3 - C30 )-cycloalkyl, a substituted or unsubstituted ( C3 - C30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted ( C1 - C30 )-alkoxy, a substituted or unsubstituted tri-( C1 - C30 )-alkylsilyl, a substituted or unsubstituted di-( C1 - C30 )-alkyl-( C6 - C30 )-arylsilyl, a substituted or unsubstituted (C 1 - C30 )-alkyldi-( C6 - C30 )-arylsilyl, a substituted or unsubstituted tri-( C6 - C30 )-arylsilyl, or a substituted or unsubstituted fused ring consisting of an aliphatic ( C3 - C30 ) ring and an aromatic ( C6 - C30 ) ring; with the proviso that at least one of R 1 to R 16 stands for -(L) a -(Ar) b ; L each independently represents a single bond, a substituted or unsubstituted (C 6 -C 30 )-arylene or a substituted or unsubstituted (3- to 30-membered) heteroarylene; Ar each independently represents a substituted or unsubstituted ( C6 - C30 ) aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl; and a represents an integer from 1 to 4, b represents an integer from 1 to 4, and L and Ar can each be the same or different from each other; where in Formula 3 R 50 to R 61 each independently for hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C 1 - C 30 )-alkyl, a substituted or unsubstituted (C 2 - C 30 )-alkenyl, a substituted or unsubstituted (C 6 - C 30 )-aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkyl, a substituted or unsubstituted (C 3 - C 30 )-cycloalkenyl, a substituted or unsubstituted (3- to 7-membered) heterocycloalkyl, a substituted or unsubstituted (C 1 - C 30 )-alkoxy, a substituted or unsubstituted tri-(C 1 -C 30 )-alkylsilyl, a substituted or unsubstituted di-(C 1 -C 30 )-alkyl-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted (C 1 -C 30 )-alkyldi-(C 6 -C 30 )-arylsilyl, a substituted or unsubstituted tri-(C 6 -C 30 )-arylsilyl or a substituted or unsubstituted fused ring consisting of an aliphatic (C 3 -C 30 )-ring and an aromatic (C 6 -C 30 )-ring; provided that at least one of R 50 to R 61 stands for -L 30 -Ar 30 ; L 30 represents a single bond, a