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JP2003007453A - Organic EL device - Google Patents

Organic EL device

Info

Publication number
JP2003007453A
JP2003007453A JP2001192348A JP2001192348A JP2003007453A JP 2003007453 A JP2003007453 A JP 2003007453A JP 2001192348 A JP2001192348 A JP 2001192348A JP 2001192348 A JP2001192348 A JP 2001192348A JP 2003007453 A JP2003007453 A JP 2003007453A
Authority
JP
Japan
Prior art keywords
glass
organic
laminated film
alkali
soda
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001192348A
Other languages
Japanese (ja)
Inventor
Toshio Akimoto
俊夫 秋元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
N S G GLASS COMPONENTS KK
Original Assignee
N S G GLASS COMPONENTS KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by N S G GLASS COMPONENTS KK filed Critical N S G GLASS COMPONENTS KK
Priority to JP2001192348A priority Critical patent/JP2003007453A/en
Publication of JP2003007453A publication Critical patent/JP2003007453A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/84Passivation; Containers; Encapsulations
    • H10K50/841Self-supporting sealing arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

(57)【要約】 【課題】 アルカリによる有機EL積層膜へのダメージ
を大幅に低減し、長寿命の有機EL素子を得る。 【解決手段】 有機EL素子は、表面ガラス1の上に有
機EL積層膜2が形成され、この有機EL積層膜2を覆
うように背面ガラス3が表面ガラス1に紫外線硬化型の
エポキシ樹脂などの接着剤4(封止剤)を介して接着さ
れている。表面ガラス1及び背面ガラス3は無アルカリ
ガラスまたは低アルカリガラス若しくはアルカリ溶出防
止処理が施されたソーダライムガラスを用いる。
(57) [Summary] [PROBLEMS] To provide an organic EL device having a long life by greatly reducing damage to an organic EL laminated film due to alkali. SOLUTION: In the organic EL element, an organic EL laminated film 2 is formed on a surface glass 1, and a back glass 3 is formed on the surface glass 1 so as to cover the organic EL laminated film 2 by using an ultraviolet curable epoxy resin or the like. It is bonded via an adhesive 4 (sealant). The front glass 1 and the back glass 3 are made of non-alkali glass, low alkali glass, or soda lime glass that has been subjected to alkali elution prevention processing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明はコンピュータのモニ
タやTVなどの表示装置に用いられる有機EL(エレク
トロ・ルミネッセンス)素子に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic EL (electroluminescence) element used for a display device such as a computer monitor or a TV.

【0002】[0002]

【従来の技術】有機EL素子の一般的な構造は、表面ガ
ラスの上に有機EL積層膜を形成し、この有機EL積層
膜を背面ガラス等のカバーで気密に覆っている。そし
て、有機EL積層膜は水分や酸素に接触すると、発光特
性が急激に劣化する。これを防止するため種々の提案が
なされている。
2. Description of the Related Art In a general structure of an organic EL device, an organic EL laminated film is formed on a surface glass, and the organic EL laminated film is airtightly covered with a cover such as a back glass. Then, when the organic EL laminated film comes into contact with moisture or oxygen, the light emitting characteristics are rapidly deteriorated. Various proposals have been made to prevent this.

【0003】特開平5−89958号公報では、背面ガ
ラスに相当する封止板とガラス基板との間の封止空間に
シリコンオイルを充填するとともに封止板の内側面に水
分を吸着するシリカゲルを塗布することが提案され、特
開平10−275679号公報では、背面ガラスに相当
する封止ガラスの内面側に吸湿性の多孔質層を形成する
ことが提案され、特開2000−260562号公報で
は、背面ガラスの内面側にアルカリ土類一酸化物(Ba
O)からなる吸湿膜を形成することが提案され、また特
開2001−68266号公報では、表面ガラスと背面
ガラスに相当する封止部材の間の封止空間内に、吸着剤
を混合したゲル部材を充填する提案がなされている。
In Japanese Unexamined Patent Publication No. 5-89958, a silica gel which fills a sealing space between a sealing plate corresponding to a back glass and a glass substrate with silicon oil and adsorbs moisture on the inner surface of the sealing plate is disclosed. It is proposed to apply, and in JP-A-10-275679, it is proposed to form a hygroscopic porous layer on the inner surface side of the sealing glass corresponding to the back glass, and in JP-A-2000-260562. , The alkaline earth monoxide (Ba
It has been proposed to form a hygroscopic film consisting of O), and JP-A-2001-68266 discloses a gel in which an adsorbent is mixed in the sealed space between the sealing members corresponding to the front glass and the rear glass. Proposals have been made to fill components.

