Electroluminescent Device and Electroluminescent Display Device Including the Same

An electroluminescent display device comprising:

• a substrate having a plurality of red, green, and blue pixel regions;
• and
• an electroluminescent device on each red, green, and blue pixel regions on the substrate, the device comprising:
• an anode and a cathode facing each other, the anode having a first transparent electrode layer,
• a light compensation layer between the anode and the cathode, the light compensation layer having a first refractive index,
• an emitting material layer between the light compensation layer and the cathode, the emitting material layer having a second refractive index higher than the first refractive index,
• an electron transporting layer between the emitting material layer and the cathode, and
• a hole injection layer located between the emitting material layer and the light compensation layer or between the light compensation layer and the anode, the hole injection layer having a third refractive index higher than the first refractive index,
• wherein a thickness of the emitting material layer of the green pixel region is smaller than that of the red pixel region and larger than that of the blue pixel region.