KR100240442B1 - Fabricating method of rod-type organic electroluminescent device for l.e.d. - Google Patents
Fabricating method of rod-type organic electroluminescent device for l.e.d. Download PDFInfo
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- KR100240442B1 KR100240442B1 KR1019960056141A KR19960056141A KR100240442B1 KR 100240442 B1 KR100240442 B1 KR 100240442B1 KR 1019960056141 A KR1019960056141 A KR 1019960056141A KR 19960056141 A KR19960056141 A KR 19960056141A KR 100240442 B1 KR100240442 B1 KR 100240442B1
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- electroluminescent device
- organic electroluminescent
- light
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- 238000000034 method Methods 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 11
- 239000010453 quartz Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims abstract description 3
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 230000005525 hole transport Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000005357 flat glass Substances 0.000 abstract description 4
- 239000011368 organic material Substances 0.000 abstract description 4
- 238000000295 emission spectrum Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- FJNCXZZQNBKEJT-UHFFFAOYSA-N 8beta-hydroxymarrubiin Natural products O1C(=O)C2(C)CCCC3(C)C2C1CC(C)(O)C3(O)CCC=1C=COC=1 FJNCXZZQNBKEJT-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 125000006617 triphenylamine group Chemical class 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- Optics & Photonics (AREA)
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- Electroluminescent Light Sources (AREA)
Abstract
본 발명은 LED에 사용되는 발광층으로 유기물질을 사용한 전기발광소자에 관한 것으로, 일반적으로 제조되는 평평한 유리기판상부에 음전극과 양전극을 형성하고, 상기 음전극과 양전극 사이에 유기 발광물질을 형성하여 평판형으로 제조하던 유기 전기발광소자의 발광되는 빛이 측면으로 손실되는 것을 방지하기 위하여 기판으로 사용되는 유리를 봉형의 유리, 석영 또는 광섬유를 사용하고, 상기 유리봉의 표면에 양전극을 코팅한 후, 양전극 표면에 유기 발광물질과 음전극을 순차적으로 형성하여 원형의 전기 발광소자를 제조함으로써, 평판 유기 전기발광소자에서 측면으로 유실되던 빛의 손실을 방지할 수 있는 유기 전기발광소자 및 그 제조방법을 제공한다.The present invention relates to an electroluminescent device using an organic material as a light emitting layer used for an LED, and more particularly, to an electroluminescent device using an organic material as a light emitting layer for an LED, comprising a cathode and a cathode formed on a flat glass substrate, Quartz or an optical fiber used as a substrate is used as a substrate in order to prevent light emitted from the organic electroluminescent device manufactured by the organic electroluminescent device from being lost to the side, a positive electrode is coated on the surface of the glass rod, The present invention provides an organic electroluminescent device capable of preventing the loss of light that is lost to the side of a flat panel organic electroluminescent device by manufacturing a circular electroluminescent device by sequentially forming an organic luminescent material and a negative electrode on the substrate.
Description
본 발명은 발광층이 유기물로 형성되어 있는 전기발광표시소자에 관한 것으로, 특히 전기발광소자의 기판이 되는 유리를 봉형태로 제조하고, 유리봉의 표면에 양,음 전극과 발광층을 형성하여 제조한 봉형의 유기 전기발광소자 및 그 제조방법에 관한 것이다.The present invention relates to an electroluminescent display device in which a light emitting layer is formed of an organic material, and more particularly, to an electroluminescent display device in which a glass serving as a substrate of an electroluminescent device is formed into a rod shape and a positive electrode and a light emitting layer are formed on the surface of the glass rod. And a method of manufacturing the same.
