KR100300317B1 - A blue light emitting phosphor - Google Patents

A blue light emitting phosphor Download PDF

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KR100300317B1
KR100300317B1 KR1019990007970A KR19990007970A KR100300317B1 KR 100300317 B1 KR100300317 B1 KR 100300317B1 KR 1019990007970 A KR1019990007970 A KR 1019990007970A KR 19990007970 A KR19990007970 A KR 19990007970A KR 100300317 B1 KR100300317 B1 KR 100300317B1
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phosphor
zns
phosphors
bamg
blue
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KR1019990007970A
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Korean (ko)
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KR20000059996A (en
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윤원호
박창원
송미란
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김순택
삼성에스디아이 주식회사
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
    • C09K11/582—Chalcogenides
    • C09K11/584—Chalcogenides with zinc or cadmium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • 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
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/7734—Aluminates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • 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
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • C09K11/7771—Oxysulfides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • 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
    • C09K11/7784—Chalcogenides
    • C09K11/7787—Oxides
    • C09K11/7789—Oxysulfides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

사람의 눈을 피로하게 하고 시력 저하를 유발시키는 자외선 영역에서의 발광을 감소시킨 청색 형광체를 제공하기 위한 것으로서, ZnS:Ag,Cl 형광체, 및 이 ZnS:Ag,Cl 형광체로부터 발생하는 자외선 영역의 빛을 흡수하는 BaMg2Al16O27:Eu 형광체, Y2O2S:Er 형광체 또는 Y2O2S:Dy 형광체를 포함하는 청색 형광체를 제공한다.The present invention provides a blue phosphor that reduces light emission in an ultraviolet region that causes a fatigue of the human eye and causes vision deterioration, and includes a ZnS: Ag, Cl phosphor and an ultraviolet region light generated from the ZnS: Ag, Cl phosphor. A blue phosphor including a BaMg 2 Al 16 O 27 : E phosphor, a Y 2 O 2 S: Er phosphor, or a Y 2 O 2 S: Dy phosphor that absorbs the same is provided.

Description

청색 형광체{A BLUE LIGHT EMITTING PHOSPHOR}Blue phosphor {A BLUE LIGHT EMITTING PHOSPHOR}

산업상 이용 분야Industrial use field

본 발명은 청색 형광체에 관한 것으로서, 더욱 상세하게는 시력 저하를 유발하는 자외선 영역의 발광을 감소시킨 청색 형광체에 관한 것이다.The present invention relates to a blue phosphor, and more particularly, to a blue phosphor that reduces the light emission of the ultraviolet region that causes vision loss.

종래 기술Prior art

청색 형광체인 ZnS:Ag,Cl 형광체는 색순도 및 휘도가 우수하므로음극선관(cathode ray tube) 등의 표시 장치에 널리 사용되고 있다.ZnS: Ag and Cl phosphors, which are blue phosphors, have excellent color purity and luminance, and thus are widely used in display devices such as cathode ray tubes.

도 1은 ZnS:Ag,Cl 형광체의 발광 스펙트럼을 나타낸 것으로 가시광선 영역인 400-500㎚ 파장대외에도 자외선 영역인 360-400㎚ 파장대에서 발광 피크(peak)가 나타남을 알 수 있다.Figure 1 shows the emission spectrum of the ZnS: Ag, Cl phosphor, it can be seen that the emission peak (peak) appears in the wavelength range of 360-400nm in addition to the 400-500nm wavelength range of visible light.

ZnS:Ag,Cl 형광체로부터 나오는 이 자외선 영역의 빛은 사람의 눈을 쉽게 피로하게 만들고, 시력을 저하시키는 문제점이 있으므로 이 형광체를 표시 장치에 적용하는 경우 인체에 유해하다는 문제점이 있다.Since the light in the ultraviolet region emitted from the ZnS: Ag, Cl phosphor makes the human eye easily tired and has a problem of deteriorating vision, there is a problem in that the phosphor is harmful to the human body when applied to the display device.

상기한 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 사람의 눈을 피로하게 하고 시력 저하를 유발하는 자외선 영역에서의 발광을 감소시킨 청색 형광체를 제공하는 것이다.SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a blue phosphor which reduces the light emission in the ultraviolet region that makes the human eye tired and causes a decrease in vision.

도 1은 ZnS:Ag,Cl 형광체의 발광 스펙트럼을 나타낸 그래프.1 is a graph showing emission spectra of ZnS: Ag, Cl phosphors.

도 2는 BaMg2Al16O27:Eu 형광체의 흡수 스펙트럼을 나타낸 그래프.2 is a graph showing absorption spectra of BaMg 2 Al 16 O 27 : E phosphors.

도 3은 BaMg2Al16O27:Eu 형광체의 발광 스펙트럼을 나타낸 그래프.3 is a graph showing an emission spectrum of BaMg 2 Al 16 O 27 : E phosphor.

도 4는 Y2O2S:Dy 형광체의 흡수 및 발광 스펙트럼을 나타낸 그래프.4 is a graph showing absorption and emission spectra of Y 2 O 2 S: Dy phosphors.

도 5는 Y2O2S:Er 형광체의 흡수 및 발광 스펙트럼을 나타낸 그래프.5 is a graph showing absorption and emission spectra of Y 2 O 2 S: Er phosphors.

도 6은 본 발명의 일 실시예 및 비교예에 따른 형광체의 발광 스펙트럼을 나타낸 그래프.Figure 6 is a graph showing the emission spectrum of the phosphor according to an embodiment and a comparative example of the present invention.

상기 본 발명의 목적을 달성하기 위하여, 본 발명은 ZnS:Ag,Cl 형광체와, BaMg2Al16O27:Eu 형광체, Y2O2S:Er 형광체 및 Y2O2S:Dy 형광체로 이루어진 군에서 선택되는 하나 이상의 형광체를 포함하는 청색 형광체를 제공한다.In order to achieve the object of the present invention, the present invention comprises a ZnS: Ag, Cl phosphor, BaMg 2 Al 16 O 27 : Eu phosphor, Y 2 O 2 S: Er phosphor and Y 2 O 2 S: Dy phosphor It provides a blue phosphor comprising at least one phosphor selected from the group.

이하, 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail.

ZnS:Ag,Cl 형광체로부터 나오는 자외선 영역의 빛을 여기원으로 하는 형광체를 선별한 결과, 포토 루미네센스(photo luminescense) 형광체인 BaMg2Al16O27:Eu 형광체가 도 2에서 보이는 바와 같이 자외선 영역에서 폭 넓은 흡수 밴드를 가진다는것을 알게 되었다. 더욱이, BaMg2Al16O27:Eu 형광체는 도 3에서 보이는 바와 같이 ZnS:Ag,Cl 형광체와 유사하게 400-500㎚ 파장대에서 청색 발광 피크를 나타냄을 알 수 있다. 그러므로, ZnS:Ag,Cl 형광체에 BaMg2Al16O27:Eu 형광체를 혼합하면, ZnS:Ag,Cl 형광체로부터 발생하는 자외선 영역의 빛을 BaMg2Al16O27:Eu 형광체가 여기원으로 사용하고, ZnS:Ag,Cl 형광체와 함께 청색을 발광한다.As a result of screening phosphors with excitation sources in the ultraviolet region emitted from ZnS: Ag, Cl phosphors, BaMg 2 Al 16 O 27 : Eu phosphors as photo luminescense phosphors are shown in FIG. It was found that they have a broad absorption band in the region. Furthermore, it can be seen that the BaMg 2 Al 16 O 27 : Eu phosphor exhibits a blue emission peak in the wavelength range of 400-500 nm similarly to the ZnS: Ag, Cl phosphor as shown in FIG. 3. Therefore, when the BaMg 2 Al 16 O 27 : Eu phosphor is mixed with the ZnS: Ag, Cl phosphor, the BaMg 2 Al 16 O 27 : Eu phosphor is used as the excitation source in the ultraviolet light generated from the ZnS: Ag, Cl phosphor. Then, blue light is emitted together with the ZnS: Ag, Cl phosphor.

또한, 도 4 및 도 5에서 보이는 바와 같이 캐소드 루미네센스(cathode luminescense) 형광체인 Y2O2S:Er 형광체, Y2O2S:Dy 형광체가 자외선 영역인 200-450㎚의 파장대에서 흡수 밴드를 가지며, ZnS:Ag,Cl 형광체와 동일한 파장대에서 청색 발광 피크를 가진다. 따라서, 이들 형광체를 ZnS:Ag,Cl 형광체에 혼합하면 ZnS:Ag,Cl 형광체로부터 발생하는 자외선 영역의 빛을 이들 형광체들이 여기원으로 사용하고 ZnS:Ag,Cl 형광체와 함께 청색을 발광한다.In addition, as shown in FIGS. 4 and 5, the Y 2 O 2 S: Er phosphor and the Y 2 O 2 S: Dy phosphor, which are cathode luminescense phosphors, are absorbed at a wavelength range of 200-450 nm. It has a band and has a blue emission peak in the same wavelength band as the ZnS: Ag, Cl phosphor. Therefore, when these phosphors are mixed with the ZnS: Ag, Cl phosphors, the phosphors in the ultraviolet region generated from the ZnS: Ag, Cl phosphors are used as excitation sources and emit blue light together with the ZnS: Ag, Cl phosphors.

ZnS:Ag,Cl 형광체에 혼합되는 BaMg2Al16O27:Eu 형광체, Y2O2S:Er 형광체 또는 Y2O2S:Dy 형광체의 양은 전체 청색 형광체의 1-50중량%인 것이 바람직하다. 이들 형광체의 함량이 1중량% 미만인 경우에는 ZnS:Ag,Cl 형광체로부터 발생하는 자외선 영역의 빛을 충분히 흡수할 수 없는 문제점이 발생하고, 이들 형광체의 함량이 50중량%를 초과하는 경우에는 목적하는 색좌표 즉, ZnS:Ag,Cl 형광체가 나타내는 색좌표가 이동되는 문제점이 발생한다.The amount of BaMg 2 Al 16 O 27 : E phosphor, Y 2 O 2 S: Er phosphor, or Y 2 O 2 S: Dy phosphor mixed with the ZnS: Ag, Cl phosphor is preferably 1-50% by weight of the total blue phosphor. Do. If the content of these phosphors is less than 1% by weight, there is a problem in that the light in the ultraviolet region generated from the ZnS: Ag, Cl phosphors cannot be sufficiently absorbed. If the content of these phosphors exceeds 50% by weight, The color coordinates, that is, the color coordinates represented by the ZnS: Ag and Cl phosphors are shifted.

상기한 바와 같이, ZnS:Ag,Cl 형광체에 BaMg2Al16O27:Eu 형광체, Y2O2S:Er 형광체 또는 Y2O2S:Dy 형광체를 혼합하는 방법외에도 ZnS:Ag,Cl 형광체 표면에 미립의 BaMg2Al16O27:Eu 형광체, Y2O2S:Er 형광체 또는 Y2O2S:Dy 형광체를 부착시키는 방법을 사용할 수 있다. 이때, 부착 방법으로는 젤라틴 등의 유기 바인더를 사용하여 형광체에 안료를 부착시키는 방법을 응용할 수 있다.As described above, in addition to the method of mixing BaMg 2 Al 16 O 27 : Eu phosphor, Y 2 O 2 S: Er phosphor, or Y 2 O 2 S: Dy phosphor with ZnS: Ag, Cl phosphor, ZnS: Ag, Cl phosphor A method of attaching particulate BaMg 2 Al 16 O 27 : E phosphor, Y 2 O 2 S: Er phosphor, or Y 2 O 2 S: Dy phosphor to the surface can be used. At this time, the method of applying the pigment to the phosphor using an organic binder such as gelatin can be applied as the method of attachment.

