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Organic electroluminescence device with high electronic filling efficiency and preparation method of organic electroluminescence device

An electroluminescent device and injection efficiency technology, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve problems such as shortening the life of the device, improve luminous efficiency, improve electron transmission capacity, and improve electron injection. The effect of efficiency

Inactive Publication Date: 2015-04-22
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

shorten the lifetime of the device

Method used

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  • Organic electroluminescence device with high electronic filling efficiency and preparation method of organic electroluminescence device
  • Organic electroluminescence device with high electronic filling efficiency and preparation method of organic electroluminescence device

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Embodiment Construction

[0018] The present invention is described in further detail below in conjunction with accompanying drawing:

[0019] see figure 1 , the present invention includes a glass substrate 10, and an anode 9, a hole injection layer 8, a hole transport layer 7, a light emitting layer 6, an electron transport layer, an electron injection layer 2 and a cathode stacked sequentially on the glass substrate 10 from bottom to top 1; the electron transport layer is divided into an upper electron transport layer 3 and a lower electron transport layer 5, and between the upper electron transport layer 3 and the lower electron transport layer 5, Al with a grid structure of 3 to 5 nm in thickness is arranged The membrane electrode layer 4, the upper electron transport layer 3 and the lower electron transport layer 5 adopt the same organic material, and the thickness of the upper electron transport layer 3 is 4 to 5 times that of the lower electron transport layer 5, see figure 2 , the Al film ele...

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Abstract

The invention relates to an organic electroluminescence device with high electronic filling efficiency and a preparation method of the organic electroluminescence device. The organic electroluminescence device comprises a glass base plate, an anode, a hole filling layer, a hole transmitting layer, a luminescence layer, an electronic transmitting layer, an electronic filling layer and a cathode, wherein the anode, the hole filling layer, the hole transmitting layer, the luminescence layer, the electronic transmitting layer, the electronic filling layer and the cathode are sequentially stacked on the glass base plate from bottom to top, the electronic transmitting layer is divided into an upper electronic transmitting layer and a lower electronic transmitting layer, an Al membrane electrode layer with a lattice structure is arranged between the upper electronic transmitting layer and the lower electronic transmitting layer, voltage U1 is connected in parallel between the cathode and the Al membrane electrode layer with the lattice structure, and voltage U2 is connected in parallel between the anode and the Al membrane electrode layer with the lattice structure. Through the addition of the Al membrane electrode layer with the lattice structure, the electronic filling efficiency and the luminescence efficiency of the organic electroluminescence device can be effectively improved. Because the Al membrane electrode layer with the lattice structure is in a hollow structure, the electronic transmitting layer is still a whole, the interface potential barrier cannot be increased, and in addition, the voltage exerted on the electronic transmitting layer can be changed. The electronic transmitting capability is enhanced for reaching the current carrier filling balance.

Description

technical field [0001] The invention belongs to the field of flat panel display, and relates to a light-emitting device and a preparation method thereof, in particular to an organic electroluminescent device with high electron injection efficiency and a preparation method thereof. Background technique [0002] The organic electroluminescent display device is a carrier double-injection device. Under the action of an electric field, holes are emitted from the anode and electrons are emitted from the cathode. The electrons and holes are injected into the organic material, transported in the organic material, and further migrated. In the light-emitting layer, in the light-emitting layer, electrons and holes form excitons due to Coulomb interaction, and the excitons have high energy and are in an unstable state, and light energy is released when the excitons are de-excited. Therefore, in order to improve the luminous efficiency of the device, it is necessary to increase the forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
Inventor 袁桃利牟强张方辉马颖
Owner SHAANXI UNIV OF SCI & TECH
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