KR20010080796A - Fluorescence Material for the use of white color emitting and preparation thereof and the white color emitting method therefor - Google Patents
Fluorescence Material for the use of white color emitting and preparation thereof and the white color emitting method therefor Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000002360 preparation method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 title description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000012190 activator Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 5
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052738 indium Inorganic materials 0.000 claims abstract description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052716 thallium Inorganic materials 0.000 claims abstract description 3
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 239000010936 titanium Substances 0.000 claims abstract description 3
- 239000013078 crystal Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000000975 co-precipitation Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 2
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 claims description 2
- 229910001632 barium fluoride Inorganic materials 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 claims description 2
- 229910001637 strontium fluoride Inorganic materials 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 238000000295 emission spectrum Methods 0.000 description 5
- 238000004020 luminiscence type Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- -1 oxalic acid to it Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
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- C—CHEMISTRY; METALLURGY
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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- C09K11/62—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing gallium, indium or thallium
- C09K11/621—Chalcogenides
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
본 발명은 백색 발광용 형광체 및 그 제조방법 그리고 이를 이용한 백색광 발생방법에 관한 것이다. 본 발명의 백색 발광용 형광체는 하기의 화학식 1을 가지는 것을 특징으로 하며,The present invention relates to a white light emitting phosphor, a method of manufacturing the same, and a method of generating white light using the same. The white light emitting phosphor of the present invention is characterized by having the following Chemical Formula 1,
(앞의 식에서 x는 0.0에서 0.9의 범위 이내의 값을 가지며, y는 0.0에서 0.9의 범위 이내의 값을 가지며, M은 스칸듐, 티탄, 가돌리늄 및 란탄으로 이루어진 그룹 중에서 선택된 하나 이상의 금속원소이며, N은 갈륨, 인듐 및 탈륨늄으로 이루어진 그룹 중에서 선택된 하나이상의 금속원소이며, R은 활성제로서 테르륨, 세륨, 네오드뮴, 유로폼 및 이테르륨으로 이루어진 그룹중에서 하나 이상으로 선택된 것이다.) 본 발명에 의한 형광체를 청색 발광다이오드의 상부에 형성시키게 되면 보다 안정된 백색광을 얻을 수 있다.Where x is in the range 0.0 to 0.9, y is in the range 0.0 to 0.9, and M is at least one metal element selected from the group consisting of scandium, titanium, gadolinium and lanthanum, N is at least one metal element selected from the group consisting of gallium, indium and thallium, and R is at least one selected from the group consisting of terium, cerium, neodymium, euroform and ytterium as an activator. When the phosphor is formed on the blue light emitting diode, more stable white light can be obtained.
Description
본 발명은 백색광용 형광체와 그 제조방법 그리고 이를 이용한 백색광 발생방법에 관한 것이다.The present invention relates to a phosphor for white light, a manufacturing method thereof and a white light generating method using the same.
형광체는 순간적으로 발광현상을 나타내며, 발광 휘도가 높으므로, 이들 형광체는 고휘도의 발광용 전자소재에 자주 사용되어진다. 그러나 백색 발광다이오드의 경우, 청·적·녹색의 조합시에만 백색을 얻을 수 있으므로 다이오드의 소재가 각기 달라야하며 이것을 동시에 구동시킬 수 있도록 백색 발광다이오드를 제조하는 것은 매우 어렵다.Phosphors instantaneously exhibit luminescence phenomena and have high luminescence brightness, so these phosphors are frequently used in high-luminance luminescent electronic materials. However, in the case of white light emitting diodes, white can be obtained only when a combination of blue, red, and green is used, and thus the materials of the diodes must be different, and it is very difficult to manufacture white light emitting diodes so that they can be driven simultaneously.
또한 청·적·녹색 발광다이오드의 휘도가 시간에 따라서 변하는 정도가 각기 다르므로 오랜 시간을 구동시키면 처음과 다른 색을 발광하게 된다. 따라서 청색, 적색, 녹색 발광다이오드를 각각 조합하여 백색 발광다이오드를 사용하는데 여러 가지 문제점이 발생한다.In addition, since the luminance of the blue, red, and green light emitting diodes varies with time, the color may be different from the first one when driven for a long time. Therefore, various problems arise when using white light emitting diodes by combining blue, red, and green light emitting diodes, respectively.
