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Inverted organic light emitting diode display device and manufacturing method thereof

A technology for light-emitting diodes and display devices, which is applied in the manufacture of semiconductor/solid-state devices, electric solid-state devices, semiconductor devices, etc., can solve the problems of many defect states, low mobility, and low mobility of electron transport layers, and can reduce the driving voltage. , The effect of enhancing the transmission speed and improving the efficiency

Active Publication Date: 2016-02-03
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this way, the transport speed of holes is sacrificed to balance the transport of electrons, and it does not make all organic materials play the best conduction effect.
The mobility of the electron transport layer of this structure is low, and it will also limit the high-speed transport of the hole transport layer.
Moreover, such a preparation sequence also makes it impossible to transform the ETL layer into a polycrystalline state alone, because the high temperature during the transformation will destroy other layers below.
[0004] The reason for the low mobility of organic materials is mainly related to the crystal morphology of organic materials. The crystal arrangement of amorphous thin films is relatively disordered, and there are many defect states, which hinder the carrier transport speed.

Method used

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  • Inverted organic light emitting diode display device and manufacturing method thereof
  • Inverted organic light emitting diode display device and manufacturing method thereof
  • Inverted organic light emitting diode display device and manufacturing method thereof

Examples

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no. 1 example

[0072] figure 2 A schematic structural diagram of an inverted organic light emitting diode display device according to the present invention is shown according to the first embodiment of the present invention. Such as figure 2 As shown, the inverted OLED display device of the present invention includes: a substrate 1 , a cathode 2 , an electron transport layer 3 , a light emitting layer 4 , a hole transport layer 5 , a hole injection layer 6 and an anode 7 . The cathode 2 is provided on the substrate 1 . Anode 7 is separated from cathode 2 . At least one luminescent layer 4 is disposed between the cathode 2 and the anode 7 . An electron-transport layer 3 is arranged between the cathode 2 and one or more light-emitting layers 4 . The hole-transport layer 5 is arranged between the anode 7 and the one or more light-emitting layers 4 . The hole injection layer 6 is provided between the hole transport layer 5 and the anode 7 . Wherein, the electron transport layer 3 is poly...

Embodiment 1

[0100] Sputtering of ITO1500A on a glass substrate serves as the cathode of the OLED.

[0101] Under the condition of the substrate temperature of 150 degrees, and the deposition thickness of 400A of F 16 CuPc acts as an electron transport layer.

[0102] The temperature of the substrate is cooled to 50 degrees, and then a light-emitting layer (main material: BCP, doped: TBPe) is deposited, and the thickness of the light-emitting layer is 500nm.

[0103] Next, NPB was deposited to act as a hole transport layer with a thickness of 350 Å.

[0104] Then deposit 10A of MoO 3 Acts as a hole injection layer.

[0105] The last deposited 1500A of Al served as the OLED anode.

[0106] The preparation method of the present invention improves the film-forming quality of the electron transport material through a special process, increases its mobility level, and makes the electron mobility equal to or higher than that of the hole transport material. And the inverted structure is adop...

no. 2 example

[0108] Figure 4 A schematic structural diagram of an inverted organic light emitting diode display device according to the present invention is shown according to the second embodiment of the present invention. Such as Figure 4 As shown, the inverted OLED display device of the present invention includes: a substrate 1 , a cathode 2 , an electron transport layer 3 , a light emitting layer 4 , a hole transport layer 5 , a hole injection layer 6 and an anode 7 . The cathode 2 is provided on the substrate 1 . Anode 7 is separated from cathode 2 . At least one luminescent layer 4 is disposed between the cathode 2 and the anode 7 . An electron-transport layer 3 is arranged between the cathode 2 and one or more light-emitting layers 4 . The hole-transport layer 5 is arranged between the anode 7 and the one or more light-emitting layers 4 . The hole injection layer 6 is provided between the hole transport layer 5 and the anode 7 . Wherein, the electron transport layer 3 is pol...

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Abstract

The invention provides an inversion type organic light emitting diode display device and a manufacturing method thereof. The manufacturing method comprises the steps that a substrate is provided, and a layer of conductive material is sputtered on the substrate to serve as a negative electrode; an electron transmission layer is formed on the negative electrode and is in a pleomorphic state; a light emitting layer is formed on the electronic transmission layer and is in an amorphous state; a hole transmission layer is formed on the light emitting layer through vacuum evaporation and is in an amorphous state; a hole injection layer is formed on the hole transmission layer through vacuum evaporation and is in an amorphous state; the negative electrode is deposited on the hole injection layer through the vacuum evaporation or sputtering. Transmission speed of the inversion type organic light emitting diode display device can be greatly enhanced, a positive electrode and the barrier of the hole injection layer can be optimized, high-speed transmission can be achieved for electrons and holes, efficiency can be improved, and driving voltage can be reduced.

Description

technical field [0001] The invention relates to an organic light emitting diode display device, especially an inverted organic light emitting diode display device and a preparation method thereof. Background technique [0002] Organic Light Emitting Diodes (OLEDs) are currently being used in areas such as display and lighting. OLED can provide R, G, B three-color active light emission, full-color display can be realized without adding filters, and high light utilization rate can be obtained, and AMOLED has high contrast, wide viewing angle, low power consumption, thinner, etc. Advantages, become a strong competitor of AMLCD technology, AMOLED is expected to become the mainstream technology of the next generation of flat panel display. [0003] figure 1 A schematic structural view of an organic light emitting diode display device in the prior art is shown. Such as figure 1 As shown, the organic light emitting diode display device includes substrate 1, anode 7, hole inject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 洪飞
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD