JPH04363890A - Electric field luminescent device - Google Patents
Electric field luminescent deviceInfo
- Publication number
- JPH04363890A JPH04363890A JP3163445A JP16344591A JPH04363890A JP H04363890 A JPH04363890 A JP H04363890A JP 3163445 A JP3163445 A JP 3163445A JP 16344591 A JP16344591 A JP 16344591A JP H04363890 A JPH04363890 A JP H04363890A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- organic
- organic thin
- electric field
- compound
- 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
Links
- 230000005684 electric field Effects 0.000 title abstract 4
- 239000010409 thin film Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 16
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 claims description 23
- 230000006866 deterioration Effects 0.000 abstract description 11
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000000891 luminescent agent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 8
- RVZRBWKZFJCCIB-UHFFFAOYSA-N perfluorotributylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F RVZRBWKZFJCCIB-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 230000005525 hole transport Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- -1 polycyclic aromatic organic compounds Chemical class 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- YGLVWOUNCXBPJF-UHFFFAOYSA-N (2,3,4,5-tetraphenylcyclopenta-1,4-dien-1-yl)benzene Chemical compound C1=CC=CC=C1C1C(C=2C=CC=CC=2)=C(C=2C=CC=CC=2)C(C=2C=CC=CC=2)=C1C1=CC=CC=C1 YGLVWOUNCXBPJF-UHFFFAOYSA-N 0.000 description 1
- JCXLYAWYOTYWKM-UHFFFAOYSA-N (2,3,4-triphenylcyclopenta-1,3-dien-1-yl)benzene Chemical compound C1C(C=2C=CC=CC=2)=C(C=2C=CC=CC=2)C(C=2C=CC=CC=2)=C1C1=CC=CC=C1 JCXLYAWYOTYWKM-UHFFFAOYSA-N 0.000 description 1
- QDOIZVITZUBGOQ-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,4-nonafluoro-n,n-bis(1,1,2,2,3,3,4,4,4-nonafluorobutyl)butan-1-amine;1,1,2,2,3,3,4,4,4-nonafluoro-n-(1,1,2,2,3,3,4,4,4-nonafluorobutyl)-n-(trifluoromethyl)butan-1-amine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F.FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F QDOIZVITZUBGOQ-UHFFFAOYSA-N 0.000 description 1
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- OAIASDHEWOTKFL-UHFFFAOYSA-N 3-methyl-n-[4-[4-(n-(4-methylphenyl)anilino)phenyl]phenyl]-n-phenylaniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=C(C)C=CC=1)C1=CC=CC=C1 OAIASDHEWOTKFL-UHFFFAOYSA-N 0.000 description 1
- 125000003349 3-pyridyl group Chemical group N1=C([H])C([*])=C([H])C([H])=C1[H] 0.000 description 1
- 125000000339 4-pyridyl group Chemical group N1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- AZWHFTKIBIQKCA-UHFFFAOYSA-N [Sn+2]=O.[O-2].[In+3] Chemical compound [Sn+2]=O.[O-2].[In+3] AZWHFTKIBIQKCA-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- FYJQJMIEZVMYSD-UHFFFAOYSA-N perfluoro-2-butyltetrahydrofuran Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)OC(F)(F)C(F)(F)C1(F)F FYJQJMIEZVMYSD-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、電極間に有機発光電界
物質を設けた素子で平面光源や表示装置に利用される有
機薄膜電界発光装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic thin film electroluminescent device which is an element in which an organic luminescent electroluminescent material is provided between electrodes and is used in flat light sources and display devices.