일반적으로 유기 ELD를 제조하는 종래의 기술은 도1에 도시된 바와같이 유리를 재료로 제조된 평편한 기판(11) 상부에 양극으로 투명전극(12)을 일정한 두께로 코팅한 다음, 호스트 물질로서 발광물질의 안정성을 얻을 수 있으며, 열적 내성이 좋은 폴리이미드와 게스트(Guest)물질인 발광물질을 용매인 클로로포름(CHCL2) 녹여 혼합한다. 다음에 상기 투명전극(12) 상부에 정공수송 물질인 TPD를 코팅하고, 상기 정공수송물질 상부에 상기 호스트와 게스트 혼합물의 박막증착하여 발광층(13)을 형성한다. 이때 게스트 물질로 사용되는 발광 물질은 단일 물질을 사용하거나 단일물질을 합성하는 과정에서 그 단일물질에 치환기를 붙이거나 코폴리머 형태의 고분자를 이용하여 발광층(13)으로 사용하였다. 다음에 상기 혼합물을 열처리 공정을 거쳐 폴리이미드화시키고, 상기 폴리이미드화된 혼합물 상부에 전자수송물질을 코팅한다. 마지막으로 상기 전자수송물질 상부에 음극을 인가할 금속전극(14)을 형성함으로써 유기 전기발광소자를 제조하였다.1, a transparent electrode 12 is coated on a flat substrate 11 made of glass to form a transparent electrode 12 as an anode, and then a transparent electrode 12 is formed as a host material A polyimide having good thermal stability and a luminescent material as a guest material is dissolved in chloroform (CHCL 2 ) as a solvent. Next, TPD, which is a hole transporting material, is coated on the transparent electrode 12, and a thin film of the host and the guest mixture is deposited on the hole transporting material to form a light emitting layer 13. In this case, the light emitting material used as the guest material is used as a light emitting layer 13 by using a single material or by attaching a substituent to the single material or by using a copolymer type polymer in the course of synthesizing a single material. Next, the mixture is subjected to a heat treatment process to form polyimide, and an electron transporting material is coated on the polyimidized mixture. Finally, an organic electroluminescent device was fabricated by forming a metal electrode 14 on the electron transport material to which a cathode was to be applied.
상술한 종래의 유기 전기발광소자에 전원을 인가하여 발광체가 발광을 하게되면 유기 발광체로부터 발광된 빛(15)은 투명전극(12)과 평판 유리(11)를 관통하여 관측자의 눈에 비치게 된다. 그러나 기판이 평편한 유리이기 때문에 발광되는 빛이 유리면에 수직한 방향으로도 누출(16)되어 실제로 관측하는 방향인 유리의 면방향에서의 빛은 약하게 관측된다는 문제점이 있다.When the light emitting body emits light by applying power to the conventional organic electroluminescent device, the light 15 emitted from the organic light emitter passes through the transparent electrode 12 and the flat glass 11 and is displayed on the viewer's eyes . However, since the substrate is flat glass, the emitted light leaks 16 in a direction perpendicular to the glass surface, and the light in the plane direction of the glass, which is a direction actually observed, is weakly observed.
상기 문제점을 해결하기 위하여 본 발명은 빛이 관측되는 기판을 유리, 석영 또는 광섬유로 봉형태로 제조하고, 그 표면에 양전극으로 투명전극을 형성한다음, 상기 양전극 표면에 발광층을 형성하고, 발광층 표면에 금속으로 음전극을 형성함으로써, 봉형태의 중심으로 집광된 빛을 방출하여 빛의 손실없이 광효율을 증가시킨 봉형의 유기 전기발광소자 및 그 제조방법을 제공하는 것을 목적으로 한다.In order to solve the above problems, the present invention provides a method for manufacturing a light emitting device, comprising: preparing a substrate on which light is observed by a rod, glass, quartz or an optical fiber; forming a transparent electrode as a positive electrode on the surface; forming a light emitting layer on the surface of the positive electrode; Type organic electroluminescent device in which light is condensed at the center of a rod shape to increase light efficiency without loss of light, and a method of manufacturing the same.
도1는 종래의 평판형 녹색 유기 전기발광소자를 나타낸 단면도.1 is a cross-sectional view of a conventional planar green organic electroluminescent device.
도2은 종래의 녹색광을 발생시키는 유기물인 Alq3 및 홀 전달물질인 TPD의 화학구조식FIG. 2 is a graph showing the relationship between Alq3 as an organic material for generating green light and TPD as a hole-
도3는 본 발명에 따른 봉형 녹색 유기 전기발광소자를 나타낸 사시도.3 is a perspective view illustrating a bar-type green organic electroluminescent device according to the present invention.
도4은 본 발명에 따라 제조된 봉형 녹색 유기 전기 발광소자의 발광방향을 나타낸 단면도.4 is a cross-sectional view illustrating a light emitting direction of a rod-shaped green organic electroluminescent device manufactured according to the present invention.
도5는 Alq3을 이용한 전기발광소자의 발광 스펙트럼을 나타낸 그래프.5 is a graph showing the emission spectrum of an electroluminescent device using Alq 3 .
＜도면의주요부분에대한부호의설명＞Description of the Related Art
11 : 평판유리 12 :유기 발광층11: flat plate glass 12: organic light emitting layer
13 : 양전극 14 : 음전극13: Positive electrode 14: Negative electrode
15 : 관측되는 빛 16 : 손실되는 빛15: Observed light 16: Lost light
21 : Tris(8-hydroxy quinolinato)aluminum(Alq3)21: Tris (8-hydroxy quinolinato ) aluminum (Alq 3)
22 : Triphenyl amine Derivative(TPD)22: Triphenyl amine Derivative (TPD)
31 : 봉형 유리 32 : 양전극31: rod-shaped glass 32: positive electrode
33 : 유기 발광층 34 : 음전극33: organic light emitting layer 34: negative electrode
35 : 발광된 빛의 집광방향 36 : 집광된 빛의 방출 방향35: direction of condensation of emitted light 36: direction of condensed light emission
51 : Alq3의 발광 스펙트럼51: emission spectrum of Alq 3
본 발명은 유기 전기발광소자를 제조하는데 있어서 전기발광소자의 형태를 봉형으로 제조하여 종래의 평판형 전기발광소자에서 발생하던 발광되는 빛의 누출을 방지하는 전기발광소자 및 그 제조방법을 제공한다.The present invention provides an electroluminescent device and a method of manufacturing the electroluminescent device, which can prevent leakage of light emitted from a conventional planar electroluminescent device by manufacturing a shape of the electroluminescent device in the shape of a rod in manufacturing an organic electroluminescent device.
먼저 도2는 본 발명에서 게스트 물질로 사용될 녹색광을 발생시키는 ALQ3(21)와 홀전달 물질인 TPD(22)의 화학구조식을 나타낸 것이다.First, FIG. 2 shows the chemical structure of ALQ 3 (21) for generating green light to be used as a guest material and TPD (22) as a hole transfer material in the present invention.
다음에 도3은 본 발명에 따라 제조된 봉형의 녹색 유기 전기발광소자를 나타낸 것으로, 그 제조방법은 먼저 유리, 석영 또는 광섬유 등으로 제조된 봉형의 기판(31) 표면에 양전극을 인가하기 위한 투명전극(ITO)으로 양전극(32)을 형성한 다음, 상기 투명전극 상부에 홀(정공) 전달 물질(도시도지 않음)인 TPD(22)를 코팅한다. 다음에 상기 홀 전달 물질 상부에 도2에 도시된 녹색광을 발생시키는 Alq3(21)를 게스트 물질로하고 폴리이미드를 호스트 물질로 혼합하여 발광층(33)을 형성하고, 상기 발광층(33) 상부에 전자수송 물질(도시되지 않음)과 음극을 인가할 금속박막으로 음전극(34)을 순차적으로 형성하여 봉형의 녹색 유기 전기발광소자를 제조한다.Next, FIG. 3 shows a bar-shaped green organic electroluminescent device manufactured according to the present invention. Firstly, a method for manufacturing a green organic electroluminescent device is described. First, a transparent electrode for applying a positive electrode to the surface of a rod- shaped substrate 31 made of glass, quartz, A positive electrode 32 is formed of an ITO electrode and then a TPD 22 which is a hole transfer material (not shown) is coated on the transparent electrode. Next, a light emitting layer 33 is formed by mixing Alq3 (21) generating green light shown in FIG. 2 as a guest material and polyimide as a host material on the hole transferring material, A negative electrode 34 is sequentially formed of a transporting material (not shown) and a metal thin film to which a negative electrode is to be applied to produce a bar-shaped green organic electroluminescent device.
