Organic electroluminescence device and compound for organic electroluminescence device
An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode, and the emission layer includes a compound represented by Formula 1 below, and thus the organic electroluminescence device may exhibit high luminous efficiency characteristics and improved service life characteristics.
1. An organic electroluminescence device comprising:
a first electrode;
a second electrode on the first electrode; and
an emission layer which is between the first electrode and the second electrode and includes a compound represented by the following Formula 1:
in Formula 1,
at least one selected from among X 2 to X 4 is N, the rest are CR a , or each of X 1 and X 4 among X 1 to X 4 is N, the rest are CR a ,
Y is O or S,
n is 1 or 2,
L is an unsubstituted phenylene or an unsubstituted pyridinylene,
R a is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or is combined with an adjacent group to form a ring, and
Ar is represented by the following Formula 2:
in Formula 2,
W 1 to W 8 are each independently N or CR b ,
Z is a direct linkage, O, or CR c R d , and
R b to R d are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or are combined with an adjacent group to form a ring.
2. The organic electroluminescence device of claim 1 ,
wherein Formula 1 above is represented by the following Formula 1-1 or Formula 1-2 below:
in Formula 1-1 and Formula 1-2, X 1 to X 4 , L, n, Z, and W 1 to W 8 are the same as those defined with respect to Formula 1 and Formula 2.
3. The organic electroluminescence device of claim 1 ,
wherein Formula 2 is represented by any one selected from the following Formula 2-1 to Formula 2-4 below:
in Formula 2-4,
R e is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group of 2 to 30 carbon atoms for forming a ring,
W 9 to W 12 are each independently N or CR f ,
R f is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or are combined with an adjacent group to form a ring, and
in Formula 2-1 to Formula 2-4, W 1 to W 8 are the same as those defined with respect to Formula 2.
4. The organic electroluminescence device of claim 1 ,
wherein Ar is represented by any one selected from the following Ar-1 to Ar-6:
in Ar-3, m1 and m2 are each independently 0 or 1, and
R b1 and R b2 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted arylamine group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring.
5. The organic electroluminescence device of claim 1 ,
wherein L is represented by any one selected from the following L-1 and L-2
6. The organic electroluminescence device of claim 1 ,
wherein the emission layer comprises a host and a dopant, and
the host comprises the compound.
7. The organic electroluminescence device of claim 1 ,
wherein the emission layer emits a delayed fluorescence, and
the compound is a delayed fluorescence dopant.
8. The organic electroluminescence device of claim 1 ,
wherein the emission layer emits light having a center wavelength of 500 nm or more and 550 nm or less, or light having a center wavelength of 450 nm or more and less than 500 nm.
9. The organic electroluminescence device of claim 1 ,
wherein the emission layer comprises at least one selected from compounds represented in the following Compound Group 1 and Compound Group 2:
Compound Group 1
Compound Group 2
10. A compound represented by the following Formula 1:
in Formula 1,
at least one selected from among X 2 to X 4 is N, the rest are CR a , or each of X 1 and X 4 among X 1 to X 4 is N, the rest are CR a ,
Y is O or S,
n is 1 or 2,
L is an unsubstituted phenylene or an unsubstituted pyridinylene,
R a is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or is combined with an adjacent group to form a ring, and
Ar is represented by Formula 2 below:
in Formula 2,
W 1 to W 8 are each independently N or CR b ,
Z is a direct linkage, O, or CR c R d , and
R b to R d are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or are combined with an adjacent group to form a ring.
11. The compound of claim 10 ,
wherein Formula 1 above is represented by the following Formula 1-1 or Formula 1-2:
in Formula 1-1 and Formula 1-2, X 1 to X 4 , L, n, Z, and W 1 to W 8 are the same as those defined with respect to Formula 1 and Formula 2 above.
12. The compound of claim 10 ,
wherein any one selected from among X 1 to X 4 is N, the rest are CR a , or
each of X 1 and X 4 among X 1 to X 4 is N, the rest are CR a , and
R a is a hydrogen atom, or represented by any one selected from the following R a -1 to R a -4:
13. The compound of claim 10 ,
wherein Formula 2 is represented by any one selected from the following Formula 2-1 to Formula 2-4:
in Formula 2-4,
R e is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group of 2 to 30 carbon atoms for forming a ring,
W 9 to W 12 are each independently N or CR f ,
R f is a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, or are combined with an adjacent group to form a ring, and
in Formula 2-1 to Formula 2-4, W 1 to W 8 are the same as those defined with respect to Formula 2 above.
14. The compound of claim 10 ,
wherein Ar is represented by any one selected from the following Ar-1 to Ar-6:
in Ar-3, m1 and m2 are each independently 0 or 1, and
R b1 and R b2 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted arylamine group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring.
15. The compound of claim 10 ,
wherein L is represented by any one selected from the following L-1 and L-2:
16. The compound of claim 10 ,
wherein the compound represented by Formula 1 is a green dopant to emit green light having a center wavelength of 500 nm or more and 550 nm or less.
17. The compound of claim 10 ,
wherein the compound represented by Formula 1 is a blue dopant to emit blue light having a center wavelength of 450 nm or more and less than 500 nm.
18. The compound of claim 10 ,
wherein the compound represented by Formula 1 is a host material.
19. The compound of claim 10 ,
wherein the compound represented by Formula 1, the absolute value of a difference (ΔE ST ) between a lowest singlet excitation energy level (S1) and a lowest triplet excitation energy level (T1) is 0.2 eV or less.
20. The compound of claim 10 ,
wherein the compound represented by Formula 1 is represented by any one selected from compounds represented in the following Compound Group 1 or Compound Group 2:
Compound Group 1
Compound Group 2