Hemispherical shell organic electroluminescence device with two luminescent layers and preparation method for device

A hemispherical shell, dual emission technology, applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc., can solve problems such as hindering the application of phosphorescent OLED devices, annihilation, etc., to widen the collision recombination area, reduce the startup voltage, reduce Annihilation effect

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  • Abstract
  • Description
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Problems solved by technology

Due to the relatively short carrier lifetime of triplet excitons, at high driving voltage, due to the relatively high concentration of carriers, it is easy to cause triplet-triplet annihilation
Therefore, when increasing the driving voltage of the phosphorescent OLED device, there will be a maximum value and then a sharp drop, which hinders the practical application of the phosphorescent OLED device.

Method used

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  • Hemispherical shell organic electroluminescence device with two luminescent layers and preparation method for device
  • Hemispherical shell organic electroluminescence device with two luminescent layers and preparation method for device
  • Hemispherical shell organic electroluminescence device with two luminescent layers and preparation method for device

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preparation example Construction

[0047] The preparation method of the above-mentioned double-emitting layer hemispherical shell-shaped organic electroluminescent device, such as figure 2 shown, including the following steps:

[0048] S1. The hemispherical substrate (eg, glass) is ultrasonically cleaned with purified water, acetone, ethanol, etc. for 15 minutes in sequence, and dried after cleaning;

[0049] S2. Using a magnetron sputtering process, the hemispherical shell-shaped substrate is placed in a vacuum chamber of a magnetron sputtering device, and an anode layer is sputtered on the inner surface of the hemispherical shell-shaped substrate; the hemispherical shell-shaped anode substrate is obtained, Subsequently, the anode layer was treated with oxygen plasma with a power of 10W for 15min;

[0050] S3. Put the hemispherical shell-shaped anode substrate into the organic vacuum chamber of the evaporation equipment, and sequentially evaporate the p-type doped hole transport layer, light-emitting layer, ...

Embodiment 1

[0056] The structure of the hemispherical organic electroluminescence device of the present embodiment is: glass / ITO / m-MTDATA:F4-TCNQ / TAPC / (TCTA:TPBi):Firpic:Ir(MDQ) 2 (acac) / (TCTA:TPBi):Ir(ppy) 3 :Ir(MDQ) 2 (acac) / Bphen / Bphen:Cs 2 CO 3 / Mg:Ag.

[0057] The preparation steps of the hemispherical shell-shaped organic electroluminescent device with double emission layers in this embodiment are as follows:

[0058] 1. Clean the hemispherical glass substrate with an inner diameter of 5mm and a thickness of 2mm with pure water, acetone, ethanol, etc. for 15 minutes, and then dry it;

[0059] 2. Put the hemispherical glass substrate into the organic vacuum chamber of the magnetron sputtering equipment, sputter a layer of 150nm thick ITO anode layer; then spin-coat the glass coated with the ITO anode layer with photoresist, expose and develop , Aqua regia etching, etch into the required pattern and size, then clean the etched conductive glass, and then use pure water, acetone, e...

Embodiment 2

[0064] The structure of the hemispherical shell-shaped organic electroluminescent device with double emission layers of the present embodiment is:

[0065] Glass / FTO / TPD:TCNQ / TPD / (TCTA:TPBi):FIr6:Ir(MDQ) 2 (acac) / (TCTA:TPBi):Ir(ppy) 3 :Ir(MDQ) 2 (acac) / PBD / PBD:LiF / Ag.

[0066] The preparation steps of the hemispherical shell-shaped organic electroluminescent device with double emission layers in this embodiment are as follows:

[0067] 1. The hemispherical glass substrate with an inner diameter of 5 mm and a thickness of 4 mm was ultrasonically cleaned with purified water, acetone, ethanol, etc. for 15 minutes, cleaned and dried;

[0068] 2. Put the hemispherical glass substrate into the organic vacuum chamber of the magnetron sputtering equipment, sputter a layer of FTO anode layer with a thickness of 180nm; then spin-coat the glass coated with the FTO anode layer with photoresist, expose and develop , Aqua regia etching, etch into the required pattern and size, then clea...

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Abstract

The invention belongs to the field of photoelectric devices, and discloses a hemispherical shell organic electroluminescence device with two luminescent layers and a preparation method for the device. The hemispherical shell organic electroluminescence device with the two luminescent layers comprises a hemispherical shell base, wherein an anode layer, a p-type doped hole transport layer, an electron blocking layer, a blue luminescent layer, a green luminescent layer, a hole blocking layer, an n-type doped electron transport layer and a cathode layer are stacked on the internal surface of the hemispherical shell base in sequence. The hemispherical shell organic electroluminescence device is provided with the two luminescent layers with a subject and object doped structure, and a subject material is a bipolar subject material or a mixed material of hole transport and electron transport subject materials, so that the impact recombination zone of excitons can be expanded, triplet-triplet annihilation is avoided, and the starting voltage of the organic electroluminescence device is reduced.

Description

technical field [0001] The invention relates to the field of photoelectric devices, in particular to a hemispherical shell-shaped organic electroluminescent device with double emission layers and a preparation method thereof. Background technique [0002] In 1987, Tang and VanSlyke of Eastman Kodak Company in the United States reported a breakthrough in the research of organic electroluminescence. For the first time, they used the vacuum evaporation technology to combine the aromatic diamine with hole transport property and the 8-hydroxyquinoline aluminum (Alq) with high fluorescence efficiency and electron transport property. 3 ) combined to prepare a double-layer organic electroluminescent device. Under the driving voltage of 10V, the device emits green light with a brightness of up to 1000cd / m 2 , the efficiency reaches 1.5lm / W, and the life span exceeds 1000 hours. This milestone work has made people see a bright prospect for the practical and commercialization of org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56C09K11/06
Inventor 周明杰王平
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