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Organic light-emitting device and fabrication method thereof

A technology of organic light-emitting devices and pixel electrode layers, which is applied in the manufacture of semiconductor/solid-state devices, electric solid-state devices, semiconductor devices, etc., and can solve the problems of uneven film surface and uneven luminous brightness of the pixel layer 93

Active Publication Date: 2019-07-30
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Application Information

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Problems solved by technology

But because the pixel ink 92 of inkjet printing is in the drying film-forming process, the volatilization and drying speed of the edge part of the pixel ink 92 is faster than the middle part of the pixel ink 92, thereby causing the two sides of the film surface to be high and the middle to be low, causing the pixel layer 93 film surface to be uneven. Uniformity, known as the coffee-ring effect (coffee-ring effect), will result in uneven final luminous brightness

Method used

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  • Organic light-emitting device and fabrication method thereof
  • Organic light-emitting device and fabrication method thereof
  • Organic light-emitting device and fabrication method thereof

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Embodiment Construction

[0030] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature...

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Abstract

The invention provides an organic light-emitting device and a fabrication method thereof. The organic light-emitting device comprises a thin film transistor substrate, a pixel electrode layer, a pixeldefining layer and a pixel layer in sequence from bottom to top, the pixel layer sprays pixel ink on the pixel electrode layer in a pixel defining groove through an ink-jet printing mode for film formation through drying, and the pixel ink contains a hydrophobic solvent and is hydrophobic. The fabrication method of the organic light-emitting device includes following steps: providing the thin film transistor substrate, fabricating the pixel electrode layer, fabricating the pixel defining layer, and fabricating the pixel layer. According to the organic light-emitting device and the fabricationmethod thereof, the hydrophobic solvent is added to the pixel ink, the pixel ink is hydrophobic, a coffee ring effect in an ink-jet printing process can be solved, the film surface of the pixel layeris uniform, and the light-emitting performance is improved.

Description

technical field [0001] The invention relates to the display field, in particular to an organic light-emitting device and a manufacturing method thereof. Background technique [0002] Organic light emitting devices (Organic Light Emitting Diode, OLED) have been widely used in the fields of display, lighting, and smart wear due to their good self-luminous characteristics, high contrast, and fast response. [0003] At present, there are two key factors restricting the mass production of inkjet printing (IJP) organic light-emitting devices. One is the performance of the device, that is, the difficult problem of uniformity of light emission. Another is the lifetime of the organic light emitting device. Among them, the uniformity of light emission is determined by the film-forming characteristics of the pixel layer between the retaining wall structure (Bank). The film surface is uniform and the film layers are in good contact, so the light is uniform and the brightness performanc...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L51/56H01L21/77C09D11/033
CPCC09D11/033H10K71/135H10K59/122H10K59/1201
Inventor 毕研亮
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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