KR101673862B1 - Transparent electrode film for OLED, transparent OLED device and method for manufacturing thereof - Google Patents
Transparent electrode film for OLED, transparent OLED device and method for manufacturing thereof Download PDFInfo
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- KR101673862B1 KR101673862B1 KR1020150070878A KR20150070878A KR101673862B1 KR 101673862 B1 KR101673862 B1 KR 101673862B1 KR 1020150070878 A KR1020150070878 A KR 1020150070878A KR 20150070878 A KR20150070878 A KR 20150070878A KR 101673862 B1 KR101673862 B1 KR 101673862B1
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Abstract
The present invention relates to a transparent electrode film for a large-area transparent OLED, a large-area transparent OLED device and a method for manufacturing the same, more specifically, a thick metal pattern can be used without a risk of leakage current and short circuit, A transparent electrode film for a large area transparent OLED, a large area transparent OLED device including the same, and a method for manufacturing the same.
According to the transparent electrode film for a large area transparent OLED of the present invention, it is possible to use a thick metal pattern without the risk of leakage current and short circuit, and it can be used as a low resistance auxiliary electrode and also it is possible to form a high aspect ratio electrode pattern, There is an effect that a highly transparent electrode can be formed. In addition, according to the large-area transparent OLED device and the method of manufacturing the same of the present invention, since the auxiliary electrode is provided in the transparent upper electrode, it is possible to form a high transparency electrode having a wide opening ratio, It is effective.
Description
The present invention relates to a transparent electrode film for a large-area transparent OLED, a large-area transparent OLED device and a method for manufacturing the same, more specifically, a thick metal pattern can be used without a risk of leakage current and short circuit, A transparent electrode film for a large area transparent OLED, a large area transparent OLED device including the same, and a method for manufacturing the same.
Recently, a transparent display device has been proposed. The transparent display device is a display device that normally functions as a display device for maintaining a transparent state such as a glass and realizing an image or an image.
Such a transparent display device has recently been attracting attention because it is highly utilized as a medium for product advertisement in a building glass, a shop window, a display booth, and the like.
As a display device capable of realizing such a transparent display device, an organic electroluminescent device capable of self-emission is used. This is because a display device such as a liquid crystal display device is not a self-luminous element but a light-receiving element, and thus a transparent display device can not be realized because a backlight unit is required.
A general transparent organic electroluminescent device OLED includes a lower electrode connected to the driving thin film transistor DTr and an organic emission layer LA for emitting red, green, blue (R, G, B) do.
The magnesium silver alloy (Mg: Ag) used as the upper electrode of the transparent OLED is a top emission type transparent cathode, and is a transparent electrode widely used in commercialized OLED displays. The magnesium silver alloy (Mg: Ag) has an energy state capable of serving as a negative electrode in the device, and is formed into a thin film in the form of a thin film because of its good light transmittance due to the nature of the material during its manufacture
However, in the case of a magnesium silver alloy (Mg: Ag) thin film used for a large-area transparent OLED device, it is required to use an auxiliary electrode which can lower it due to a high sheet resistance.
However, the magnesium silver alloy (Mg: Ag) thin film is easily oxidized due to its material properties, and there is a problem that it is difficult to form the auxiliary electrode on the upper side by using RIE or etching in the photolithography process .
Therefore, it is required to develop an auxiliary electrode for lowering the sheet resistance of a transparent upper electrode used in a large-area transparent OLED.
The inventors of the present invention completed the present invention by developing a transparent electrode film for a large area transparent OLED including a built-in transparent mesh electrode.
Accordingly, an object of the present invention is to provide a transparent electrode film for a large-area transparent OLED capable of using a thick metal pattern without the risk of leakage current and short circuit and being usable as a low resistance electrode.
Another object of the present invention is to provide a large-area transparent OLED element and a method of manufacturing the same, which can form a high transparency electrode having a wide aperture ratio and an electrode pattern having a high aspect ratio as well as a low sheet resistance by providing an auxiliary electrode on the upper electrode .
The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.
In order to accomplish the above object, an embodiment of the present invention is a transparent electrode film for a large area transparent OLED, comprising: a transparent polymer adhesive substrate; And a transparent mesh-type metal electrode embedded in the transparent polymer adhesive base material so as to be partially exposed.
In a preferred embodiment, the transparent electrode film for a large-area transparent OLED is a transparent auxiliary electrode adhered on a transparent upper electrode, and one surface of the transparent polymeric adhesive substrate including the exposed surface of the embedded transparent metal- Is bonded onto the transparent upper electrode.
In a preferred embodiment, the transparent polymer adhesive base material is made of a thermoplastic resin or a thermosetting resin.
In a preferred embodiment, the transparent mesh-type metal electrode includes at least one of silver (Ag), aluminum (Al), copper (Cu), and gold (Au).
In a preferred embodiment, the transparent mesh-type metal electrode has an aspect ratio of 3: 1 or less.
According to another aspect of the present invention, there is provided a large area transparent OLED device comprising: a transparent lower electrode formed on a substrate; A light emitting layer formed on the transparent lower electrode; A transparent upper electrode formed on the light emitting layer; And a transparent auxiliary electrode formed on the transparent upper electrode, wherein the transparent auxiliary electrode comprises: the transparent polymer adhesive substrate; And a transparent mesh-type metal electrode buried in the transparent polymer adhesive base material so as to be partially exposed, the exposed surface of which is adhered to the transparent upper electrode.
In a preferred embodiment, the transparent upper electrode is formed of a magnesium-silver alloy (Mg: Ag).
In a preferred embodiment, the thickness of the transparent upper electrode is in a range of 1 to 15 nm.
In a preferred embodiment, the transparent polymer adhesive base material is made of a thermoplastic resin or a thermosetting resin.
In a preferred embodiment, the transparent mesh-type metal electrode includes at least one of silver (Ag), aluminum (Al), copper (Cu), and gold (Au).
In a preferred embodiment, the transparent mesh-type metal electrode has an aspect ratio of 3: 1 or less.
According to another aspect of the present invention, there is provided a method of manufacturing a large-area transparent OLED device, comprising: preparing a transparent auxiliary electrode having a transparent mesh-type metal electrode embedded in a transparent polymer- ; And the transparent auxiliary electrode is adhered onto the transparent upper electrode formed on the substrate, wherein the transparent electrode is formed on the upper surface of the transparent upper electrode, And a second transparent electrode formed on the second transparent electrode.
In a preferred embodiment, the first step includes: forming a transparent mesh-type metal electrode on a transfer substrate; Placing the transfer substrate on which the transparent mesh-type metal electrode is formed on a transparent polymeric adhesive substrate; Hot-pressing the transfer substrate at a predetermined temperature and pressure condition to embed the transparent mesh-type metal electrode in the transparent polymeric adhesive substrate; And separating the transparent substrate and the transparent polymer adhesive substrate in which the transparent mesh type metal electrode is embedded.
In a preferred embodiment, the step of forming the transparent mesh-type metal electrode on the transfer substrate may include performing a surface treatment to lower the surface energy of the transfer substrate, and then forming the transparent mesh-type metal electrode. As the surface treatment process used herein, a surface treatment process using a self-assembled monolayer such as OTS, FOTS, or FDTS can be used.
In a preferred embodiment, the transparent upper electrode is formed of a magnesium-silver alloy (Mg: Ag).
In a preferred embodiment, the thickness of the transparent upper electrode is in a range of 1 to 15 nm.
In a preferred embodiment, the transparent polymer adhesive base material is made of a thermoplastic resin or a thermosetting resin.
In a preferred embodiment, the transparent mesh-type metal electrode includes at least one of silver (Ag), aluminum (Al), copper (Cu), and gold (Au).
In a preferred embodiment, the transparent mesh-type metal electrode is formed to have an aspect ratio of 3: 1 or less.