상기와 같이 제조된 봉형 녹색 유기 전기발광소자는 양전극(32)에 양극을 연결하고, 음전극(34)에 음극을 연결하여 전원을 인가하면 발광층의 양단에 전자(P-)와 정공(P+)을 주입하면 Poraron-Exciton을 형성하고, 이들이 재결합하면서 EL을 방출하게 된다. 이때 방출되는 빛은 도3에 도시된 바와 같이 외부는 금속전극으로 싸여있기 때문에 외부로는 방출되지 않고, 투명전극을 투과하여 봉형 기판의 중심으로 집광(35)되게 되고, 상기 집광된 빛은 봉형태 기판의 단면방향(36)으로 광도파되어 녹색광을 방출하게 된다. 이때 한쪽을 불투명 물질로 덮어씨우게 되면 한쪽 방향으로만 발광된 빛이 방출되게 된다.When the anode is connected to the anode 32 and the anode is connected to the cathode 34, power is applied to the rod-shaped green organic electroluminescent device manufactured as described above, electrons (P - ) and holes (P + , Poraron-Exciton is formed, and EL is released as they are recombined. 3, the emitted light is not emitted to the outside, but is transmitted through the transparent electrode to be converged (35) at the center of the rod-shaped substrate, and the condensed light is transmitted through the rod And is radiated in the cross-sectional direction 36 of the shape substrate to emit green light. At this time, when one side is covered with opaque material, the light emitted only in one direction is emitted.
다음에 도5은 본 발명에 따라 제조된 녹색 발광층을 같는 유기 전기발광소에 사용된 Alq3(21)의 발광스펙트럼(51)을 나타낸 것이다.Next, FIG. 5 shows the emission spectrum 51 of Alq 3 (21) used in the organic electroluminescent device having the green light emitting layer manufactured according to the present invention.
종래의 평판형 전기발광소자는 유리의 면방향으로의 전기발광된 빛이 누출되기 때문에 관측방향에서의 빛의 강도가 그 만큼 약하게 되므로, 적정한 밝기로 발광시키기 위해서는 전압을 더 높여야 하므로 에너지의 손실 및 높은 전압에 의한 Joule 열의 발생으로 전기발광소자의 수명이 짧아지는 문제점이 있었으나, 본 발명에 의해 제조된 봉형의 전기발광소자는 전기 발광된 빛의 손실을 방지할 수 있으므로 전기발광소자의 효율을 증가시킬 수 있고 또한 수명을 연장시킬 수 있다.Since the electroluminescent light in the plane direction of the glass leaks, the intensity of the light in the viewing direction is reduced so much. Therefore, in order to emit light at a proper brightness, the voltage must be further increased, The lifetime of the electroluminescent device is shortened due to the generation of Joule heat due to the high voltage. However, since the rod-shaped electroluminescent device manufactured by the present invention can prevent the loss of electroluminescent light, the efficiency of the electroluminescent device is increased And can extend the service life.
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| KR1019960056141A KR100240442B1 (en) | 1996-11-21 | 1996-11-21 | Fabricating method of rod-type organic electroluminescent device for l.e.d. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100392707B1 (en) * | 2001-01-29 | 2003-07-28 | 주식회사모나미 | A organic light emitting diode and its manufacturing method |
| KR100806194B1 (en) * | 2005-08-22 | 2008-02-22 | 세이코 엡슨 가부시키가이샤 | Electroluminescence apparatus and manufacturing method of the same |
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1996
- 1996-11-21 KR KR1019960056141A patent/KR100240442B1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR19980037396A (en) | 1998-08-05 |
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