【0002】0002
【従来の技術】従来、有機化合物で電界発光物質を原料
としたEL(電界発光)素子は、安価で大きな面積のフ
ルカラー表示装置を実現するものとして注目を集めてい
る。例えば、有機化合物としてアントラセンやペリレン
等の縮合多環芳香族系を原料として、LB膜法や真空蒸
着法で薄膜化した有機薄膜素子が開発され、その発光特
性が研究されている。しかし、従来の有機薄膜EL素子
は駆動電圧が高く、かつその発光輝度の効率が無機薄膜
EL素子に比べて低かった。また有機薄膜素子は、発光
時の劣化も著しく実用レベルのものではなかった。とこ
ろが、最近、有機薄膜を2層構造にした新しいタイプの
有機薄膜EL素子が報告され、強い関心を集めている(
アブライド、フイジックス、レターズ、51巻, 91
3ページ、1987)。報告によれば、この有機薄膜E
L素子は、駆動電圧6〜7Vで数100 cd/m2の
輝度を得ている。2. Description of the Related Art Conventionally, EL (electroluminescent) devices made from organic compounds and electroluminescent materials have attracted attention as a means of realizing inexpensive, large-area full-color display devices. For example, organic thin film devices have been developed in which thin films are formed using LB film methods or vacuum evaporation methods using condensed polycyclic aromatic organic compounds such as anthracene and perylene as raw materials, and their light emitting properties are being studied. However, conventional organic thin film EL devices require a high driving voltage and have lower luminance efficiency than inorganic thin film EL devices. In addition, organic thin film elements were not at a practical level due to their significant deterioration during light emission. However, recently, a new type of organic thin film EL device with a two-layer organic thin film structure has been reported and is attracting strong interest (
Abride, Physics, Letters, Volume 51, 91
3 pages, 1987). According to reports, this organic thin film E
The L element obtains a luminance of several 100 cd/m2 at a driving voltage of 6 to 7V.
【0003】0003
【発明が解決しようとする課題】しかし、この有機薄膜
EL素子は電流駆動型であるために、電極間に高電流を
流さなければならない。その結果該EL素子は、ジュー
ル熱による発熱で素子の劣化を加速し、著しい場合には
素子が破壊する。また、本発明者らは、水分が該EL素
子の劣化を引き起こす原因のひとつであることを見い出
した。本発明は、以上述べたような原因で著しく劣化す
る従来の有機薄膜EL素子の事情に鑑みてなれたもので
あり、有機薄膜EL素子を特定な液で保持することによ
り、電極間に電流を流す際に発生するジュール熱を極力
抑えて、有機薄膜EL素子寿命の耐久性を向上させた有
機薄膜電界発光装置を提供することにある。[Problems to be Solved by the Invention] However, since this organic thin film EL element is of a current drive type, a high current must be passed between the electrodes. As a result, the EL element accelerates deterioration due to heat generation due to Joule heat, and in severe cases, the element is destroyed. Furthermore, the present inventors have discovered that moisture is one of the causes of deterioration of the EL element. The present invention was developed in view of the situation of conventional organic thin film EL devices which deteriorate significantly due to the causes mentioned above, and it is possible to maintain the organic thin film EL device with a specific liquid to pass a current between the electrodes. It is an object of the present invention to provide an organic thin film electroluminescent device in which the Joule heat generated during flowing is suppressed as much as possible and the durability of the life of an organic thin film EL element is improved.
【0004】0004
【課題を解決するための手段】すなわち本発明は、少な
くとも一方が透明である陽極と陰極の間に、少なくとも
一種類の有機化合物を含む電界発光物質層を設けた有機
薄膜電界発光素子を弗素化炭素からなる不活性液状化合
物中に保持してなることを特徴とする電界発光装置であ
る。[Means for Solving the Problems] That is, the present invention provides a fluorinated organic thin film electroluminescent device in which an electroluminescent material layer containing at least one type of organic compound is provided between an anode and a cathode, at least one of which is transparent. This is an electroluminescent device characterized by being held in an inert liquid compound made of carbon.
【0005】本発明に用いる有機薄膜EL素子は、陽極
と有機化合物からなる有機電界発光物質層、又は陽極と
無機半導体及び有機化合物からなる電界発光物質並びに
陰極を基本構成としている。そして陽極は、例えば金、
白金、パラジウム等の金属薄膜又は錫、インジウム−錫
等の酸化膜が用いられ、透明であるとなお好ましい。ま
た陰極は、真空蒸着が可能な固体金属であれば、金属が
単独蒸着でも共蒸着でもかまわない。The organic thin film EL device used in the present invention has a basic structure of an anode and an organic electroluminescent material layer made of an organic compound, or an anode, an electroluminescent material made of an inorganic semiconductor and an organic compound, and a cathode. And the anode is, for example, gold,
A metal thin film such as platinum or palladium or an oxide film such as tin or indium-tin is used, and it is more preferable that it is transparent. Further, the cathode may be a solid metal that can be vacuum-deposited, and the metal may be deposited singly or co-deposited.
