High-quality full-color OLED display device with overlapping structure carrier conduction characteristic and preparation process of high-quality full-color OLED display device

Abstract

The invention relates to a full-color OLED display which comprises a driving unit used for driving an OLED light-emitting device to emit light, an OLED light-emitting device layer and a substrate layer. The OLED light-emitting device layer comprises a hole injection layer with an overlapping structure conduction characteristic, and the hole injection layer comprises two types of hole conduction film layers, namely at least one P-doped hole conduction film layer and at least one P-free doped hole conduction film layer; and the two hole conduction film layers are sequentially distributed in an overlapping manner. The full-color OLED display manufactured by adopting the technology has the advantages of good visual effect, high device performance, high color contrast and the like, the Cross-talk problem of the display is effectively solved, a recombination region of carriers is adjusted, and the device performance of the display is improved.

Description

technical field [0001] The invention relates to the technical field of display production and manufacturing, in particular to a full-color OLED light-emitting device containing a hole injection layer with an overlapping structure. Background technique [0002] With the continuous development and progress of OLED technology, OLED display technology has been widely used in mobile phones, TVs, and computers. Compared with inorganic electroluminescent devices, organic electroluminescent devices have a wide range of material selection, can realize full-color display from blue light region to red light region, low driving voltage, high luminous brightness and luminous efficiency, wide viewing angle, and fast response speed. Fast, and easy to realize many advantages such as large area and flexible display, so it has developed rapidly in the past few years. At present, the research in the field of organic electroluminescent display devices is no longer limited to academia. Almost a...

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Problems solved by technology

[0008] This method is to conduct a large number of cross experiments on materials with different functional layers, and then screen the experimental results; in reality, the types of functional layer materials available for mass production are limited, and at the same time, there are long experimental periods, high costs, and poor experimental results. Unable to guarantee and other uncertain factors, the operability is very poor

[0009] In addition to the Cross talk problem, OLED devices also have the problem that the hole injection and transport rate do not match the electron injection and transport rate, resulting in a large shift in the recombination area, which is not conducive to the stability of the device

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