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High-colour-purity electroluminescent device and preparing method thereof

An electroluminescent device, color purity technology, applied in the direction of electroluminescent light source, electric light source, electrical components, etc., can solve the problems of large loss of light energy, loss, etc., and achieve the effect of low cost and simple technical method

Inactive Publication Date: 2004-09-15
GUANG ZHOU NEW VISION OPTO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this method is that the output light energy of the polymer luminescence is greatly lost after being filtered, at least 50%

Method used

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  • High-colour-purity electroluminescent device and preparing method thereof
  • High-colour-purity electroluminescent device and preparing method thereof
  • High-colour-purity electroluminescent device and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] One of the best implementation modes of the present invention is to adopt ITO transparent conductive glass as substrate, prepare PEDOT (polyaniline derivative) hole transport layer (thickness 70nm) with spin coating method, heat 70 ℃ in vacuum oven, 2 Hours. Select high luminous efficiency and have hole-transporting red (polyphenylene vinylene derivative MEHPPV) and green (polyphenylene vinylene derivative P-PPV) luminescent polymer materials to blend in a certain proportion (molecular structure see Figure 7), the molar mixing ratio is MEHPPV: P-PPV=4: 96, the mixed polymer material is dissolved in toluene solvent, the solution concentration is 1mol / ml, and it is 70-100nm to make thickness on the PEDOT film with spin coating method uniform film. Metal electrodes with low work function (Ca-4nm / Al-200nm two metals) are vacuum-deposited on the blended light-emitting polymer film. On the basis of the film preparation, the packaging box made by etching the glass plate is u...

Embodiment 2

[0047] Two of the best implementation modes of the present invention is to adopt ITO transparent conductive glass as substrate, prepare PEDOT (polyaniline derivative) hole transport layer (thickness 70nm) with spin coating method, heat 70 ℃ in vacuum oven, 2 Hours. Select high luminous efficiency and have hole transport red (polyphenylene vinylene derivative MEHPPV), green (polyphenylene vinylene derivative P-PPV) and blue (polyfluorene PF) luminous polymer materials (molecular The structural formula is shown in Figure 7), the polymer materials are blended in a certain proportion, the molar mixing ratio MEHPPV: P-PPV: PF=4: 48: 48, the mixed polymer materials are dissolved in toluene solvent, and the solution concentration is 1mol / ml. A homogeneous blended polymer film with a thickness of 70-100nm was prepared on the PEDOT film by spin coating. Metal electrodes with low work function (Ca-4nm / Al-200nm two metals) were vacuum-deposited on the blended light-emitting polymer film...

Embodiment 3

[0052] The third of the best implementation mode of the present invention is to adopt ITO transparent conductive glass as substrate, prepare PEDOT (polyaniline derivative) hole transport layer (thickness 70nm) with spin coating method, heat 70 ℃ in vacuum oven, 2 Hours. Select polymers with high luminous efficiency and hole-transporting red (polyphenylene vinylene derivative: MEHPPV), green (polyphenylene vinylene derivative: P-PPV) and blue (polyfluorene: PF) emission colors Materials, MEHPPV, P-PPV and PF were dissolved in toluene solvent to make 0.5mol / ml, 1mol / ml and 2mol / ml toluene solutions respectively, and the three polymer uniform films were prepared by spin coating method. A single green (P-PPV) luminescent film (thickness 60nm), a single red (MEH-PPV) luminescent film (thickness 50nm) and a single blue (PF) luminescent film (thickness 60nm) were fabricated sequentially on the PEDOT polymer film. Metal electrodes with low work function (Ca-4nm / Al-200nm two metals) a...

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Abstract

The invented film in composed of cascading transparent substrate, transparent electrode, hole transport layer, crossblend luminescence film layer or multiplayer macromolecule film and metal electrode film in sequence. Narrowed luminescence spectrum of macromolecule is realized in the invention through changing coupling between luminescence macromolecule chains, adjusting and controlling transport process of electron carrier and hole carrier as well as using energy transferring mechanism between molecules that is excitation energy of macromolecule luminescence material with wide forbidden band is easier to transfer to luminescence material with narrow forbidden band. Advantages of the invented film are: ultrathin, stable, saturated luminescence chroma, simple technique, and low cost. The device is suitable to preparation of color screen.

Description

technical field [0001] The invention relates to the luminous chromaticity of self-luminous flat-panel displays. Chromaticity is a quantitative representation of color. High color purity means that the energy distribution of luminous photons is relatively narrow. degree requirements. In more detail, the invention relates to an electroluminescent device with narrow emission spectrum band and high color purity, which adopts polymer luminescent material blend and multi-layer thin film. [0002] The invention also relates to a method for preparing the electroluminescent device. Background technique [0003] The phenomenon that electroluminescent devices constructed of polymer films can obtain bright light in various colors under low voltage drive has begun to be applied to various types of flat panel displays, such as mobile phones, PDAs, digital cameras, computer display terminals, TVs and various A variety of instrumentation displays, etc. As a polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/10H05B33/14H05B33/26
Inventor 彭俊彪曹镛莫越奇杨伟章勇
Owner GUANG ZHOU NEW VISION OPTO ELECTRONICS TECH