Light emitting element, display device including the same, and charge transport material for the light emitting element

A display device comprising:

• a base layer, and a light-emitting element disposed on the base layer,
• wherein the light-emitting element comprises:
• a first electrode, a second electrode, and at least one functional layer disposed between the first electrode and the second electrode,
• the at least one functional layer including a charge transport material derived from a mixture of an azide compound represented by Formula 1 and a polymer compound including an aromatic ring group:
• wherein, in Formula 1,
• n1 is an integer of 1 to 9,
• R1 and R2 are each independently a hydrogen atom or an optionally substituted alkyl group having 1 to 10 carbon atoms,
• R3 and R4 are each independently a hydrogen atom or an optionally substituted alkyl group having 1 to 9 carbon atoms,
• wherein a mole ratio of moles of the azide compound of Formula 1 to moles of the polymer compound is about 1:1.85 to about 1:3.0, and the azide compound includes only one azide group.

A charge transport material derived from a mixture of an azide compound represented by Formula 1 and a polymer compound including an aromatic ring group:

• wherein, in Formula 1,
• n1 is an integer of 1 to 9,
• R1 and R2 are each independently a hydrogen atom or an optionally substituted alkyl group having 1 to 10 carbon atoms,
• R3 and R4 are each independently a hydrogen atom or an optionally substituted alkyl group having 1 to 9 carbon atoms,
• wherein with respect to the total number of moles of the azide compound and the polymer compound in the charge transport material, the mole percent of the azide compound is about 25 mol % to about 35 mol %, and the azide compound includes only one azide group.