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Flexible quanta polymer white light EL part and its making method

A quantum dot polymer and luminescent technology, which is applied in the manufacture of electroluminescent light sources, electric solid devices, semiconductor/solid devices, etc., can solve the problems of high cost, difficult to master, and complicated preparation process, and achieve high contrast and brightness , improved working life and simple preparation process

Inactive Publication Date: 2007-08-01
TIANJIN UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

Although its development is rapid, the problem of full-color display has always been an important factor restricting its industrialization process
[0004] At the same time, most of the traditional methods of obtaining white light in the world are realized through a multi-layer structure, that is, the method of stacking red, green, and blue light-emitting layers, and obtaining white light by mixing the three primary colors. The shortcomings of this method The performance is that the preparation process is complex, difficult to master, and the cost is high, and the white light chromaticity of the device is easy to change with the change of the external driving voltage. In addition, due to the self-absorption of the multi-layer structure, the general quantum efficiency is relatively low.

Method used

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  • Flexible quanta polymer white light EL part and its making method
  • Flexible quanta polymer white light EL part and its making method

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Embodiment 1

[0020] (1) The ITO anode etched into a 5mm*60mm strip-shaped PET substrate was repeatedly cleaned in a detergent, then soaked in isopropanol, acetone and chloroform solutions and ultrasonically cleaned, and finally dried in an infrared oven for use ;

[0021] (2) Dissolve ZnS quantum dots and polymer PPV in a mass ratio of 2:1 in chloroform solution of 1 to 2 mg / ml, and form a film by spin coating; low speed 1100rpm, film formation time 20s, high speed 3000rpm , the film forming time is 30s, and put it in the desiccator for 10 hours after completion;

[0022] (3) Alq3 is pressed into sheets, and a film is formed on the light-emitting layer by vacuum evaporation to form an electron transport layer. The condition is: the degree of vacuum is greater than 8×10 -4 Pa, the evaporation current is about 5A, and the evaporation time is 15 minutes;

[0023] (4) The preparation of the Al cathode adopts the Al wire with a length of about 2 cm on the tungsten alloy furnace wire, and with...

Embodiment 2

[0027] (1) The ITO anode etched into a 5mm*50mm strip-shaped PET substrate was repeatedly cleaned in a detergent, then soaked in isopropanol, acetone and chloroform solutions and ultrasonically cleaned, and finally dried in an infrared oven for use ;

[0028] (2) Dissolve ZnS quantum dots and polymer PPV in a mass ratio of 2:1 in chloroform solution of 1 to 2 mg / ml, and form a film by spin coating method; low speed 1300rpm, film forming time 20s, high speed 3000rpm, film forming time 30s, put it in the desiccator for 8 hours after completion;

[0029] (3) Dissolve PBD in a 1.6mg / ml chloroform solution, and form a film by spin coating; low speed 1000rpm, film formation time 18s, high speed 3000rpm, film formation time 25s, and place it in a desiccator for 6 Hour;

[0030] (4) The preparation of the Al cathode adopts the Al wire with a length of about 2 cm on the tungsten alloy furnace wire, and with the help of a strip mask plate, a thin layer of strip-shaped Al is vacuum-dep...

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Abstract

The invention discloses a flexible quanta point polymer white light electroluminescence component and preparation method, the invention regards blue light ZnS quanta point red light PPV compound as main lightening material, the ITO surface of PET underlay uses circumrotating coating and vacuum evaporating method to produce film with definite thickness, the components as flowing are obtained: ITO/ZnS:PPV(y nm)/Alq3(z nm)/Al(x nm). The component does not need lightening layer which is used to produce three base colors, and fussy photoetching, the craft is easy, the flexibility and repetition are well; when it is combined with microelectronics corrosion color filter film technique which is more mature, the full color display can be obtained.

Description

【Technical field】 [0001] The patent of the present invention relates to a new type of flat panel display device - flexible quantum dot polymer white light electroluminescent device and its preparation method. 【Background technique】 [0002] Flexible electroluminescent display devices use flexible and bendable materials with good light transmittance as substrates instead of glass substrates for ordinary devices. Compared with ordinary electroluminescent devices, they are light, thin, vibration-resistant and impact-resistant. Features. Therefore, as a new type of solid flat and flexible display device, flexible electroluminescent display devices have important application prospects in portable display devices and military fields. Although it develops rapidly, the problem of full-color display has always been an important factor restricting its industrialization process. [0003] Quantum dots are quasi-zero-dimensional nano-semiconductor materials, which are composed of a sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H05B33/14H05B33/10H01L51/50H01L51/56
Inventor 李岚张晓松张艳芳
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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