OLED light emitting device, display panel and display apparatus

Abstract

The invention discloses an OLED light emitting device, a display panel and a display apparatus, and aims to lower the working voltage of the OLED light emitting device and improve the efficiency of the OLED light emitting device. The OLED light emitting device comprises a first electrode, a first light emitting layer, a first charge generation layer, a second light emitting layer, a second chargegeneration layer, a third light emitting layer and a second electrode which are arranged on a transparent substrate in sequence; each of the first charge generation layer and the second charge generation layer comprises an n-doped semiconductor film layer and a p-doped semiconductor film layer separately, wherein a Yb metal element is doped in the n-doped semiconductor film layers of the first charge generation layer and the second charge generation layer separately; the Yb metal element in the first charge generation layer accounts for A% based on volume percentage; the Yb metal element in the second charge generation layer accounts for B% based on volume percentage; and A is greater than B, wherein A and B are both positive numbers.

Description

technical field [0001] The invention relates to the technical field of OLED display, in particular to an OLED light-emitting device, a display panel and a display device. Background technique [0002] Organic light-emitting diode (OLED) display technology is widely used in mobile phones, digital cameras, DVD players, personal digital assistants (PDAs), notebook computers, car audio, and televisions. OLED displays are thin and light, and they don't use a backlight, making them widely used. [0003] see figure 1 , generally, an OLED light-emitting device includes: a transparent substrate 01, an anode 02 disposed on the transparent substrate 01, a hole injection layer (HIL) 03, a hole transport layer (HTL) 04, a white organic light-emitting layer 05, an electron transport layer Layer (ETL) 06, Electron Injection Layer (EIL) 07 and Cathode 08. It can be seen that the structure of the OLED device can form an energy level state in the form of a ladder, so that the holes and ele...

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Problems solved by technology

[0004] However, because the electron conduction rate of organic materials in OLED light-emitting devices is much lower than the hole conduction rate, this leads to an imbalance in the number of electrons and holes in the light-emitting region, which limits the improvement of exciton recombination efficiency, making the fabricated device The efficiency is still low, and the driving voltage is high

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