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Method for making white-light organic light-emitting-diode

A light-emitting diode, organic technology, applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve the problems of affecting the color of light emission, white light color impurity, etc., and achieve the effect of high brightness and luminous efficiency

Inactive Publication Date: 2009-01-21
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology

However, the white light device prepared by this method will produce chromaticity changes with the driving voltage and the occurrence of dye molecules Disadvantages such as energy transfer that affects the color of the light
The advantage of obtaining white light based on the generation of exciplexes or electroexcited complexes is that less luminescent materials are used. Generally, only two luminescent materials are needed (only one material is required for electroexcited complexes). However, the color of white light obtained by this method is generally impure.

Method used

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  • Method for making white-light organic light-emitting-diode
  • Method for making white-light organic light-emitting-diode
  • Method for making white-light organic light-emitting-diode

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Embodiment 1

[0049] Organic semiconductor materials for preparing white light OLEDs: the hole transport and luminescent materials are TADPF, TANPF, or TAKF, and their structural formulas are shown in formula 1, formula 2, and formula 3, respectively

[0050]

[0051] Formula 1 Formula 2 Formula 3;

[0052] They can generate electro-excited associations under an electric field, and their synthesis can be found in the literature (K.F.Shao, Y.F.Li, L.M.Yang, Chem.Lett.2005, 34, 1604); the electron transport and light-emitting material is Zn (BTZ) 2 ; The hole-blocking material is TNS; the electron-transporting material is Alq 3 .

[0053] The anode used in the device is ITO, and the cathode is lithium fluoride (LiF) / aluminum (Al), but the cathode is not limited to this, and it can also be lithium, calcium, barium, magnesium, silver, aluminum and other metals.

[0054] Implementation steps:

[0055] The first step: cleaning of ITO glass

[0056]The ITO glass was washed with det...

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Abstract

The method includes steps of vacuum depositing following layer by layer: (1) vacuum depositing a layer of material for holes transport and luminescence capable of generating electricity excitated association object; (2) vacuum depositing a layer of material for electrons transport and luminescence; (3) vacuum depositing a layer of cavity barrier material and a layer of electrons transport material; (4) vacuum depositing a layer of cathode. The disclosed white light OLED possesses features: quite pure chroma, color coordinate closed to pure white light, higher brightness, and luminous efficiency, and suitable color temperature for requirement of illumination. Selecting suitable material for super thin electrons transport and luminescence, the invention adjusts color of luminescence so as to obtain pure white light.

Description

technical field [0001] The invention relates to a preparation method of a white light organic light emitting diode, in particular to a preparation method of a white light organic light emitting diode based on an electromer. Background technique [0002] Organic Light Emitting Diodes (OLEDs) have made considerable progress since they were reported in 1987 (C.W. Tang, S.A. VanSlyke, Appl. Phys. Lett. 1987, 51, 913) due to their potential applications in display and lighting . In recent years, white light OLED has aroused great interest because of its low energy consumption, low cost, large area and other advantages, so it can be used as a flat-panel lighting source, and can also be used as a background light source for liquid crystal displays. At present, there are two main methods for preparing white light OLEDs: (1) mixing fluorescent or phosphorescent materials of different colors to obtain white light (M. O. Appl.Phys.Lett.1996, 68, 147; X.Gong, W.Ma, J.C.Ostrowski, A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56H01L51/54
Inventor 于贵徐新军刘云圻邵科峰狄重安杨联明朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI
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