Light emitting element

A light emitting element, comprising:

• a first electrode;
• a second electrode disposed on the first electrode;
• an emission layer disposed between the first electrode and the second electrode;
• and
• a double buffer layer comprising:
• a first layer disposed on the emission layer;
• and
• a second layer disposed on the first layer, wherein
• the first layer comprises a first compound,
• the second layer comprises a second compound which is different from the first compound, and
• the first compound and the second compound are each independently represented by Formula 1 or Formula 2:
• wherein in Formula 1,
• R1 is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group of 2 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or is combined with an adjacent group to form a ring, and
• n is an integer from 0 to 4,
• wherein in Formula 2,
• R2a, R2b, and R2c are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group of 2 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or are combined with an adjacent group to form a ring,
• m1 is an integer from 0 to 4, and
• m2 is an integer from 0 to 3.

A light emitting element, comprising:

• a first electrode;
• a second electrode disposed on the first electrode;
• an emission layer disposed between the first electrode and the second electrode;
• a double buffer layer comprising:
• a first layer disposed on the emission layer;
• and
• a second layer disposed on the first layer;
• and
• an electron transport region disposed on the double buffer layer, wherein
• the first layer comprises a first compound,
• the second layer comprises a second compound which is different from the first compound,
• the emission layer comprises a third compound which is different from at least one of the first compound and the second compound, and
• the first compound, the second compound, and the third compound are each independently represented by Formula 1 or Formula 2:
• wherein in Formula 1,
• R1 is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group of 2 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or is combined with an adjacent group to form a ring, and
• n is an integer from 0 to 4,
• wherein in Formula 2,
• R2a, R2b, and R2c are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group of 2 to 20 carbon atoms, a substituted or unsubstituted aryl group of 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group of 2 to 30 ring-forming carbon atoms, or are combined with an adjacent group to form a ring,
• m1 is an integer from 0 to 4, and
• m2 is an integer from 0 to 3.