Organic electroluminescent device, display panel and display device

Abstract

The invention discloses an organic electroluminescent device, a display panel and a display device. The proportion of an electronic material close to a cathode layer in a luminescent composite structure of the organic electroluminescent device is larger than that of a hole type material, the proportion of the hole type material close to the anode layer in the luminescent composite structure is larger than that of the electronic material, when a light-emitting layer emits light, electrons in the cathode layer can be easily transmitted to the side, close to the cathode layer, of the luminescentcomposite structure and holes in the anode layer can be easily transmitted to the side, close to the anode layer, of the luminescent composite structure, thereby ensuring that the recombination position of the electrons and the holes is controlled in the luminescent composite structure, avoiding quenching caused by the diffusion of the electrons and the hole to other layers, reducing the probability that the recombination position of the electrons and the holes deviates to the interface of a barrier layer, reducing the risk of degradation at the interface of the barrier layer and improving thebalance capability of current carriers in the organic electroluminescent device, and therefore, the luminance attenuation is reduced, and the current efficiency is improved.

Description

Technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent device, a display panel and a display device. Background technique [0002] Organic light emitting diodes (Organic Light Emitting Diode, OLED) are highly valued in the field of flat panel display and lighting due to their advantages of high brightness, saturated color, thinness, and flexibility. [0003] In the structure of an organic electroluminescence device, electrons and holes are injected from the cathode and the anode, respectively, and emit light in the light-emitting layer of the device. Therefore, the number of electrons and holes transported to the light-emitting layer plays an important role in the performance of the organic electroluminescent device. At present, there are some technical problems in the structure of organic electroluminescent devices. For example, due to the difference in the transport characteristics of electrons and holes in...

AI Technical Summary

Problems solved by technology

At present, there are some technical problems in the structure of organic electroluminescent devices. For example, due to the difference in the transport characteristics of electrons and holes in the light-emitting layer, the recombination center of electrons and holes will deviate from the center of the light-emitting layer.

When the electron and hole recombination centers are close to the interface of the electron blocking layer or the hole blocking layer, interface aging is more likely to occur at the interface, resulting in problems such as brightness attenuation and low current efficiency of organic electroluminescent devices.

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