따라서 청색의 발광다이오드에 녹색과 적색을 발광하는 형광체를 이용하여 백색을 얻을 수 있는 간단한 백색 발광다이오드가 종래의 문제점을 해결 할 수 있을 것이다.Therefore, a simple white light emitting diode that can obtain white color by using phosphors emitting green and red light on a blue light emitting diode may solve the conventional problem.
백색광용 형광체는 청색광을 흡수하면 녹색에서 적색까지의 비교적 넓은 파장범위의 가시광선을 발광한다. 따라서 백색광용 형광체가 형성된 청색 발광다이오드를 작동시키면, 형광체에 의해서 완전히 흡수되지 않고 발광되는 일부의 청색과 백색광용 형광체에서 발광되는 녹색에서 적색까지의 빛이 합쳐져서 백색이 발광하게 된다.The phosphor for white light emits visible light in a relatively wide wavelength range from green to red when it absorbs blue light. Therefore, when the blue light emitting diode in which the white light phosphor is formed is operated, white light is emitted by combining blue and white light emitted from the white light phosphor and some of the blue light emitted without being completely absorbed by the phosphor.
그러므로 상기의 원리를 응용하여 청색 발광다이오드에 본 발명에 따른 백색 발광용 형광체를 부착하여 안정성이 뛰어난 백색광이 나오는 발광다이오드의 제조에 사용이 가능하다.Therefore, by applying the above-mentioned principle, the white light emitting phosphor according to the present invention can be attached to a blue light emitting diode, thereby making it possible to use the light emitting diode which emits excellent white light.
본 발명은 상기한 바와 같은 제반 문제점을 해결하기 위한 것으로, 한 개의 청색 발광다이오드에 녹색에서 적색까지의 넓은 범위의 가시광선을 발광하는 형광체를 형성시켜 백색광을 얻을 수 있는 백색광용 다이오드에 사용되어지는 형광체를 제공하는 것을 목적으로 한다. 본 발명의 다른 목적은 보다 휘도가 증가되고 화학적으로 안정된 백색 발광용 형광체의 제조방법을 제공하는 것이다. 본 발명의 또 다른 목적은 종래의 백색 발광다이오드 보다 간단하면서도 안정된 고휘도의 백색 발광다이오드에 사용할 수 있는 백색광 발생 방법을 제공하는 것이다.The present invention is to solve the problems described above, to be used in a white light diode that can obtain a white light by forming a phosphor emitting a wide range of visible light from green to red on one blue light emitting diode It is an object to provide a phosphor. Another object of the present invention is to provide a method of manufacturing a white light-emitting phosphor which has increased brightness and is chemically stable. It is still another object of the present invention to provide a method of generating white light that can be used in a simpler and more stable white light emitting diode than a conventional white light emitting diode.
도 1은 본 발명에 따른 백색 발광용 형광체를 청색 발광다이오드의 상부에 부착하여 얻은 백색 발광다이오드의 발광스펙트럼이다.1 is a light emission spectrum of a white light emitting diode obtained by attaching a white light emitting phosphor according to the present invention on an upper portion of a blue light emitting diode.
도 2는 백색 발광다이오드에서 나오는 발광스펙트럼으로부터 계산된 색좌표도 위치와 색온도를 나타내는 색도도이다.FIG. 2 is a chromaticity diagram showing positions and color temperatures calculated from light emission spectra emitted from a white light emitting diode.
도 3은 청색 발광다이오드의 상부에 백색 발광용 형광체가 형성된 발광장치의 단면도이다.3 is a cross-sectional view of a light emitting device in which a white light emitting phosphor is formed on a blue light emitting diode.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 : 반사컵 2 : 청색 발광다이오드1: reflection cup 2: blue light emitting diode
3 : 납틀 4 : 연결선3: lead frame 4: connecting wire
5 : 백색광용 형광체가 분산된 투명수지 6 : 에폭시 렌즈5: transparent resin in which phosphor for white light is dispersed 6: epoxy lens
상기 목적을 달성하기 위한 본 발명에 따른 백색광용 형광체는 하기의 화학식 1로 표시된다.White light phosphor according to the present invention for achieving the above object is represented by the following formula (1).
화학식 1Formula 1
(Y1-xMx)3(Al1-yNy)5O12:R(Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 : R
(앞의 식에서 x는 0.0에서 0.9의 범위 이내의 값을 가지며, y는 0.0에서 0.9의 범위 이내의 값을 가지며, M은 스칸듐, 티탄, 가돌리늄 및 란탄으로 이루어진 그룹 중에서 선택된 하나 이상의 금속원소이며, N은 갈륨, 인듐 및 탈륨늄으로 이루어진 그룹 중에서 선택된 하나이상의 금속원소이며, R은 활성제로서 테르륨, 세륨, 네오드뮴, 유로폼 및 이테르륨으로 이루어진 그룹중에서 하나 이상으로 선택된것이다.)Where x is in the range 0.0 to 0.9, y is in the range 0.0 to 0.9, and M is at least one metal element selected from the group consisting of scandium, titanium, gadolinium and lanthanum, N is at least one metal element selected from the group consisting of gallium, indium and thallium, and R is at least one selected from the group consisting of terium, cerium, neodymium, euroform and ytterium as an activator.)
형광체의 제조시 상기의 성분 중 금속은 산화물을 사용하는 것이 바람직하다. 상기화학식에서 x의 값이 증가함에 따라 형광이 장파장으로 이동하다가 x가 0.9를 초과할 경우에는 형광성이 거의 없어지며, y가 증가함에 따라 형광이 단파장으로 이동하다가 y의 값이 0.9를 초과할 경우에는 또한 형광성을 잃는다.In the production of the phosphor, it is preferable to use an oxide as the metal in the above components. In the above formula, when fluorescence moves to a longer wavelength as x increases, if fluorescence is greater than 0.9, the fluorescence is almost eliminated, and when y increases, fluorescence moves to short wavelength and y exceeds 0.9. Also loses fluorescence.
또한 본 발명에 따른 백색광용 형광체를 구성하는 모결정의 소결시에 녹는점을 낮춰주어 결정성장을 용이하게 해주는 용융제로서 불화스트론듐, 불화칼슘, 불화알루미늄, 그리고 불화바륨 등이 사용될 수 있다. 용융제의 첨가량은 1.0 에서 50.0 중량의 범위가 적절하다. 이 범위를 초과하면 형광체의 결정구조가 변화하기 시작한다.In addition, strontium fluoride, calcium fluoride, aluminum fluoride, barium fluoride, etc. may be used as a melting agent to lower the melting point during sintering of the mother crystal constituting the phosphor for white light according to the present invention to facilitate crystal growth. . The addition amount of the melting agent is suitably in the range of 1.0 to 50.0 weight. If this range is exceeded, the crystal structure of the phosphor starts to change.
백색광용 형광체 (Y1-xMx)3(Al1-yNy)5O12:R의 제조과정은 형광체의 조성비에 따른 금속산화물을 섞은 후, 이것을 1300∼1700℃의 온도에서 소결하여 형광체를 얻을 수도 있으며, 또한 백색광용 형광체 (Y1-xMx)3(Al1-yNy)5O12:R을 합성할 때 조성비에 따른 금속산화물을 혼합하고, 이들을 질산 또는 황산과 같은 강산에 녹인후 이것에 옥살산과 같은 유기산을 첨가시킨 후, 이것을 다시 소결하여 얻을 수도 있다.Phosphor for white light (Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 : R is prepared by mixing metal oxides according to the composition ratio of the phosphor, and then sintering at a temperature of 1300-1700 ° C. Phosphors can be obtained, and when synthesizing white phosphors (Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 : R, the metal oxides are mixed according to the composition ratio, and these are mixed with nitric acid or sulfuric acid. It can also be obtained by dissolving in the same strong acid, adding an organic acid such as oxalic acid to it, and then sintering it again.
본 발명에 따른 백색광용 형광체 (Y1-xMx)3(Al1-yNy)5O12:R이 청색을 흡수하여 녹색에서 적색까지의 넓은 영역의 발광을 하게 되는 것은 R로 표현되는 활성제의 역할에 크게 영향을 받는다. 활성제의 첨가에 의하여, 활성제 원자의 d 궤도함수의 에너지 준위가 변화되어, 형광체의 발광의 세기 및 발광의 색의 조절이 가능하여진다. 뿐만 아니라, 동일한 활성제를 사용하더라도 모결정인 (Y1-xMx)3(Al1-yNy)5O12의 조성에 따라서 형광체의 광학적 성질이 크게 영향을 받는다. 따라서 적절한 조성의 활성제의 선택과 모결정 선택이 백색광용 형광체의 성능을 좌우하게 된다.Phosphor for white light (Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 : R according to the present invention absorbs blue and emits light in a wide area from green to red, represented by R. The role of the active agent is greatly affected. By the addition of the activator, the energy level of the d orbital function of the activator atom is changed, so that the intensity of the luminescence of the phosphor and the color of the luminescence can be adjusted. In addition, even if the same activator is used, the optical properties of the phosphor are greatly influenced by the composition of the parent crystal (Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 . Therefore, the selection of the active agent and the mother crystal of the appropriate composition will determine the performance of the white light phosphor.
백색광을 발생시키는 방법은 도 3과 같이 청색 발광다이오드(2)를 반사컵(1)위에 부착한 다음, 백색광용 형광체가 분산된 투명수지(5)를 발광다이오드 상부에 형성시키고, 납틀(Lead-Frame)(3)을 통전시켜 청색 발광다이오드를 발광시키는 것이다. 도 3의 미설명부호 4는 연결선이다. 투명수지의 바람직한 예는 에폭시 수지이다. 필요에 따라 형광체가 분산되지 아니한 투명수지(6)를 형광체가 분산된 투명수지 위에 다시 형성시킬 수도 있다.In the method of generating white light, a blue light emitting diode 2 is attached to the reflection cup 1 as shown in FIG. 3, and then a transparent resin 5 in which the white light phosphor is dispersed is formed on the light emitting diode, and a lead- Frame (3) is energized to emit blue light emitting diodes. Reference numeral 4 in FIG. 3 is a connection line. Preferred examples of the transparent resin are epoxy resins. If necessary, the transparent resin 6 in which the phosphor is not dispersed may be formed again on the transparent resin in which the phosphor is dispersed.
이하, 본 발명을 구체적인 실시예를 참조하여 상세히 설명한다. 이하의 실시예들은 본 발명을 예시하기 위한 것으로서 본 발명을 국한시키는 것으로 이해되어져서는 안될 것이다.Hereinafter, the present invention will be described in detail with reference to specific examples. The following examples are intended to illustrate the invention and should not be understood as limiting the invention.
<제조실시예 1 ~ 5><Production Examples 1 to 5>
아래의 표 1에 나타난 바와 같은 조성으로 각 원소들을 혼합하고, 1300~1700℃의 온도에서 고온소결시켜 본 발명에 따른 백색광용 형광체를 수득하였다. 입도분포는 입자크기분석기(Particle Size Analyser)를 이용하였으며, 10 내지 100㎛의 입자를 측정시료로 사용하였다.Each element was mixed with a composition as shown in Table 1 below, and sintered at a temperature of 1300 to 1700 ° C. to obtain a phosphor for white light according to the present invention. Particle size distribution was used for particle size analyzer (Particle Size Analyser), particles of 10 to 100㎛ was used as a measurement sample.
상기 표 1에서 제조실시예 1, 2, 4, 5는 단순히 시료를 혼합하여 1300∼1700℃에서 소결하였고, 제조실시예 3은 시료를 강산에 녹인 후 유기산을 첨가하여 공침을 얻은 시료를 소결한 것이다.In Table 1, Preparation Examples 1, 2, 4, and 5 were simply sintered at 1300 to 1700 ° C. by mixing samples, and Manufacturing Example 3 was sintered samples obtained by co-precipitation by adding organic acids after melting the samples in strong acids. .
<실시예 1 ~ 5><Examples 1 to 5>
제조실시예 1 ~ 5에 의하여 얻어진 형광체를 투명수지에 분산시켜 도 3에서와 같이 청색 발광다이오드 상부에 형성하였으며, 납틀(Lead-Frame)에 통전시켜 발생된 청색광이 투명수지에 분산된 형광체를 통과할 때 나오는 형광을 측정한 발광스펙트럼은 도 1과 같았다. 도 1에 따르면 모결정에 포함되는 가돌리듐이 증가할수록, 발광스펙트럼의 최대 발광파장이 증가하는 방향으로 이동하는 것으로 나타내었다. 그리고 최대 발광세기는 약간씩 증가하는 것을 나타내었다. 또한 인듐이 증가할수록 발광의 최대 발광파장이 아주 작은 정도로 감소하는 방향으로 이동하는 것으로 나타내었다. 또한 최대 발광세기는 약간씩 감소하는 것을 나타내었다. 실시예 3과 나머지 실시예들을 비교하면 발광의 세기에 큰 변화가 생겼다. 옥살산과 같은 유기산으로 공침하여 얻은 결과가 훨씬 더 좋은 발광 특성을 나타내었다.Phosphors obtained in Examples 1 to 5 were dispersed in a transparent resin and formed on the blue light emitting diode as shown in FIG. 3, and blue light generated by energizing a lead-frame was passed through the phosphor dispersed in the transparent resin. The emission spectrum was measured as shown in Figure 1 was measured. According to FIG. 1, as gadolinium contained in the mother crystal increases, the maximum emission wavelength of the emission spectrum increases. The maximum luminescence intensity was shown to increase slightly. In addition, it is shown that as the indium increases, the maximum emission wavelength of light emission moves to a very small extent. In addition, the maximum emission intensity was shown to decrease slightly. Comparing Example 3 with the rest of the examples, a great change occurred in the intensity of light emission. The results obtained by coprecipitation with an organic acid such as oxalic acid showed much better luminescent properties.
