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Organic electroluminescent device, preparation method thereof and display device

An electroluminescence device and electroluminescence technology, which are applied in the directions of organic light-emitting devices, organic light-emitting device parameters, organic semiconductor devices, etc., can solve the problems of reduced luminous efficiency and lifespan of light-emitting devices, different numbers of electrons and holes, etc. The effect of improving luminous efficiency and lifespan

Active Publication Date: 2016-01-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors have found that there are at least the following problems in the prior art: since electrons and holes have different injection rates, that is, the electron injection rate is greater than the hole injection rate, the number of electrons and holes injected into the recombination region of the light-emitting layer will be different, As a result, the luminous efficiency and lifetime of organic electroluminescent devices are reduced

Method used

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  • Organic electroluminescent device, preparation method thereof and display device
  • Organic electroluminescent device, preparation method thereof and display device
  • Organic electroluminescent device, preparation method thereof and display device

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Embodiment 1

[0065] This embodiment provides an organic electroluminescence device, an anode layer, a cathode layer, and a light-emitting layer disposed between the anode layer and the cathode layer; wherein, between at least one of the anode layer and the cathode layer and the light-emitting layer There is a carrier rate adjustment layer; the carrier rate adjustment layer is used to adjust the injection rate of carriers.

[0066] When driving organic electroluminescent devices to emit light, the injection rate of holes injected into the light-emitting layer from the anode layer is different from that of electrons injected into the light-emitting layer from the cathode layer, that is, the hole injection rate is less than the electron injection rate, which will cause the injection to emit light at the same time. The number of electrons and the number of holes in the layer recombination zone are different, which leads to a decrease in the luminous efficiency and lifetime of the organic electrolu...

Embodiment 2

[0068] Such as figure 1 As shown, this embodiment provides an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device includes an anode layer 1, a light-emitting layer 3, a carrier rate adjustment layer 10, and a cathode layer 2. Wherein, the carrier rate adjustment layer 10 in this embodiment at least includes an electron rate adjustment layer 4'; the electron rate adjustment layer 4'includes a plurality of continuously arranged electron trap units 40, and the electron trap unit 40 includes an edge deviation The electron injection layer 42 and the deceleration layer 41 are sequentially arranged in the direction of the cathode layer; the electron injection layer 42 is used to inject electrons into the deceleration layer 41; the deceleration layer 41 is used to slow down the electron injection rate.

[0069] In other words, when the organic electroluminescent device is applied with an external voltage, the electrons injected from th...

Embodiment 3

[0095] Such as figure 2 As shown, this embodiment provides an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device includes a substrate, an anode layer 1, a carrier rate adjusting layer 10, and a light emitting layer 3 sequentially disposed on the substrate. And the cathode layer 2. Wherein, the carrier rate adjustment layer 10 in this embodiment includes a hole rate adjustment layer 6'; the hole rate adjustment layer 6'includes a plurality of continuously arranged hole acceleration units 60; each hole acceleration unit 60 It includes a hole injection layer 61 and an acceleration layer 62 that are arranged in a direction away from the anode layer 1; wherein the hole injection layer 61 is used to inject holes into the acceleration layer 62; the acceleration layer 62 is used to increase holes Injection rate.

[0096] In this embodiment, since a carrier rate adjustment layer 10 is added between the anode layer 1 and the light-em...

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Abstract

The invention provides an organic electroluminescent device, a preparation method thereof and a display device, belongs to the field of display technology, and can solve the problems that a present organic electroluminescent device is low in luminescence efficiency and short in service life due to different injection rates of electrons and cavities. The organic electroluminescent device comprises an anode layer, a cathode layer and a luminescent layer between the anode layer and the cathode layer; and the organic electroluminescent device also comprises a carrier rate adjusting layer, and the carrier rate adjusting layer is arranged between the cathode and / or anode layer and the luminescent layer, and is used to adjust the injection rate of carriers.

Description

Technical field [0001] The invention belongs to the field of display technology, and specifically relates to an organic electroluminescence device, a preparation method thereof, and a display device. Background technique [0002] OLED (Organic Light-Emitting Device: Organic Light-Emitting Device, referred to as OLED) is a light-emitting device that uses organic solid-state semiconductors as light-emitting materials. Because of its simple manufacturing process, low cost, low power consumption, high luminous brightness, and operating temperature range Wide advantages, so that it has broad application prospects. [0003] The structure of the existing OLED usually includes an anode layer, a cathode layer, and an organic functional layer disposed between the anode layer and the cathode layer. The organic functional layer includes a hole injection layer and a hole transport layer along the anode layer toward the cathode layer. , Light-emitting layer, electron transport layer, and electr...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/56
CPCH10K50/171H10K50/85H10K50/16H10K2101/40H10K50/156H10K2102/351H10K50/15H10K50/17H10K85/1135H10K50/166H10K50/00H10K50/81H10K50/82H10K71/00H10K85/60H10K85/631H10K85/654H10K85/6565H10K85/6572H10K2101/00H10K2102/00
Inventor 吴海东赖韦霖陈凯白娟娟马文昱
Owner BOE TECH GRP CO LTD
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