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Novel transparent OLED device

A transparent and device technology, applied in the field of OLED devices, can solve the problems of low transmittance, large occupied area of ​​the conductive part, and smaller area of ​​the hollow part, etc., to ensure the driving ability, improve the brightness of the device, and improve the effect of light transmittance.

Pending Publication Date: 2022-01-28
湖南恒显坤光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cathode also has a hollow structure, that is, the conductive part is evaporated on the mask plate, and the adjacent conductive part is a hollow structure, and the conductive part is designed into a regular shape such as a circle, a square, a rhombus, and a triangle, such as , when the conductive part is designed in a square, rhombus, or triangular shape, the conductive part and the hollowed out shape are both symmetrical in shape and have the same size, but this structure cannot produce obvious non-uniform electric field changes on the one hand, and the brightness performance of the device is poor; on the other hand On the one hand, the conductive part occupies a large area, resulting in low transmittance
When the conductive part is designed in a circular shape, the area of ​​the hollow part becomes smaller, resulting in low transmittance and poor visualization effect

Method used

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  • Novel transparent OLED device
  • Novel transparent OLED device
  • Novel transparent OLED device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 and figure 2 Shown: a new type of transparent OLED device, including an anode 1, a first transport layer, a light emitting layer 3, a second transport layer and a cathode 6 arranged in sequence; the cathode 6 includes a conductive part and a transparent or hollow non-conductive part 61 , the non-conductive portion 61 is S-shaped, and the width of the non-conductive portion 61 is greater than the width of the conductive portion adjacent to it.

[0023] In this embodiment, the anode 1 is an ITO glass substrate, the first transport layer is a hole transport layer 2, specifically a heat-treated PSS material, the light-emitting layer is a PVV material, and the second transport layer includes an electron transport layer 4 and an electron injection layer. 5. The electron transport layer 4 is quinoline aluminum, the electron injection layer 5 is lithium fluoride, the cathode 6 is a mask, the conductive part is aluminum, and the non-conductive part 61 is hollo...

Embodiment 2

[0028] Such as image 3 Shown: The difference with Embodiment 1 is that the width of each non-conductive portion 61 is different, for example: the width of several non-conductive portions 61 located on both sides is twice the width of the second conductive portion 63, while the width of the non-conductive portion 61 located in the middle The widths of the several non-conductive parts are 1.5 times the width of the second conductive part, so that the width of the non-conductive parts on both sides is greater than the width of the non-conductive part in the middle. In this way, the light transmittance at the edge can be improved, and the light transmittance in the middle is relatively concentrated. Compared with Embodiment 1, the visualization effect is better.

[0029] Other structures are with embodiment 1.

Embodiment 3

[0031] The difference from Embodiment 1 is that the width of the first conductive portion is smaller than the width of the second conductive portion, thereby increasing the length of the hollow surface and increasing the light transmittance.

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Abstract

The invention discloses a novel transparent OLED device which comprises an anode, a first transmission layer, a light-emitting layer, a second transmission layer and a cathode which are arranged in sequence, the cathode comprises a conductive part and a transparent or hollow non-conductive part, the non-conductive part is S-shaped, and the width of the non-conductive part is larger than that of the conductive part adjacent to the non-conductive part. On one hand, the structure is simple, and the driving capability can be ensured while the light transmittance is improved; and on the other hand, a non-uniform electric field can be generated, and the device brightness is improved.

Description

technical field [0001] The invention relates to an OLED device, in particular to a novel transparent OLED device. Background technique [0002] Organic electroluminescence refers to the phenomenon that organic materials emit light under the excitation of electric current or electric field. According to the different organic electroluminescent materials used, people sometimes refer to devices made of organic small molecules as light-emitting materials as organic electroluminescent devices, OLED for short, and devices made of polymers as electroluminescent materials. The device is called a polymer electroluminescent device, or PLED for short, but the two are generally referred to as an organic electroluminescent device, or OLED for short. [0003] The existing OLED structure mainly includes a transparent anode and a metal cathode, and a first transmission layer, a light emitting layer and a second transmission layer are arranged between the transparent anode and the metal cat...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52
CPCH10K50/822H10K50/00
Inventor 袁治坤胡凯
Owner 湖南恒显坤光电科技有限公司