이와 같이 합성한 형광체를 청색 발광다이오드 위에 형성한 후 광특성을 측정하여 백색발광 효과가 확인되었다. 도 2는 백색 발광다이오드에서 나오는 발광스펙트럼으로부터 계산된 색좌표도 위치와 색온도를 나타낸 색도도이다. 도 2에 따르면 색온도는 형광체 조성 성분의 종류와 양에 따라서 변하며, 모결정에 포함되는 가돌리늄이 증가할수록 색 온도가 낮은 방향으로 이동하였다. 또한 인듐이 증가할수록 색온도가 높은 방향으로 이동하였다.The phosphor thus synthesized was formed on a blue light emitting diode, and then optical characteristics were measured to determine the white light emission effect. 2 is a chromaticity diagram showing a color coordinate position and a color temperature calculated from a light emission spectrum emitted from a white light emitting diode. According to FIG. 2, the color temperature changes according to the type and amount of the phosphor composition component, and the color temperature is shifted toward the lower direction as the gadolinium contained in the mother crystal increases. In addition, as the indium increased, the color temperature moved toward the higher direction.
따라서 백색광용 형광체 (Y1-xMx)3(Al1-yNy)5O12:R의 백색 발광 특성은 모결정의 M과 N의 종류와 R로 표현되는 활성제의 역할에 크게 영향을 받는다. 그러므로 청색 발광다이오드에 백색광용 형광체를 형성하여 백색 발광다이오드를 사용하고자 할 때는 M과 N의 종류와 R로 표현되는 활성제의 종류와 양을 적절하게 선택하면 된다. 따라서 도 3과 같이 납틀(3)위에 반사컵(1)을 설치하여 청색 발광다이오드(2)의 상부에 백색광용 형광체가 분산된 투명수지(5)를 형성시키고 다시 투명수지(6)로 에워싸서 전기에너지를 주어 작동시키면 안정한 백색광을 방출하는 발광다이오드에 응용되어질 수 있다.Therefore, the white light emission characteristics of the phosphor for white light (Y 1-x M x ) 3 (Al 1-y N y ) 5 O 12 : R greatly influences the kind of M and N of the mother crystal and the role of the activator represented by R. Receive. Therefore, when a white light emitting diode is formed on a blue light emitting diode and a white light emitting diode is to be used, the type and amount of M and N and the activator represented by R may be appropriately selected. Accordingly, as shown in FIG. 3, the reflective cup 1 is installed on the lead frame 3 to form a transparent resin 5 in which white light phosphors are dispersed on the blue light emitting diode 2, and then surrounded by the transparent resin 6 again. When applied with electrical energy, it can be applied to light emitting diodes emitting stable white light.
본 발명에 의하면 종래의 청·적·녹색 각각의 발광다이오드를 조합하여 조립되는 백색 발광 다이오드에 비하여 간단하면서도 안정적으로 고휘도의 백색광을 얻을 수 있으며, 이에 따라 본 발명에 의한 발광방법은 컴퓨터와 정보통신기기같은 전자제품에 효과적으로 적용될 수 있을 뿐만 아니라, 일반조명 분야에 까지 적용가능하다.According to the present invention, a white light having high brightness can be obtained simply and stably as compared to a white light emitting diode assembled by combining each of blue, red, and green light emitting diodes. Not only can be effectively applied to electronic products such as devices, but also to general lighting field.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100449140B1 (en) * | 2002-01-24 | 2004-09-22 | 서울반도체 주식회사 | White Light-emitting Diode and Method of Manufacturing the Same |
| KR100784573B1 (en) * | 2000-05-29 | 2007-12-10 | 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 | Luminaires emitting white light based on light emitting diodes |
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