The present invention has the following excellent effects.
First, according to the transparent electrode film for a large area transparent OLED of the present invention, a thick metal pattern can be used without a risk of leakage current and short circuit, and it can be used as a low resistance auxiliary electrode, There is an effect that a highly transparent electrode having an aperture ratio can be formed.
In addition, according to the transparent electrode film for a large-area transparent OLED of the present invention, it can be used as an auxiliary electrode to be bonded to a transparent upper electrode of a large-area transparent OLED.
In addition, according to the large-area transparent OLED device and the method of manufacturing the same of the present invention, since the auxiliary electrode is provided in the transparent upper electrode, it is possible to form a high transparency electrode having a wide opening ratio, It is effective.
1 is a view showing a transparent electrode film for a large area transparent OLED according to an embodiment of the present invention,
2 is a view showing a large area transparent OLED device according to another embodiment of the present invention,
3A to 3E are process drawings showing a method of manufacturing a large area transparent OLED device according to another embodiment of the present invention.
Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.
Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.
However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.
1 is a view showing a transparent electrode film for a large area transparent OLED according to an embodiment of the present invention.
Referring to FIG. 1, a
The transparent polymeric
The transparent mesh-
As the transparent mesh-
Meanwhile, it is preferable that the transparent mesh-
The
As described above, the
As the transparent upper electrode, various metals and metal alloys can be used, and a magnesium silver alloy (Mg: Ag) is often used. The magnesium silver alloy (Mg: Ag) has an energy state capable of serving as a negative electrode in the device, and since it has a good light transmittance due to the characteristics of the material during its manufacture, it can be used as a thin upper electrode.
Preferably, the magnesium silver alloy (Mg: Ag) is an alloy in which magnesium (Mg) and silver (Ag) are mixed in a ratio of about 70:30, and is formed into a thin film having a thickness in the range of 1 to 15 nm . However, when such a thin film type magnesium silver alloy (Mg: Ag) is used as an upper electrode of a large-area OLED device, the problem of high sheet resistance is caused. Therefore, the
2 is a view showing a large-area transparent OLED device according to another embodiment of the present invention.
2, a large area
Like the
At this time, the transparent mesh-
The transparent polymeric
As the transparent mesh-
Meanwhile, it is preferable that the transparent mesh-
As the transparent upper electrode, various metals and metal alloys can be used, and a magnesium silver alloy (Mg: Ag) is often used. Since the magnesium silver alloy (Mg: Ag) has an energy state capable of serving as a cathode in the device and the thin film can be used because the light transmittance is good due to the nature of the material when the thin film is manufactured, .
Preferably, the magnesium silver alloy (Mg: Ag) is an alloy in which magnesium (Mg) and silver (Ag) are mixed in a ratio of about 70:30, and is formed into a thin film having a thickness in the range of 1 to 15 nm . However, when such a thin film type magnesium silver alloy (Mg: Ag) is used as an upper electrode of a large-area OLED device, a problem of high sheet resistance is caused. Therefore, the
Therefore, the large area
3A to 3E are process drawings showing a method of manufacturing a large area transparent OLED device according to another embodiment of the present invention.
3A to 3E, a method of manufacturing a large area transparent OLED device according to another embodiment of the present invention will be described.
A method of manufacturing a large area
The first step is a step of manufacturing the
As the transfer substrate S, a substrate such as a glass or silicon wafer can be used, and the transparent mesh-
Various methods can be used as the method of forming the transparent mesh-
In addition, the transparent mesh-
As the transparent mesh-
At this time, it is preferable that the transparent mesh-
Next, the transfer substrate S on which the transparent mesh-
The transparent polymeric
Next, the transparent substrate S is hot pressed by using a roller R under a predetermined temperature and pressure condition to embed the transparent mesh-
Next, the transparent polymeric
Next, the transparent polymeric
Finally, in the second step, the transparent
At this time, a variety of metals and metal alloys can be used as the transparent upper electrode. In the embodiment of the present invention, a magnesium silver alloy (Mg: Ag) is used.
