Light absorber and organic electroluminescence device including the same
Provided is an organic electroluminescence device provided with a light absorber represented by Formula 1 below, and a light absorbing layer including the same. In Formula 1, Ar is pyrene, chrysene, or anthracene, and Y is a hydrogen atom or a substituent, and X is represented by any one of Formula 2-1 to 2-3 below.
1. An organic electroluminescence device comprising:
a first electrode;
a hole transport region provided on the first electrode;
a light emitting layer provided on the hole transport region;
an electron transport region provided on the light emitting layer;
a second electrode provided on the electron transport region; and
a thin film encapsulating layer on the second electrode,
wherein the thin film encapsulating layer comprises a light absorber represented by Formula 1 below:
X—Ar—Y Formula 1
wherein in Formula 1 above,
Ar is pyrene, chrysene, or anthracene,
Y is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted acrylate group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, a substituted or unsubstituted carbonyl group, a substituted or unsubstituted benzophenone group, a substituted or unsubstituted benzoate group, or a substituted or unsubstituted salicylate, and
X is represented by any one of Formula 2-1 to 2-3 below.
2. The organic electroluminescence device of claim 1 , wherein the thin film encapsulating layer comprises one or more inorganic layers and one or more organic layers, and
wherein at least one of the organic layers includes the light absorber.
3. The organic electroluminescence device of claim 1 , wherein Formula 1 above is represented by any one of Formula 1-1 to 1-3 below:
wherein in Formula 1-1 to 1-3 above, X and Y are the same as defined in Formula 1.
4. The organic electroluminescence device of claim 1 , wherein Formula 1 above is represented by any one of Formula 1-4 to 1-6 below:
wherein in Formula 1-4 to 1-6 above, X and Y are the same as defined in Formula 1.
5. The organic electroluminescence device of claim 1 , wherein Formula 1 above is represented by any one of Formula 1-7 to 1-9 below:
where in Formula 1-7 to 1-9 above, X and Y are the same as defined in Formula 1.
6. The organic electroluminescence device of claim 1 , wherein Y is a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracene group, a substituted or unsubstituted phenanthrene group, a substituted or unsubstituted dibenzofuran group, or a substituted or unsubstituted dibenzothiophene group.
7. The organic electroluminescence device of claim 1 , wherein Y is represented by any one of the following structural formulas:
8. The organic electroluminescence device of claim 1 , wherein X is represented by Formula 2-1, and Y is represented by Formula 3 below:
wherein in Formula 3 above, R is a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms.
9. The organic electroluminescence device of claim 1 , wherein the light absorber is represented by Formula 1-13 below:
10. The organic electroluminescence device of claim 1 , wherein the light absorber has an absorbance of 0.7 or more in a wavelength range of 380 nm to 410 nm.
11. The organic electroluminescence device of claim 1 , wherein the thin film encapsulating layer covers the first electrode, the hole transport region, the light emitting layer, the electron transport region, and the second electrode.
12. The organic electroluminescence device of claim 1 , wherein the light absorber represented by Formula 1 above is any one selected from the compounds represented by Compound group 1 below:
13. The organic electroluminescence device of claim 1 , wherein organic electroluminescence device further comprise a capping layer disposed between the second electrode and the thin film encapsulating layer.
14. The organic electroluminescence device of claim 13 , wherein the capping layer includes the light absorber represented by Formula 1 above.
15. The organic electroluminescence device of claim 14 , wherein the capping layer includes the light absorber represented by Formula 1-13 below:
16. The organic electroluminescence device of claim 14 , wherein the capping layer comprises at least one selected from the compounds represented by Compound group 1 below: