Organic electroluminescent device and preparation method thereof

An electroluminescent device and electroluminescent technology, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, and electrical components, etc., can solve the problems of reduced luminous efficiency of light-emitting devices, increased operating voltage and decreased stability of light-emitting devices, etc. Improve hole injection efficiency, reduce operating voltage, and increase the effect of logarithm
CN104882545AInactive Publication Date: 2015-09-02OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
OCEANS KING LIGHTING SCI&TECH CO LTD
Publication Date
2015-09-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to an organic electroluminescent device and a preparation method thereof, wherein the organic electroluminescent device has a layered structure and comprises an anode conductive substrate, a first hole injection layer, a first electron injection layer, a second hole injection layer, a hole transport layer, a green light emitting layer, an electron transmission layer, a second electron injection layer and a cathode layer; wherein the anode conductive substrate, the first hole injection layer, the first electron injection layer, the second hole injection layer, the hole transport layer, the green light emitting layer, the electron transmission layer, the second electron injection layer and the cathode layer are successively laminated. The first hole injection layer and the second hole injection layer are made of hole injection material and p-type material which is doped into the hole injection material. The first electron injection layer and the second electron injection layer are made of electron injection material and n-type material which is doped into the electron injection material. According to the organic electroluminescent device, through the added second hole injection layer and the second electron injection layer, working voltage can be reduced and luminous efficiency can be improved effectively.
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Description

technical field

[0001] The invention relates to the field of optoelectronic devices, in particular to an organic electroluminescent device and a preparation method thereof. Background technique

[0002] Organic electroluminescent devices (OLEDs) have some unique advantages: (1) OLEDs are diffuse surface light sources, and do not require an additional light guide system to obtain large-area white light sources like light-emitting diodes (LEDs); (2) Due to the diversity of organic light-emitting materials, OLED lighting can design the required color of light according to needs. At present, both small molecule OLEDs and polymer organic light-emitting diodes (PLEDs) have obtained all colors of light including the white light spectrum. ; (3) OLED can be made on a variety of substrates such as glass, ceramics, metal, plastic and other materials, which makes the design of lighting sources more free; (4) OLED lighting panels can be made in the way of making OLED displays. (5) OLED ...

Claims

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