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White organic electroluminescence device based on color conversion and manufacturing method thereof

An electroluminescent device and color conversion technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of different aging rates of luminescent groups, affecting the operating life of devices, and chromaticity shifts, etc., to achieve The effects of chromaticity stability, low cost, and high outcoupling efficiency

Inactive Publication Date: 2012-08-29
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In the previous white organic electroluminescent devices, there is more or less a phenomenon that the chromaticity shifts with the increase of the current density, which may be due to the change of the carrier mobility under different electric fields, The energy distribution or recombination area of ​​different light-emitting layers will also change accordingly, and the aging rate of different luminescent groups is different. As the device ages, the color coordinates of the device will also change, thus affecting the operating life of the device

Method used

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  • White organic electroluminescence device based on color conversion and manufacturing method thereof
  • White organic electroluminescence device based on color conversion and manufacturing method thereof
  • White organic electroluminescence device based on color conversion and manufacturing method thereof

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, example is further described.

[0032] Such as figure 1 As shown, the white organic electroluminescent device in this example has the red fluorescent material MEH-PPV as the color conversion layer, which includes an ITO glass substrate (1), a color conversion injection layer (2), a hole transport layer (3 ), light emitting layer (4), electron transport layer (5), composite cathode layer (6), wherein the color conversion layer is MEH-PPV, and the light emitting layer is made of blue light theme material TBADN doped with 3.0wt% blue light material DSA- Ph, the electron transport layer material is Alq 3 .

[0033] The detailed steps and process of the preparation method of the white organic electroluminescence light-emitting device with the device structure are as follows:

[0034] a. Select an ITO glass substrate (1) that meets the requirements, its effective area is 5mm×5mm, and its surface resistance is 10Ω / □. After sel...

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Abstract

The invention relates to a white organic electroluminescence device realized by adopting a color conversion injection layer and a manufacturing method thereof. The white organic electroluminescence device consists of an indium tin oxide glass substrate (1), the color conversion injection layer (2), a hole transmission layer (3), a luminescent layer (4), an electronic transmission layer (5) and a composite cathode layer (6). The manufacturing method of the device comprises the steps of: preparing the color conversion injection layer (2) on the indium tin oxide glass substrate in a rotary coating manner, and then evaporating the hole transmission layer (3), the luminescent layer (4), the electronic transmission layer (5) and the composite cathode layer (6) in sequence. In the device, the structure is simple, only a single blue-light luminescent material is needed, and the color conversion layer is excited to emit red light, so that white light is realized. The white organic electroluminescence device has the advantages that the chromaticity is stable, the efficiency is high and the cost is low.

Description

technical field [0001] The invention relates to a white organic electroluminescent device with a color conversion injection layer (CC-HIL) and a preparation method thereof. The color conversion layer is prepared by spin coating, and the other layers are prepared by vacuum evaporation. The white organic electroluminescent device with the color conversion layer has stable chromaticity, low cost and high luminous efficiency. Background technique [0002] Organic Light Emitting Device (OLED) is widely used in flat panel displays, backlight modules and lighting due to its characteristics of ultra-thin, high brightness, fast response, low power consumption, high efficiency and simple production. The principle of luminescence is to deposit a very thin organic material between two electrodes, and apply direct current to the organic luminescent material to make it luminous. [0003] In the previous white organic electroluminescent devices, there is more or less a phenomenon that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 朱文清王赛陈雪徐红徐峰王强
Owner SHANGHAI UNIV
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