Ink-jet printing organic electroluminescence display and manufacture method thereof

An inkjet printing and display technology, which is applied in the fields of electrical solid devices, semiconductor/solid device manufacturing, circuits, etc., can solve the problems of difficulty in obtaining uniformity, small surface tension, and easy crystallization and separation, and shorten the fracture length of the liquid column Effect

Active Publication Date: 2014-07-02
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the generally low viscosity and surface tension of small molecule solutions, the droplets ejected by inkjet printing are prone to crystallization and phase separation when they are naturally dried in the pixel pits to form a film, making it difficult to obtain uniform and uniform films. Inkjet printing of these high-performance small molecules The performance of the display screen made of the material is not satisfactory

Method used

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  • Ink-jet printing organic electroluminescence display and manufacture method thereof
  • Ink-jet printing organic electroluminescence display and manufacture method thereof
  • Ink-jet printing organic electroluminescence display and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] select figure 1 The inkjet printing display structure shown uses the patterned ITO transparent conductive glass as the substrate, cleans the surface pollutants with deionized water, blows them dry with high-pressure nitrogen, and uses ultraviolet light to irradiate them for surface modification, and then Prepare the PEDOT:PSS (polyaniline derivative) hole injection layer by spin coating on a 100-class ultra-clean bench, with a thickness of 40-80nm, heat at 200 degrees Celsius for 10 minutes in a nitrogen environment, and place it in a nitrogen glove box after cooling Spin coating PVK (polyvinyl carbazole, structure see figure 2 ) hole transport layer, the solvent is chlorobenzene, and the film thickness is about 40nm. Then spin-coat the blue light buffer layer (buffer layer), that is, the blue light-emitting layer film. The material of the buffer layer is dendritic compound G0 and blue light polyfluorene PFO (see the structure of figure 2 ) blended according to the ...

Embodiment 2

[0029] Repeat Example 1, the ratio used for inkjet printing red luminous solution is G0: Ir(piq) 2 acac:PS=100:10:1 (mass ratio), the ratio used for the green luminescent solution is G0: Ir(mppy) 3 :PS=100:10:1 (mass ratio), other conditions remain unchanged.

Embodiment 3

[0031] Repeat Example 1, the red luminescent solution used for inkjet printing is G0: MEH-PPV=10:1 (mass ratio), the green luminescent solution is G0: P-PPV=10:1 (mass ratio), and other conditions remain unchanged.

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PUM

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Abstract

The invention provides an ink-jet printing organic electroluminescence display and a manufacture method thereof. The display structurally comprises a transparent substrate, a patterned transparent anode layer, a hole injection layer, a hole transmission layer, a light emitting layer and a metal cathode which are stacked in sequence. The light emitting layer comprises soluble small organic molecule and polymer blending materials. Soluble small organic molecule and polymer blend serves as printing solution to prepare the light emitting layer, characteristics of high efficiency and long service life of small organic molecules are given play to, the split-phase crystallization phenomenon caused by the fact that small organic molecule solution dries to form a film is inhibited, the process that the solution in a subpixel dries to form a film naturally can be effectively inhibited under combined action of high boiling point solvent, the uniform light emitting layer film is obtained, and performance of the ink-jet printing display screen is improved effectively. Therefore, a new feasible way is provided for industrialized production of display screen products by means of the ink-jet printing technology.

Description

technical field [0001] The invention relates to the technical field of preparing organic electroluminescence displays by inkjet printing technology, in particular to an inkjet printing organic electroluminescence display and a preparation method thereof. Background technique [0002] After nearly two decades of development, the all-solid-state organic electroluminescent display (OLED), which is characterized by thinness, low power consumption, high response, and high resolution, has temporarily emerged in the field of flat-panel display with liquid crystal display (LCD) as the mainstream. Its potential The market prospect of the industry is optimistic. At present, the OLED products entering the market are all small molecule OLEDs prepared by vacuum evaporation technology. Due to its complex preparation process and high equipment cost, this technology keeps the cost of the product high, and it is difficult to win in the competition with LCD, which has increasingly mature pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/135H10K85/00H10K50/11H10K71/00H10K71/15H10K85/1135H10K85/115H10K85/146H10K85/791H10K50/12
Inventor 彭俊彪刘南柳许伟王坚刘会敏孙圣
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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