【0006】また電極間に設けられる有機化合物からな
る有機電界発光物質とは、例えば、正孔輸送剤と電子輸
送発光剤、又は正孔輸送剤、発光剤及び電子輸送剤、さ
らに前記組み合わせからなる物質間又は該組み合わせか
らなる物質と層間で成分が連続して変化する傾斜構造部
分を示すもの、及び該組み合わせからなる物質の混合物
である。[0006] The organic electroluminescent substance made of an organic compound provided between the electrodes is, for example, a hole transporting agent and an electron transporting luminescent agent, or a hole transporting agent, a luminescent agent, an electron transporting agent, or a combination of the above. Those exhibiting a gradient structure portion in which the components continuously change between materials or between materials and layers made of the combination, and mixtures of materials made of the combination.
【0007】正孔輸送剤の具体例としては、芳香族アミ
ン誘導体、ポリインデン誘導体、ポリアニリン誘導体、
フタロシアニン、ポリビニルフタロシアニン、オキサジ
アゾール誘導体、その他の正孔輸送能を有する化合物及
びこれらの混合物や他のポリマーへの高濃度混合物等で
p型半導性を示す有機化合物である。Specific examples of hole transport agents include aromatic amine derivatives, polyindene derivatives, polyaniline derivatives,
Phthalocyanine, polyvinyl phthalocyanine, oxadiazole derivatives, other compounds with hole transport ability, mixtures thereof, and other organic compounds that exhibit p-type semiconductivity when mixed with other polymers at high concentrations.
【0008】次に電子輸送剤の具体例としては、2−(
4−tert−Butylphenyl)−1,2,3
−oxadiazole 及び5,10,15,20−
tetra(x)porphyrinでx=2−ピリジ
ル基、3−ピリジル基、4−ピリジル基、4−キノジル
基、6−キノジル基及びキノキサリル基等でn型半導体
的性質を示す化合物である。Next, as a specific example of an electron transport agent, 2-(
4-tert-Butylphenyl)-1,2,3
-oxadiazole and 5,10,15,20-
Tetra(x)porphyrin is a compound that exhibits n-type semiconductor properties where x=2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 4-quinodyl group, 6-quinodyl group, quinoxalyl group, etc.
【0009】さらに電子輸送発光剤の具体例としては、
オキシンと金属の錯体、テトラフェニルシクロペンタジ
エン、ペンタフェニルシクロペンタジエン及び電子輸送
剤を混合した発光性有機化合物等がある。また発光性有
機化合物としては、紫外線を照射して蛍光を発生する多
くの化合物が含まれる。Further, specific examples of electron transporting luminescent agents include:
Examples include a complex of oxine and a metal, a luminescent organic compound containing a mixture of tetraphenylcyclopentadiene, pentaphenylcyclopentadiene, and an electron transporting agent. Furthermore, the luminescent organic compounds include many compounds that generate fluorescence when irradiated with ultraviolet rays.
【0010】そして電極間に設けられる電界発光性物質
は、例えば(1)p型無機半導体薄膜と有機電子輸送発
光剤、(2)p型無機半導体薄膜と有機発光剤及び有機
電子輸送剤、(3)p型無機半導体薄膜と有機正孔輸送
剤及び有機電子輸送発光剤、(4)p型無機半導体薄膜
、有機正孔輸送剤、有機発光剤及び有機電子輸送剤、更
に(5)p型無機半導体薄膜と前記有機物質の混合薄膜
である。p型無機半導体薄膜の具体例としては、P型無
定型シリコン及びP型無定型炭化シリコン等がある。
そして上記の化合物は、それぞれの性質を有する代表的
なものであり、本発明はこれらに限定されるものでない
。The electroluminescent substance provided between the electrodes is, for example, (1) a p-type inorganic semiconductor thin film and an organic electron-transporting luminescent agent, (2) a p-type inorganic semiconductor thin film, an organic luminescent agent, and an organic electron-transporting agent, ( 3) p-type inorganic semiconductor thin film, organic hole transport agent and organic electron transport luminescent agent, (4) p-type inorganic semiconductor thin film, organic hole transport agent, organic luminescent agent and organic electron transport agent, further (5) p-type This is a mixed thin film of an inorganic semiconductor thin film and the organic substance. Specific examples of p-type inorganic semiconductor thin films include P-type amorphous silicon and P-type amorphous silicon carbide. The above-mentioned compounds are representative compounds having respective properties, and the present invention is not limited thereto.
