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A kind of organic electroluminescence device and preparation method thereof

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of unfavorable mass production, complex process, increase the number of times of evaporation alignment, etc., to improve the quality The effect of efficiency, process simplification and cost reduction

Active Publication Date: 2017-08-04
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution requires the introduction of a precision mask to increase the number of evaporation alignments, and the complex process is not conducive to mass production

Method used

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  • A kind of organic electroluminescence device and preparation method thereof
  • A kind of organic electroluminescence device and preparation method thereof
  • A kind of organic electroluminescence device and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as image 3 As shown, an organic electroluminescent device of the present invention includes a substrate (not shown in the figure), and a first electrode layer 1, several light-emitting unit layers and a second electrode layer sequentially formed on the substrate, Each of the light-emitting unit layers includes a first organic functional layer, a light-emitting material layer, and a second organic functional layer arranged on the first electrode layer 1, and the light-emitting material layer includes a blue light-emitting layer 4 and a green light-emitting layer 5 and a red light-emitting layer 6, the blue light-emitting layer 4 covers the first organic functional layer, the green light-emitting layer 5 is stacked on the blue light-emitting layer 4 and covers part of the blue light-emitting layer 4, the red light-emitting layer A barrier layer 7 is arranged between the light emitting layer 6 and the green light emitting layer 5. The barrier layer 7 described in thi...

Embodiment 2

[0057] Figure 4 A kind of organic electroluminescent device of the present invention shown, its structure is the same as embodiment 1, and wherein luminescent material layer comprises blue light emitting layer 4, green light emitting layer 5 and red light emitting layer 6, and red light emitting layer 6 is arranged on On the first organic functional layer, the barrier layer 7 above the red light emitting layer 6 is a hole barrier layer, the green light emitting material layer 5 is above the hole barrier layer, and the blue light emitting material layer 4 is above the green light emitting material layer 5, The blue light emitting layer 4 is covered by the second organic functional layer. Compared with the embodiment, the upper and lower positions of the red light emitting layer 6, the hole blocking layer, the green light emitting layer 5 and the blue light emitting layer 4 are reversed, and the stacking method remains unchanged. The red optical compensation layer 19 is still ...

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Abstract

The present invention relates to an organic electroluminescent device, which includes a substrate, and a first electrode layer, several light-emitting unit layers and a second electrode layer sequentially formed on the substrate, and each light-emitting unit layer is included in the A first organic functional layer, a luminescent material layer and a second organic functional layer arranged on an electrode layer, the luminescent material layer includes a blue light emitting layer, a green light emitting layer and a red light emitting layer, the blue light emitting layer and the The first organic functional layer or the second organic functional layer is in physical contact, the green light-emitting layer is stacked on the blue light-emitting layer and covers part of the blue light-emitting layer, and the red light-emitting layer is in contact with the green light-emitting layer A blocking layer is provided, and the projection of the red light-emitting layer covers part of the green light-emitting layer. The organic electroluminescent device with this structure only needs a set of precision mask plates in the manufacturing process to achieve three-color light emission, which can improve the yield rate, increase the aperture ratio, and increase the PPI of the display device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to an organic electroluminescent device with an optical compensation layer, and also relates to a preparation method of the organic electroluminescent device. Background technique [0002] An organic electroluminescent device (OLED) generally includes a plurality of pixels, each pixel consisting of several sub-pixels. One of the currently widely used schemes in small and medium sizes consists of red, green, and blue pixels forming one pixel. In order to obtain higher pixel resolution, the red, green, and blue sub-pixel layers need to use high-precision metal mask evaporation masks in the preparation process. Due to the high precision of the high-precision mask plate, each sub-pixel needs to be adjusted in position, and each adjustment will sacrifice part of the accuracy, thus increasing the cost of the device and limiting the realization of higher resolut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K50/11H10K2101/10H10K71/00
Inventor 李维维刘嵩
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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