【0004】[0004]

【発明が解決しようとする課題】有機EL積層膜は水分
や酸素のみでなく、アルカリ(Na)に接触した場合に
もダメージを受け、有機EL素子の寿命が短くなる。一
方、表面ガラスまたは背面ガラスにソーダガラスを用い
ると、経時的にガラスからアルカリが溶出し、前記した
ように有機EL素子にダメージを与える。このアルカリ
溶出に対する対策は前記した従来の先行技術では解決さ
れない。
The organic EL laminated film is damaged not only by moisture and oxygen but also by contact with alkali (Na), which shortens the life of the organic EL element. On the other hand, when soda glass is used for the front surface glass or the rear surface glass, alkali elutes from the glass over time, and the organic EL element is damaged as described above. The countermeasure against this alkali elution cannot be solved by the above-mentioned conventional prior art.

【0005】[0005]

【課題を解決するための手段】上記課題を解決するため
本発明に係る有機EL素子は、有機EL積層膜の封入空
間を形成する表面ガラス及び背面ガラスを、無アルカリ
ガラス、有機EL積層膜の封着空間を形成する面にSi
O2膜が形成されたソーダガラス、有機EL積層膜の封
着空間を形成する面が酸洗浄されたソーダガラスまたは
有機EL積層膜の封着空間を形成する面が化学強化され
たソーダガラスの何れかとした。
In order to solve the above-mentioned problems, an organic EL device according to the present invention has a surface glass and a back glass forming an enclosed space of an organic EL laminated film, a non-alkali glass and an organic EL laminated film. Si on the surface that forms the sealing space
Any of soda glass on which an O2 film is formed, soda glass whose surface forming the sealing space of the organic EL laminated film is acid-cleaned, or soda glass whose surface forming the sealing space of the organic EL laminated film is chemically strengthened I thought

【0006】前記表面ガラスと背面ガラスを同一素材と
することで、温度変化を受けた場合に、熱膨張係数の差
に起因して接着剤に応力(せん断力)が発生して、接着
剤の劣化による有機EL素子の寿命低減を防止すること
ができる。尚、表面ガラス及び背面ガラスの厚さは0.
3〜1.1mmとし、同じ厚さのものを用いるのが好ま
しい。
By using the same material for the front glass and the rear glass, stress (shearing force) is generated in the adhesive due to the difference in coefficient of thermal expansion when the temperature changes, and It is possible to prevent the life of the organic EL element from being shortened due to deterioration. In addition, the thickness of the front glass and back glass is 0.1.
It is preferable to use 3 to 1.1 mm with the same thickness.

【0007】また、背面ガラスについては、熱間プレス
法にて成形することが好ましい。熱間プレス法にて成形
することで、乾燥剤収納スペースを簡単に形成すること
ができ、また表面に微細な凹凸を一体的に形成すること
ができる。尚、乾燥剤を収納しない場合には、背面側か
ら画像を見ることができる。この場合に背面ガラスの表
面に微細な凹凸を形成しておけば、微細な凹凸が外光を
散乱するため、ノングレア効果が発揮される。したがっ
て、屋外で使用されることが多い携帯電話には極めて有
効となる。
The back glass is preferably formed by a hot pressing method. By molding by the hot pressing method, the desiccant storage space can be easily formed, and fine irregularities can be integrally formed on the surface. When the desiccant is not stored, the image can be seen from the back side. In this case, if fine unevenness is formed on the surface of the back glass, the fine unevenness scatters external light, so that a non-glare effect is exhibited. Therefore, it is extremely effective for mobile phones that are often used outdoors.