【0011】次に本発明に使用する弗素化炭素からなる
不活性液状化合物としては、液状弗素化炭素化合物であ
れば、種々の沸点のものが使用できる。しかし実用上、
低沸点の液体は封止に特別な技術を必要とし、また封止
材料も蒸気圧に対抗する材料及び構造が必要となる。従
って好ましくは、沸点50℃以上の液状弗素化炭素化合
物である。そして具体的な例は、フロリナートFC−7
2(沸点56°C)、フロリナートFC−84(沸点8
0°C)、フロリナートFC−77(沸点97°C)、
フロリナートFC−75(沸点102°C)、フロリナ
ートFC−40(沸点155°C)フロリナートFC−
43(沸点174°C)及びフロリナート70(沸点2
15°C)が挙げられる。Next, as the inert liquid compound of fluorinated carbon used in the present invention, liquid fluorinated carbon compounds having various boiling points can be used. However, in practical terms,
Low-boiling liquids require special techniques for sealing, and the sealing material also requires materials and structures that resist vapor pressure. Therefore, preferred is a liquid fluorinated carbon compound having a boiling point of 50°C or higher. And a specific example is Florinat FC-7
2 (boiling point 56°C), Fluorinert FC-84 (boiling point 8
0°C), Fluorinert FC-77 (boiling point 97°C),
Fluorinert FC-75 (boiling point 102°C), Fluorinert FC-40 (boiling point 155°C) Fluorinert FC-
43 (boiling point 174°C) and Fluorinert 70 (boiling point 2
15°C).
【0012】電界発光素子に液状弗素化炭素化合物を浸
漬する方法は、例えば(1)透明な容器に液状弗素化炭
素を入れ、電極端子を付けた電界発光素子を投入して、
電極を引き出し、蓋をしてシールする方法、(2)電極
端子を付けた電界発光素子を少なくとも一方が透明なプ
ラスチックのシートで両面を覆い、電極端子がプラスチ
ック外に出るように袋状にシールし、液状弗素化炭素を
注入後、注入口をシールする方法、(3)電極端子を付
けた電界発光素子の光りを取り出さない側に、注入口の
付いた一方面が開いた箱体を電極端子が外に出るような
配置で接合して、注入口から液状弗素化炭素を注入後、
注入口をシールする方法が使用できる。そして浸漬容器
にフィン等の熱交換部品が付けられれば、更に好ましい
。また液状弗素化炭素化合物は、電界発光素子を浸漬す
る前に、乾燥した不活性ガスを吹き込む等の操作で脱酸
素処理をしておくと、酸素の影響を抑えることができる
。A method of immersing an electroluminescent device in a liquid fluorinated carbon compound is, for example, (1) placing liquid fluorinated carbon in a transparent container and placing an electroluminescent device attached with an electrode terminal therein;
(2) Cover both sides of the electroluminescent element with electrode terminals with a plastic sheet, at least one of which is transparent, and seal it in a bag shape so that the electrode terminals come out of the plastic. (3) A method of sealing the injection port after injecting liquid fluorinated carbon; (3) A method of sealing the injection port after injecting liquid fluorinated carbon. After joining so that the terminals come out and injecting liquid fluorinated carbon from the injection port,
A method of sealing the inlet can be used. It is further preferable if heat exchange parts such as fins are attached to the immersion container. Further, the influence of oxygen can be suppressed by deoxidizing the liquid fluorinated carbon compound by blowing in dry inert gas or the like before immersing the electroluminescent device.
【0013】次いで、電界発光素子を浸漬した液状弗素
化炭素化合物のパッケージ方法は、少なくとも電界発光
素子の発光面側が透明である容器になるように、設計す
ることが好ましい。また、電界発光素子の光りを取り出
さない側にのみ液状弗素化炭素化合物を浸漬するように
封止するのも必要箇所のみへの適用とする点で好ましい
方法である。[0013] Next, the method for packaging the liquid fluorinated carbon compound in which the electroluminescent element is immersed is preferably designed such that the container is transparent at least on the light emitting surface side of the electroluminescent element. Further, it is also a preferable method to seal the electroluminescent element by dipping the liquid fluorinated carbon compound only on the side from which light is not extracted, since the liquid fluorinated carbon compound is applied only to the necessary areas.
