Light absorber and organic electroluminescence device including the same

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.