【0008】[0008]

【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。図1は本発明に係る有機EL
素子の断面図であり、有機EL素子は、表面ガラス1の
上に有機EL積層膜2が形成され、この有機EL積層膜
2を覆うように背面ガラス3が表面ガラス1に紫外線硬
化型のエポキシ樹脂などの接着剤4(封止剤)を介して
接着されている。なお、接着を行う場合には水分の影響
をなくすため、減圧下で行ってもよい。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an organic EL according to the present invention.
FIG. 3 is a cross-sectional view of the element, and in the organic EL element, the organic EL laminated film 2 is formed on the surface glass 1, and the back glass 3 covers the surface of the organic EL laminated film 2 and the surface glass 1 is an ultraviolet curing epoxy. It is adhered via an adhesive 4 (sealant) such as resin. It should be noted that the bonding may be performed under reduced pressure in order to eliminate the influence of moisture.

【0009】有機EL積層膜2はITOからなる陽極2
1、有機EL膜22及び陰極23を積層して構成され、
有機EL膜22は更に正孔輸送層、発光層、電子輸送層
から構成される。尚、有機EL積層膜2としては蒸着に
よって形成される低分子有機ELの他に、インクジェッ
トによる高分子有機ELであってもよい。
The organic EL laminated film 2 is an anode 2 made of ITO.
1, a stack of an organic EL film 22 and a cathode 23,
The organic EL film 22 further includes a hole transport layer, a light emitting layer, and an electron transport layer. The organic EL laminated film 2 may be a high molecular weight organic EL formed by inkjet, as well as a low molecular weight organic EL formed by vapor deposition.

【0010】また、表面ガラス1及び背面ガラス3は本
実施例では何れも0.7mm厚の無アルカリガラスまた
は低アルカリガラス若しくはアルカリ溶出防止処理が施
されたソーダライムガラスを用いる。表面ガラス1及び
背面ガラス3の厚みとしては0.3mm〜1.1mmが
好ましい。0.3未満では強度的に不充分となり、1.1
mmを超えると通常背面板として使用されているステン
レス板よりも重くなり、メリットがなくなる。
In this embodiment, the front glass 1 and the rear glass 3 are both non-alkali glass having a thickness of 0.7 mm, low alkali glass or soda lime glass subjected to alkali elution prevention treatment. The thickness of the front glass 1 and the rear glass 3 is preferably 0.3 mm to 1.1 mm. If it is less than 0.3, the strength will be insufficient and 1.1
If it exceeds mm, it becomes heavier than the stainless steel plate which is usually used as the back plate, and there is no merit.

【0011】アルカリ溶出防止処理としては、ソーダラ
イムガラス表面にSiO2などをコーティングする処理、
ソーダライムガラスを高温水に接触されるか酸洗浄する
ことで脱アルカリする処理、化学強化によりソーダライ
ムガラス表面のNa(ナトリウム)原子をK(カリウ
ム)原子に交換する処理などが考えられる。
As the alkali elution preventing treatment, a treatment of coating the surface of soda lime glass with SiO 2 or the like,
It is considered that the soda lime glass is treated with hot water or washed with an acid to dealkalize it, or the chemical strengthening is used to exchange Na (sodium) atoms on the surface of the soda lime glass for K (potassium) atoms.

【0012】また、背面ガラス3は成形型を用いた熱間
プレスにて成形され、一部に酸化バリウムなどの乾燥剤
5の収納凹部31を形成している。熱間プレスの条件は
上下の成形型間に80mm×80mmで厚さ0.9mm
のソーダライムガラスを挟んで、窒素雰囲気で950℃
の加熱炉に投入し、成形後は成形型の酸化を防ぐため2
00℃以下まで冷却した後、成形品を払い出す。
The back glass 3 is formed by hot pressing using a forming die, and a recess 31 for accommodating the desiccant 5 such as barium oxide is formed in a part thereof. The conditions for hot pressing are 80 mm x 80 mm between the upper and lower molds and a thickness of 0.9 mm.
Sandwiching soda lime glass of 950 ℃ in a nitrogen atmosphere
2) to prevent the mold from oxidizing after molding.
After cooling to below 00 ° C, the molded product is discharged.