【0014】電界発光素子を浸漬した液状弗素化炭素化
合物のパッケージング材料は、液状弗素化炭素化合物が
化学的にも極めて安定であるため、多くの物質が使用可
能である。更に、接合材料及び接着剤等についてもパッ
ケージ材料同様多くの材料が使用できる。[0014] Many materials can be used as the packaging material for the liquid fluorinated carbon compound in which the electroluminescent device is immersed, since the liquid fluorinated carbon compound is chemically extremely stable. Furthermore, many materials can be used for bonding materials, adhesives, etc., as well as package materials.
【0015】この様に、本発明は実用上重要な多くの特
徴を有しているが、最も重要な点は電界発光素子の劣化
を加速する発熱を効果的に除去できることと、弗素化炭
素化合物に溶解する水分が極端に少ないこと、弗素化炭
素化合物が化学的に極めて安定な液状であることにより
、劣化が改良されることを特徴とするものである。As described above, the present invention has many practically important features, but the most important points are that the heat generation that accelerates the deterioration of electroluminescent elements can be effectively removed, and that the fluorinated carbon compound The deterioration of the fluorinated carbon compound is improved due to the extremely low amount of water dissolved in the fluorinated carbon compound and the fact that the fluorinated carbon compound is in a chemically extremely stable liquid state.
【0016】有機薄膜電界発光素子は改良されてきたと
は云え、光への変換効率は微々たるもので、電流の大部
分は熱として放射される。無機化合物に比べ有機化合物
は熱に対して弱く、結晶化や物質によっては分解する場
合もある。一般的な反応のように、発生する熱が劣化反
応を加速すると考えられるから、前記素子から発生する
熱を効果的に除去することにより、素子の劣化を飛躍的
に改良すると推定される。この様な考えに基づき、熱に
対する問題解決のために鋭意研究したところ、本発明は
、液状の弗素化炭素化合物に電界発光素子を浸漬するこ
とで熱の問題が解決できることを見い出した。更に、液
状弗素化炭素化合物は、金属蒸着で形成した電極の変質
を効果的に防止し、かつ、有機化合物からなる正孔輸送
剤や電子輸送発光剤等の有機薄膜層を全く変化させない
性質を有し、飛躍的に劣化が改良されることを見い出し
た。Although organic thin film electroluminescent devices have been improved, their conversion efficiency into light is negligible, and most of the current is emitted as heat. Organic compounds are more sensitive to heat than inorganic compounds, and may crystallize or decompose depending on the substance. Since it is thought that the heat generated accelerates the deterioration reaction like in a general reaction, it is estimated that effectively removing the heat generated from the element will dramatically improve the deterioration of the element. Based on this idea, as a result of intensive research to solve the problem of heat, the present invention discovered that the problem of heat could be solved by immersing an electroluminescent element in a liquid fluorinated carbon compound. Furthermore, liquid fluorinated carbon compounds effectively prevent deterioration of electrodes formed by metal vapor deposition, and have the property of not causing any change in organic thin film layers such as hole transport agents and electron transport luminescent agents made of organic compounds. It has been found that deterioration is dramatically improved.
【0017】本発明に使用する弗素化炭素からなる不活
性液状化合物は、完全に弗素化された構造を有している
ため、無色、透明及び無臭の不活性で低粘度の液体で大
きな絶縁耐力を有し、かつ熱伝導性はシリコン油の2倍
、強制送風冷却と比較すると5倍の能力がある。更に、
水も油もほとんど溶解しない性質を有しており、電極間
に設けられている有機化合物で形成された有機薄膜層を
溶解することもない。このため、電界発光素子は、劣化
が生じ難く、かつ劣化の進行も抑えられ、実用的に優れ
た特性を有する有機薄膜電界発光装置が得られる。The inert liquid compound made of fluorinated carbon used in the present invention has a completely fluorinated structure, so it is a colorless, transparent, odorless, inert, low viscosity liquid with a large dielectric strength. It has twice the thermal conductivity of silicone oil and five times the ability of forced air cooling. Furthermore,
It has the property of hardly dissolving in water or oil, and does not dissolve the organic thin film layer formed of an organic compound provided between the electrodes. For this reason, the electroluminescent element is unlikely to deteriorate, and the progress of deterioration is also suppressed, so that an organic thin film electroluminescent device having practically excellent characteristics can be obtained.
