An organic electroluminescent device, its manufacturing method, and display device

Abstract

The invention discloses an organic electroluminescent device, a manufacturing method thereof, and a display device, which are used for improving the color gamut of the organic electroluminescent device using white light as a light source, and improving the problem that the color of the organic electroluminescent device is yellowish after aging . The organic electroluminescent device includes a base substrate, a white light-emitting layer, a red sub-pixel filter layer, a green sub-pixel filter layer and a blue sub-pixel filter layer arranged on the base substrate, and a first A hole transport layer and a second hole transport layer; the first hole transport layer is arranged between the first anode corresponding to the blue sub-pixel filter layer and the white light emitting layer, and covers the display area of ​​the base substrate; the second The hole transport layer is located above the first anode and covers the display area of ​​the base substrate; and the horizontal plane where the first anode is located is at least the second anode corresponding to the green sub-pixel filter layer and the third anode corresponding to the red sub-pixel filter layer. The levels at which one of the anodes are located are at different levels.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescence device, a manufacturing method thereof, and a display device. Background technique [0002] Organic Light Emitting Device (OLED) is a new type of photoelectric display and high-efficiency lighting technology. Due to its excellent characteristics such as solid-state light emission, wide viewing angle, low power consumption, fast response speed, and high and low temperature resistance, It is especially suitable for the requirements of low-carbon environmental protection and green life in today's world, and has been widely used in various fields of daily production and life such as flat panel display, solid-state lighting, transparent display, flexible display and lighting. [0003] Compared with red light, green light and blue light OLED devices that are evaporated separately, OLED devices that use white light as a light source require fewer evaporat...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, an OLED device using white light as a light source, using white light as a light source, and matching the transmission spectrum of a color filter layer, achieves the effect of color display by controlling the current of the OLED device, from figure 1 It can be seen that the emission spectra at the corresponding positions of the red sub-pixel, green sub-pixel and blue sub-pixel are exactly the same, and the color gamut cannot be improved

[0005] In summary, the color gamut of OLED devices using white light as a light source in the prior art is relatively low; in addition, due to the serious life attenuation phenomenon of blue light in OLED devices, the red sub-pixels, green sub-pixels and blue sub-pixels of OLED devices The packages are exactly the same, and it is easy to cause the color of the OLED device to turn yellow after aging.

Images