【0013】ここで、前記熱間プレスの成形型表面に
は、Raで1〜10μmの微細な凹凸を形成され、プレス
成形の際に背面ガラス3表面に微細な凹凸32を転写
し、ノングレア効果を高めている。
Here, a Ra of 1 to 10 μm is formed on the surface of the mold of the hot press, and the fine unevenness 32 is transferred to the surface of the back glass 3 during press molding to obtain a non-glare effect. Is increasing.

【0014】図2は別実施例に係る有機EL素子の断面
図であり、この実施例にあっては、乾燥剤の収納凹部を
省略して背面ガラス3をフラットに近い形状にし、乾燥
剤を入れていない。乾燥剤を入れないことで、フラット
な背面ガラス3側から画像を見ることができる。この場
合に前記した微細な凹凸32が存在することで、反射防
止効果を高めることができる。
FIG. 2 is a cross-sectional view of an organic EL device according to another embodiment. In this embodiment, the recessed portion for storing the desiccant is omitted, and the rear glass 3 is formed into a shape close to a flat surface, and I have not put it. The image can be viewed from the flat rear glass 3 side by not including the desiccant. In this case, the presence of the fine irregularities 32 described above can enhance the antireflection effect.

【0015】以下の(表は)本発明にかかる有機EL素
子の評価結果を示すものであり、この(表)から、本発
明によれば、高温高湿でもアルカリが溶出による寿命の
低下のない有機EL素子が得られることが分る。
The following (Table) shows the evaluation results of the organic EL device according to the present invention. From this (Table), according to the present invention, there is no reduction in life due to elution of alkali even at high temperature and high humidity. It can be seen that an organic EL device can be obtained.

【0016】[0016]

【表1】 [Table 1]

【0017】[0017]

【発明の効果】以上説明したように本発明に係る有機E
L素子によれば、表面ガラス及び背面ガラスを、無アル
カリガラス(アルカリ溶出のおそれがないので好まし
い)、有機EL積層膜の封着空間を形成する面にSiO2
膜が形成されたソーダガラス、有機EL積層膜の封着空
間を形成する面が酸洗浄されたソーダガラスまたは有機
EL積層膜の封着空間を形成する面が化学強化されたソ
ーダガラスの何れかとしたので、アルカリによる有機E
L積層膜へのダメージを大幅に低減し、長寿命の有機E
L素子を得ることができる。
As described above, the organic E according to the present invention
According to the L element, the front surface glass and the rear surface glass are made of non-alkali glass (which is preferable because there is no risk of alkali elution) and SiO2 on the surface forming the sealing space of the organic EL laminated film.
Either soda glass on which the film is formed, soda glass whose surface forming the sealing space of the organic EL laminated film is acid-cleaned, or soda glass whose surface forming the sealing space of the organic EL laminated film is chemically strengthened. Since it was done, organic E with alkali
Dramatically reduces damage to the L laminated film and has a long life
An L element can be obtained.

【0018】また、前記表面ガラスと背面ガラスを同一
素材とすることで、熱膨張係数の差に起因する有機EL
素子の反りを防止することができ、背面ガラスを熱間プ
レス法にて成形することで、乾燥剤収納スペースを簡単
に形成することができ、また表面に反射防止用の微細な
凹凸を一体的に形成することができる。
Further, by using the same material for the front surface glass and the rear surface glass, the organic EL element due to the difference in thermal expansion coefficient
It is possible to prevent warpage of the element, and by forming the back glass by hot pressing, it is possible to easily form a desiccant storage space and to integrate fine irregularities for antireflection on the surface. Can be formed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る有機EL素子の断面図FIG. 1 is a sectional view of an organic EL device according to the present invention.

【図2】別実施例に係る有機EL素子の断面図FIG. 2 is a sectional view of an organic EL device according to another embodiment.

【符号の説明】[Explanation of symbols]

1…表面ガラス、2…有機EL積層膜、21…陽極、2
2…有機EL膜、23…陰極、3…背面ガラス、31…
乾燥剤の収納凹部、32…微細な凹凸、4…接着剤、5
…乾燥剤。
1 ... Surface glass, 2 ... Organic EL laminated film, 21 ... Anode, 2
2 ... Organic EL film, 23 ... Cathode, 3 ... Back glass, 31 ...
Storage agent recess, 32 ... Fine irregularities, 4 ... Adhesive, 5
…desiccant.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 表面ガラスの上に有機EL積層膜が形成
され、この有機EL積層膜を覆うように背面ガラスが表
面ガラスに封着された有機EL素子において、前記表面
ガラス及び背面ガラスは、無アルカリガラス、有機EL
積層膜の封着空間を形成する面にSiO2膜が形成された
ソーダガラス、有機EL積層膜の封着空間を形成する面
が酸洗浄されたソーダガラスまたは有機EL積層膜の封
着空間を形成する面が化学強化されたソーダガラスの何
れかとしたことを特徴とする有機EL素子。
1. An organic EL device comprising an organic EL laminated film formed on a surface glass and a back glass sealed to the surface glass so as to cover the organic EL laminated film, wherein the surface glass and the back glass are: Alkali-free glass, organic EL
A soda glass on which a SiO2 film is formed on the surface forming the sealing space of the laminated film, a surface on which the sealing space of the organic EL laminated film is formed is acid-cleaned, or a sealing space of the organic EL laminated film is formed. An organic EL element characterized in that the surface to be treated is any one of soda glass chemically strengthened.
【請求項2】 請求項1に記載の有機EL素子におい
て、前記表面ガラスと背面ガラスとは同一素材からなる
ことを特徴とする有機EL素子。
2. The organic EL element according to claim 1, wherein the front glass and the rear glass are made of the same material.
【請求項3】 請求項1に記載の有機EL素子におい
て、前記背面ガラスは熱間プレス法にて乾燥剤収納スペ
ースが一体的に形成されていることを特徴とする有機E
L素子。
3. The organic EL device according to claim 1, wherein the back glass has a desiccant storage space integrally formed by a hot pressing method.
L element.
【請求項4】 請求項1に記載の有機EL素子におい
て、前記背面ガラスは熱間プレス法にて表面に微細な凹
凸が一体的に形成されていることを特徴とする有機EL
素子。
4. The organic EL device according to claim 1, wherein the back glass has fine irregularities integrally formed on the surface thereof by a hot pressing method.
element.
JP2001192348A 2001-06-26 2001-06-26 Organic EL device Pending JP2003007453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001192348A JP2003007453A (en) 2001-06-26 2001-06-26 Organic EL device

Publications (1)

Publication Number Publication Date
JP2003007453A true JP2003007453A (en) 2003-01-10

Family

ID=19030812

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2003007453A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003065769A1 (en) * 2002-01-28 2003-08-07 Nippon Sheet Glass Co., Ltd. Back sealing member for organic electroluminescence device, glass substrate for organic electroluminescence device, organic electroluminescence device, and methods for manufacturing sealing member and glass substrate
JP2012036074A (en) * 2010-07-12 2012-02-23 Nippon Electric Glass Co Ltd Glass plate
JP2012525312A (en) * 2009-04-30 2012-10-22 オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツング Device having first and second substrates and method for manufacturing the same
JP2012530026A (en) * 2009-06-15 2012-11-29 セイジ・エレクトロクロミクス,インコーポレイテッド Laminated glass plate and use thereof
JP2015517179A (en) * 2012-03-23 2015-06-18 エルジー・ケム・リミテッド Substrates for organic electronic devices

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003065769A1 (en) * 2002-01-28 2003-08-07 Nippon Sheet Glass Co., Ltd. Back sealing member for organic electroluminescence device, glass substrate for organic electroluminescence device, organic electroluminescence device, and methods for manufacturing sealing member and glass substrate
JP2012525312A (en) * 2009-04-30 2012-10-22 オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツング Device having first and second substrates and method for manufacturing the same
JP2012530026A (en) * 2009-06-15 2012-11-29 セイジ・エレクトロクロミクス,インコーポレイテッド Laminated glass plate and use thereof
US11097513B2 (en) 2009-06-15 2021-08-24 Sage Electrochromics, Inc. Laminated glass pane and use thereof
JP2012036074A (en) * 2010-07-12 2012-02-23 Nippon Electric Glass Co Ltd Glass plate
JP2015180595A (en) * 2010-07-12 2015-10-15 日本電気硝子株式会社 glass plate
JP2015517179A (en) * 2012-03-23 2015-06-18 エルジー・ケム・リミテッド Substrates for organic electronic devices

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