【0018】[0018]
【実施例】以下、本発明の実施例について詳細に説明す
る。
実施例1
基板ガラスに1000ÅのITO(酸化インジウム−酸
化錫膜)膜を形成した透明電極付きガラス基板(松崎真
空社製)をアセトン中で超音波洗浄し、次いで、エタノ
ール中で煮沸処理した。この表面処理した透明電極付き
ガラス基板を真空装置にセットし、5×10−6tor
rの真空度でN,N′−ジフェニル−N,N′−(3−
メチルフェニル)−1,1′−ビフェニル−4,4′−
ジアミン(以下TPDという)を 200Å蒸着し、引
続きTPDと8−オキシキノリノアルミニウム錯体(以
下AIq3 いう) との成分が連続して変化する濃度
勾配を持つ部分( 傾斜構造部)100 Åを形成し、
引続きAIq3を 200Å蒸着した。
更に、マグネシウム(Mg)と銀(Ag)を10:1の
原子比で2000Å共蒸着し有機薄膜電界発光素子を作
製した。 作製した素子は、弗素化炭素化合物液フロ
リナートFCー43(住友スリーエム社製:沸点 17
4℃,流動点−50℃)中に浸漬し直流で駆動した結果
、最高輝度7000cd/m2の緑色発光を観察した。
同様にフロリナートFCー43中へ浸漬し、電流密度6
8mA/cm2 、発光輝度1000cd/m2での輝
度半減時間を測定した結果、約1300分であった。[Examples] Examples of the present invention will be described in detail below. Example 1 A glass substrate with a transparent electrode (manufactured by Matsuzaki Shinku Co., Ltd.) on which a 1000 Å ITO (indium oxide-tin oxide film) film was formed was ultrasonically cleaned in acetone, and then boiled in ethanol. This surface-treated glass substrate with transparent electrodes was set in a vacuum device, and
N,N'-diphenyl-N,N'-(3-
methylphenyl)-1,1'-biphenyl-4,4'-
Diamine (hereinafter referred to as TPD) was deposited to a thickness of 200 Å, and then a 100 Å portion (gradient structure portion) having a concentration gradient in which the components of TPD and 8-oxyquinolinoaluminum complex (hereinafter referred to as AIq3) changed continuously was formed. ,
Subsequently, AIq3 was deposited to a thickness of 200 Å. Further, magnesium (Mg) and silver (Ag) were co-evaporated to a thickness of 2000 Å at an atomic ratio of 10:1 to produce an organic thin film electroluminescent device. The fabricated device was made using fluorinated carbon compound liquid Fluorinert FC-43 (manufactured by Sumitomo 3M Co., Ltd.: boiling point 17
As a result of driving with direct current while immersed in water (4°C, pour point -50°C), green light emission with a maximum brightness of 7000 cd/m2 was observed. Similarly, it was immersed in Fluorinert FC-43, and the current density was 6.
As a result of measuring the luminance half-life time at 8 mA/cm 2 and luminance of 1000 cd/m 2 , it was approximately 1300 minutes.
【0019】比較例1
実施例1で作製した有機薄膜電界発光素子を8×10−
5torrのガラスベルジャー型真空容器中で約 50
0cd/m2で駆動させたところガラス基板の破れを伴
う素子破壊が発生した。開放後、素子の状態を調べたと
ころ、素子が非常に熱くなっていた。Comparative Example 1 The organic thin film electroluminescent device produced in Example 1 was
Approx. 50 in a 5 torr glass bell jar vacuum container
When driven at 0 cd/m2, element destruction accompanied by breakage of the glass substrate occurred. After opening the circuit, we checked the condition of the element and found that it was extremely hot.
【0020】比較例2
実施例1で作製した有機薄膜電界発光素子を大気中で直
流駆動させたところ、駆動電圧19Vで最高輝度250
0cd/m2をピークに輝度が低下し23Vで破壊した
。大気中で、実施例1と同様に輝度1000cd/m2
での輝度半減時間を測定した結果17分であった。Comparative Example 2 When the organic thin film electroluminescent device produced in Example 1 was driven with direct current in the atmosphere, the maximum brightness was 250 at a driving voltage of 19V.
The brightness decreased after peaking at 0 cd/m2 and was destroyed at 23V. In the atmosphere, the brightness was 1000 cd/m2 as in Example 1.
The result of measuring the luminance half-life time was 17 minutes.
