Display device

A display device comprising:

• a substrate;
• and
• a light emitting device on the substrate,
• wherein the light emitting device comprises:
• a first electrode,
• a green auxiliary layer on the first electrode,
• a green light emitting layer on the green auxiliary layer, and
• a second electrode on the green light emitting layer, and
• the green light emitting layer and/or the green auxiliary layer comprises at least one selected from compounds represented by Chemical Formula 3 to Chemical Formula 6:

A display device comprising:

• a substrate;
• and
• a light emitting device on the substrate,
• wherein the light emitting device comprises:
• a first electrode,
• a blue light emitting layer on the first electrode, and
• a second electrode on the blue light emitting layer, and
• the blue light emitting layer comprises at least one selected from compounds represented by Chemical Formula 3, Chemical Formula 4, Chemical Formula 7, or Chemical Formula 8:

A display device comprising:

• a substrate;
• and
• a plurality of light emitting devices on the substrate,
• wherein the plurality of light emitting device comprise:
• a first electrode,
• a hole control layer on the first electrode,
• a respective one of a red light emitting layer, a green light emitting layer, or a blue light emitting layer on the hole control layer,
• an electron control layer on the red light emitting layer, the green light emitting layer, and the blue light emitting layer, and
• a second electrode on the electron control layer, and
• wherein the electron control layer or the hole control layer comprises at least one selected from compounds represented by Chemical Formula 8 to Chemical Formula 11:

A display device comprising:

• a substrate;
• and
• a plurality of light emitting devices on the substrate,
• wherein the plurality of light emitting device comprise:
• a first electrode,
• a hole control layer on the first electrode,
• a red light emitting layer, a green light emitting layer, and a blue light emitting layer respectively arranged on the hole control layer,
• an electron control layer on the red light emitting layer, the green light emitting layer, and the blue light emitting layer,
• a second electrode on the electron control layer,
• a red auxiliary layer between the red light emitting layer and the hole control layer, and
• a green auxiliary layer between the green light emitting layer and the hole control layer,
• the red auxiliary layer comprising a compound represented by Chemical Formula 1, the green auxiliary layer comprising a compound represented by Chemical Formula 3, and the blue light emitting layer comprising a compound represented by Chemical Formula 8: