13-02-2020 дата публикации
Номер: US20200052240A1
Принадлежит:
Provided are an electroluminescent device and an electroluminescent display device. The electroluminescent device includes an anode and a cathode facing each other, a light compensation layer located between the anode and the cathode and having a first refractive index, and an emitting material layer located between the light compensation layer and the cathode, and having a second refractive index higher than the first refractive index. 1. An electroluminescent display device comprising:a substrate having a plurality of red, green, and blue pixel regions; and 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,, 'an electroluminescent device on each red, green, and blue pixel regions on the substrate, the device comprisingwherein 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.2. The electroluminescent device of claim 1 , wherein a difference between the first refractive index and the second refractive index is 0.4 or more.3. The electroluminescent device of claim 1 , wherein the emitting material layer is in contact with the cathode.4. The electroluminescent device of claim 1 , wherein the light compensation layer has a thickness smaller than those of the emitting ...
Подробнее