Phosphor, method for producing same, light emitting device, and image display device

A technology of phosphors and elements, which is applied in the field of phosphors and can solve problems such as easy decline in the brightness of phosphors

Active Publication Date: 2014-10-01
NAT INST FOR MATERIALS SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a result of exposure of the phosphor to the above-mentioned excitation source, the brightness of the phosphor tends to decrease, so it is desired to obtain a phosphor that does not decrease in brightness.

Method used

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  • Phosphor, method for producing same, light emitting device, and image display device
  • Phosphor, method for producing same, light emitting device, and image display device
  • Phosphor, method for producing same, light emitting device, and image display device

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preparation example Construction

[0213] The preparation method of such a phosphor of the present invention is not particularly limited. For example, by burning, that is, in an inert atmosphere environment containing nitrogen, in a temperature range of 1200° C. or more and 2200° C. or less, the following Li 1 Ba 2 al 1 Si 7 N 12 A mixture of metal compounds whose crystals are matrix crystals and inorganic compounds in which activating ions M are solid-dissolved is burned. The main crystals of the present invention are orthorhombic and belong to the space group Pnnm, but depending on the synthesis conditions such as the firing temperature, crystals having different crystal systems or space groups may be mixed in. In this case, due to Since the change in emission characteristics is small, it can be used as a high-brightness phosphor.

[0214]As a starting material, for example, a mixture of metal compounds, a compound containing Li, a compound containing M, a compound containing A, a compound containing D, ...

Embodiment 16

[0301] Figure 6 It is a schematic diagram which shows the lighting fixture (cannonball type LED lighting fixture) of this invention.

[0302] make Figure 6 Shown is a so-called cannonball-shaped white LED lamp (1). There are two wires (2, 3), one of which (2) has a recess, and an ultraviolet light-emitting diode element (4) with a luminescence peak at 365nm is placed. The lower electrode of the ultraviolet light emitting diode element (4) is electrically connected with the bottom surface of the concave part through a conductive matrix, and the upper electrode is electrically connected with another wire (3) through a metal wire (5). Phosphor (7) is dispersed in the resin and mounted near the light emitting diode element (4). The first resin (6) in which the phosphor is dispersed is transparent and covers the entirety of the ultraviolet light emitting diode element (4). The leading end portion of the wire including the concave portion, the purple light emitting diode eleme...

Embodiment 17

[0305] Figure 7 It is a schematic diagram showing the lighting fixture (board-mounted LED lighting fixture) of the present invention.

[0306] make Figure 7 The chip-type white light-emitting diode lamp (11) for substrate mounting is shown. Two wires (12, 13) are fixed on the white alumina ceramic substrate (19) with high visible light reflectance, one end of these wires is located in the approximate center of the substrate, and the other ends are respectively exposed to the outside. Welded electrodes. One (12) of the wires is placed and fixed with a blue light emitting diode element (14) having a light emission peak wavelength of 450nm in such a manner that one end thereof becomes the central part of the substrate. The lower electrode of the blue light-emitting diode element (14) is electrically connected to the lower wire through a conductive matrix, and the upper electrode is electrically connected to another wire (13) through a bonding wire (15).

[0307] Mix the fir...

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Abstract

The invention provides a phosphor which is chemically and thermally stable and has high luminous intensity even in cases where the phosphor is combined with an LED of 470 nm or less. A phosphor of the present invention contains: a crystal that is represented by Li1Ba2Al1Si7N12 and contains Li element, an element A, an element D, an element E and an element X (A represents at least one element selected from among Mg, Ca, Sr, Ba, Sc, Y and La; D represents at least one element selected from among Si, Ge, Sn, Ti, Zr and Hf; E represents at least one element selected from among B, Al, Ga and In; and X represents at least one element selected from among O, N and F); a crystal that is represented by (Li, A)3(D, E)8X12; an inorganic crystal that has the same crystal structure as a crystal that is represented by Li1Ba2Al1Si7N12; or an inorganic compound wherein an element M (M represents at least one element selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy and Yb) is solid-solved in one of the above-mentioned solid solution crystals.

Description

technical field [0001] The present invention relates to phosphor, its preparation method and its use. The phosphor contains at least Li element, A element, D element, and X element (A is one or more elements selected from Mg, Ca, Sr, Ba, Sc, Y, La; D is selected from Si , Ge, Sn, Ti, Zr, Hf one or more elements; E is at least one element selected from B, Al, Ga, In; X is at least one element selected from O, N, F element) from Li 1 Ba 2 al 1 Si 7 N 12 The crystal shown (solid solution crystallization), with Li 1 Ba 2 al 1 Si 7 N 12 Inorganic crystals of the same crystalline structure as the crystals shown (for example, by (Li,A) 3 (D,E) 8 x 12 In the crystal shown above), M element (where M is one or two or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is dissolved in an inorganic compound. Background technique [0002] Phosphors are used in vacuum fluorescent display (VFD (Vacuum-Fluorescent Display)), field emission display (FED (Field E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/08C09K11/59C09K11/79C09K11/80H01L33/50H01J1/63
CPCC09K11/7721H01L2224/8592H01L2924/0002C09K11/7706H01L2224/45144C09K11/0883H01L33/502H01L2224/48091H01L2224/48247C09K11/7734C09K11/7728H01L2924/12044H01L2924/181C09K11/77928C09K11/77218C09K11/77348H01L2924/00014H01L2924/00H01L2924/00012C09K11/64H10K50/80H01S5/10
Inventor 广崎尚登武田隆史舟桥司朗成松荣一郎
Owner NAT INST FOR MATERIALS SCI
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