Light emitting device and manufacturing method thereof

A manufacturing method and technology for light-emitting devices, which are applied to semiconductor devices, electrical components, circuits, etc., can solve the problems of increasing the number of manufacturing processes, declining performance of light-emitting devices, and low product competitiveness, reducing the number of process processes and eliminating solvents. The effect of poor vapor concentration and shortening of the printing process

CN108963046BActive Publication Date: 2020-12-08GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-12-08

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Abstract

The present invention relates to a luminescent device and manufacturing method thereof. The manufacturing method comprises the following steps of: providing a substrate, and forming a first electrodelayer on the substrate; forming a pixel pit on the substrate; forming a luminescent function layer in the pixel pit; forming a second electrode layer on a pixel definition layer and the luminescent function layer, wherein the formation process of at least one layer of the first electrode layer, the second electrode layer and the luminescent function layer comprises the following steps of: performing ink-jet printing, at the same time performing step-by-step vacuum drying processing of ink after printing, performing package and obtaining at least one layer of the first electrode layer, the second electrode layer and the luminescent function layer. The manufacturing method of the luminescent device facilitates improvement of the uniformity of final film formation, greatly shortens the wholeprinting craft process, reduces the craft flow numbers and improves the printing production efficiency.
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Description

technical field

[0001] The invention relates to the field of display devices, in particular to a light emitting device and a manufacturing method thereof. Background technique

[0002] With the gradual development of display technology, light-emitting devices such as OLEDs have attracted the attention of all parties due to their excellent display performance. Conventional evaporation methods to manufacture OLEDs and other light-emitting devices face problems such as low material utilization and the need for ultra-fine masks, resulting in high production costs. In order to further reduce the production cost of OLEDs and other light-emitting devices, printing technology can be used to manufacture OLEDs and other light-emitting devices.

[0003] One of the key problems in the production of OLED and other light-emitting devices by printing technology is the drying and film-forming process after inkjet printing of functional material inks. The drying and film-forming process dir...

Examples

Embodiment 1

[0113] This embodiment provides a method for manufacturing a printed display, which includes the following steps:

[0114] 1) Prepare a pixel defining layer 2 on a patterned anode TFT substrate 1, and form a pixel pit 3.

[0115] 2), please further combine image 3 , using the printing device 10 to ink-jet print functional ink into the pixel pit 3, and perform step-by-step vacuum drying treatment on the printed ink to obtain a pre-dried film.

[0116] 3) heat-treating the pre-dried film to make it completely cross-linked and cured to form a light-emitting functional layer.

[0117] Wherein, the light-emitting functional layer includes a hole injection layer, a hole transport layer, and a light-emitting layer, and the formation process of each layer adopts a step-by-step vacuum drying process while inkjet printing is performed.

[0118] 4), evaporating the electron transport layer and the cathode, and finally packaging, that is.

[0119] This embodiment provides a method for...