다음은 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시한다. 그러나 하기의 실시예들은 본 발명을 보다 쉽게 이해하기 위하여 제공되는 것일 뿐 본 발명이 하기의 실시예에 한정되는 것은 아니다.The following presents a preferred embodiment to aid the understanding of the present invention. However, the following examples are merely provided to more easily understand the present invention, and the present invention is not limited to the following examples.

실시예 1Example 1

ZnS:Ag,Cl 형광체에 BaMg2Al16O27:Eu 형광체를 혼합하여 청색 형광체를 제조하였다. 이때, BaMg2Al16O27:Eu 형광체의 사용량은 전체 형광체의 10중량%로 하였다.A blue phosphor was prepared by mixing a BaMg 2 Al 16 O 27 : Eu phosphor with a ZnS: Ag, Cl phosphor. At this time, the amount of BaMg 2 Al 16 O 27 : Eu phosphor used was 10% by weight of the entire phosphor.

실시예 2Example 2

실시예 1에서 BaMg2Al16O27:Eu 형광체의 사용량을 전체 형광체의 20중량%로 한 것을 제외하고는 실시예 1과 동일하게 실시하였다.Example 1 was carried out in the same manner as in Example 1 except that the amount of BaMg 2 Al 16 O 27 : Eu phosphor was used in an amount of 20% by weight of the entire phosphor.

실시예 3Example 3

실시예 1에서 BaMg2Al16O27:Eu 형광체의 사용량을 전체 형광체의 30중량%로 한 것을 제외하고는 실시예 1과 동일하게 실시하였다. 제조된 형광체의 발광 스펙트럼을 도 6에 나타내었다.Example 1 was carried out in the same manner as in Example 1 except that the amount of BaMg 2 Al 16 O 27 : Eu phosphor was used as 30% by weight of the whole phosphor. The emission spectrum of the prepared phosphor is shown in FIG. 6.

비교예 1Comparative Example 1

BaMg2Al16O27:Eu 형광체를 혼합하지 않은 ZnS:Ag,Cl 형광체를 사용하였으며, 이 형광체의 발광 스펙트럼을 도 6에 나타내었다.A ZnS: Ag, Cl phosphor not mixed with BaMg 2 Al 16 O 27 : Eu phosphor was used, and an emission spectrum of the phosphor is shown in FIG. 6.

도 6에서 보이는 바와 같이, 비교예 1과 비교하여 실시예 1의 경우 자외선 영역인 360-400㎚의 파장대에서의 발광이 약 50% 정도 감소되었음을 볼 수 있다.As shown in FIG. 6, compared to Comparative Example 1, in Example 1, light emission in the wavelength region of 360-400 nm, which is an ultraviolet region, may be reduced by about 50%.

본 발명에 따른 청색 형광체를 적용한 표시 장치는 기존의 ZnS:Ag,Cl 형광체를 적용시킨 표시 장치에 비해 시력 저하 및 눈의 피로도를 감소시킬 수 있다.The display device employing the blue phosphor according to the present invention can reduce visual acuity and eye fatigue compared to the conventional display device employing the ZnS: Ag, Cl phosphor.

Claims (1)

ZnS:Ag,Cl; 및ZnS: Ag, Cl; And BaMg2Al16O27:Eu, Y2O2S:Er 및 Y2O2S:Dy로 이루어진 군에서 선택되는 하나 이상의 물질 1 내지 50 중량%를 포함하는 청색 형광체.BaMg 2 Al 16 O 27 A blue phosphor comprising 1 to 50% by weight of one or more materials selected from the group consisting of Eu, Y 2 O 2 S: Er and Y 2 O 2 S: Dy.
KR1019990007970A 1999-03-10 1999-03-10 A blue light emitting phosphor KR100300317B1 (en)

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