【0021】比較例3
実施例1で作製した有機薄膜電界発光素子をシリコンオ
イル(トーレシリコン社製、シリコンオイルSH510
)に浸漬し、発光輝度1000cd/m2での輝度半減
時間を測定した結果、約 200分であった。Comparative Example 3 The organic thin film electroluminescent device produced in Example 1 was coated with silicone oil (Silicon Oil SH510 manufactured by Toray Silicon Co., Ltd.).
) and measured the luminance half-life time at an emission luminance of 1000 cd/m2, which was approximately 200 minutes.
【0022】比較例4
実施例1で作製した有機薄膜電界発光素子をシクロヘキ
サン中に浸漬し、発光輝度1000cd/m2での輝度
半減時間の測定を行ったところ測定途中で薄膜がITO
ガラス基板から剥離する現象が認められ中止した。Comparative Example 4 When the organic thin film electroluminescent device prepared in Example 1 was immersed in cyclohexane and the luminance half-life time was measured at a luminance of 1000 cd/m2, the thin film turned into ITO during the measurement.
The phenomenon of peeling from the glass substrate was observed and the project was discontinued.
【0023】[0023]
【発明の効果】以上説明したように、本発明によれば信
頼性が大幅に改善された有機薄膜電界発光装置が提供さ
れる。このように、本発明により得られた有機薄膜電界
発光素子は、発光輝度及び発光時間が大幅に向上して実
用レベルまで引き上げることができ、その工業的価値は
高いものである。As described above, according to the present invention, an organic thin film electroluminescent device with significantly improved reliability is provided. As described above, the organic thin film electroluminescent device obtained according to the present invention has significantly improved luminance and luminescence time, and can be brought to a practical level, and has high industrial value.
Claims (1)
極の間に、少なくとも一種類の有機化合物を含む電界発
光物質層を設けた有機薄膜電界発光素子を弗素化炭素か
らなる不活性液状化合物中に保持してなることを特徴と
する電界発光装置。Claim 1: An organic thin film electroluminescent device comprising an electroluminescent material layer containing at least one type of organic compound provided between an anode and a cathode, at least one of which is transparent, in an inert liquid compound made of fluorinated carbon. An electroluminescent device characterized by being held.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3163445A JPH04363890A (en) | 1991-06-10 | 1991-06-10 | Electric field luminescent device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3163445A JPH04363890A (en) | 1991-06-10 | 1991-06-10 | Electric field luminescent device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04363890A true JPH04363890A (en) | 1992-12-16 |
Family
ID=15774023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3163445A Pending JPH04363890A (en) | 1991-06-10 | 1991-06-10 | Electric field luminescent device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04363890A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6465953B1 (en) | 2000-06-12 | 2002-10-15 | General Electric Company | Plastic substrates with improved barrier properties for devices sensitive to water and/or oxygen, such as organic electroluminescent devices |
US6611098B2 (en) | 2000-02-04 | 2003-08-26 | Nec Corporation | Hermetic encapsulation package and method of fabrication thereof |
JP2009140818A (en) * | 2007-12-07 | 2009-06-25 | Rohm Co Ltd | Organic el planar light emitting apparatus |
WO2011027815A1 (en) | 2009-09-04 | 2011-03-10 | 株式会社スリーボンド | Organic el element sealing member |
US8828500B2 (en) | 2008-11-28 | 2014-09-09 | Three Bond Co., Ltd. | Photocurable resin composition for sealing organic EL device |
-
1991
- 1991-06-10 JP JP3163445A patent/JPH04363890A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611098B2 (en) | 2000-02-04 | 2003-08-26 | Nec Corporation | Hermetic encapsulation package and method of fabrication thereof |
US6465953B1 (en) | 2000-06-12 | 2002-10-15 | General Electric Company | Plastic substrates with improved barrier properties for devices sensitive to water and/or oxygen, such as organic electroluminescent devices |
JP2009140818A (en) * | 2007-12-07 | 2009-06-25 | Rohm Co Ltd | Organic el planar light emitting apparatus |
US8828500B2 (en) | 2008-11-28 | 2014-09-09 | Three Bond Co., Ltd. | Photocurable resin composition for sealing organic EL device |
WO2011027815A1 (en) | 2009-09-04 | 2011-03-10 | 株式会社スリーボンド | Organic el element sealing member |
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