Preferably, the magnesium silver alloy (Mg: Ag) is an alloy in which magnesium (Mg) and silver (Ag) are mixed in a ratio of about 70:30, and is formed into a thin film having a thickness in the range of 1 to 15 nm .
The method of manufacturing a large area
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.
100: Transparent electrode film for large area transparent OLED 110: Transparent polymer adhesive substrate
120: transparent mesh-type metal electrode 200: large-area transparent OLED element
210: substrate 220: transparent lower electrode
230: light emitting layer 240: transparent upper electrode
250: transparent auxiliary electrode
Claims (19)
A first step of preparing a transparent auxiliary electrode comprising a transparent mesh-type metal electrode embedded in a transparent polymeric adhesive base so that a part thereof is exposed; And
Wherein the transparent auxiliary electrode is adhered on the transparent upper electrode formed on the substrate, and a second side of the transparent polymeric adhesive base including the exposed surface of the embedded transparent metal mesh electrode is bonded to the transparent upper electrode, Comprising:
The first step
Forming a transparent mesh-type metal electrode on the transfer substrate;
Placing the transfer substrate on which the transparent mesh-type metal electrode is formed on a transparent polymeric adhesive substrate;
Hot-pressing the transfer substrate at a predetermined temperature and pressure condition to embed the transparent mesh-type metal electrode in the transparent polymeric adhesive substrate; And
And separating the transparent substrate and the transparent polymer adhesive substrate having the transparent mesh-type metal electrode embedded therein.
The step of forming the transparent mesh-type metal electrode on the transfer substrate
Wherein the surface of the transparent substrate is treated with a surface treatment to lower the surface energy of the transfer substrate, and then the transparent mesh-type metal electrode is formed.
Wherein the transparent upper electrode is formed of a magnesium-silver alloy (Mg: Ag).
Wherein the transparent upper electrode has a thickness in a range of 1 to 15 nm.
Wherein the transparent polymer adhesive base material is made of a thermoplastic resin or a thermosetting resin.
Wherein the transparent mesh-type metal electrode comprises at least one of silver (Ag), aluminum (Al), copper (Cu), and gold (Au) Way.
Wherein the transparent mesh-type metal electrode is formed to have an aspect ratio of 3: 1 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150070878A KR101673862B1 (en) | 2015-05-21 | 2015-05-21 | Transparent electrode film for OLED, transparent OLED device and method for manufacturing thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150070878A KR101673862B1 (en) | 2015-05-21 | 2015-05-21 | Transparent electrode film for OLED, transparent OLED device and method for manufacturing thereof |
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| KR101673862B1 true KR101673862B1 (en) | 2016-11-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100092220A (en) * | 2009-02-12 | 2010-08-20 | 삼성전자주식회사 | Multi-display apparatus |
| KR101144610B1 (en) | 2011-08-02 | 2012-05-11 | 한국기계연구원 | Embeded method of conductive mesh for transparent electrode |
| KR101146266B1 (en) * | 2003-09-12 | 2012-05-15 | 글로벌 오엘이디 테크놀러지 엘엘씨 | Oled device |
| KR101499279B1 (en) * | 2011-10-07 | 2015-03-09 | 주식회사 엘지화학 | Substrate for organic electronic device |
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2015
- 2015-05-21 KR KR1020150070878A patent/KR101673862B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101146266B1 (en) * | 2003-09-12 | 2012-05-15 | 글로벌 오엘이디 테크놀러지 엘엘씨 | Oled device |
| KR20100092220A (en) * | 2009-02-12 | 2010-08-20 | 삼성전자주식회사 | Multi-display apparatus |
| KR101144610B1 (en) | 2011-08-02 | 2012-05-11 | 한국기계연구원 | Embeded method of conductive mesh for transparent electrode |
| KR101499279B1 (en) * | 2011-10-07 | 2015-03-09 | 주식회사 엘지화학 | Substrate for organic electronic device |
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