JP2004335579A - Light emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting device which is capable of efficiently emitting red light of high brightness responding to the stimulation light having wavelengths of 350 to 420 nm, emitting a wide range of red light, excellent in color rendering, and capable of displaying a delicate tone more precisely with high reproducibility when the device is used together with a green light emitting fluorescent material and a blue light emitting fluorescent material, to enable a fluorescent material to emit white light or neutral colors as it receives the light emitted from a semiconductor light emitting element which emits the light having the above wavelengths. <P>SOLUTION: The light emitting device is equipped with a semiconductor light emitting element which is sealed in a sealing body and emits light having wavelengths of 350 to 420 nm. A red light emitting fluorescent material where tetravalent Mn serves as luminous ions and another red light emitting fluorescent material where trivalent Eu serves as luminous ions are dispersed into the sealing body. Furthermore, a fluorescent layer contains a red light emitting fluorescent material where tetravalent Mn serves as luminous ions, and another red light emitting fluorescent material where trivalent Eu serves as luminous ions, and is provided on the optical path of light emitted from the above semiconductor light emitting element. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a red-light-emitting phosphor that emits red light when excited by long-wavelength ultraviolet light or short-wavelength visible light at 350 to 420 nm, a method for manufacturing the same, and a light-emitting device using the red-light-emitting phosphor.
[0002]
[Prior art]
A light emitting diode (LED: Light Emitting Diode) is a semiconductor light emitting element that emits light, and converts electric energy into ultraviolet light, visible light, infrared light, and the like. For example, as a device utilizing visible light, there is a semiconductor light emitting device formed of a light emitting material such as GaP, GaAsP, GaAlAs, and an LED lamp in which these are sealed with a transparent resin or the like is widely used. In addition, display-type LED lamps in which a light-emitting material is fixed on the upper surface of a printed board or a metal lead and sealed with a transparent resin case in the shape of numerals or characters are also frequently used.
[0003]
In addition, since the light emitting diode is a semiconductor element, it has a long life, high reliability, and when used as a light source, the replacement work can be reduced. Therefore, portable communication devices, personal computer peripheral devices, OA devices, home use devices, and the like. It is widely used as a component of electrical equipment, audio equipment, various switches, light sources for backlights, various display devices such as bulletin boards, and the like.
[0004]
Such an LED lamp can change the color of light emitted from the LED lamp by including various kinds of phosphor powder in a transparent resin for encapsulating the semiconductor light emitting element. Accordingly, it is possible to obtain a wide range of colors in the visible light range from blue to red.
[0005]
However, recently, the demands of consumers for the colors of the above-mentioned various display devices have increased, and the display devices have been required to have a performance capable of reproducing a delicate color more precisely, and a single LED lamp has been used to produce white and various intermediate colors. There is a strong demand for light to be emitted.
[0006]
Therefore, by applying various red, green, and blue phosphors to the surface of the semiconductor light emitting element of the LED lamp, or by including the various phosphors in a sealing material, a coating material, and the like of the LED lamp, 1 Attempts have also been made to configure white LED and various intermediate colors with a single LED lamp.
[0007]
Among such phosphors, a phosphor excited by long wavelength ultraviolet or short wavelength visible radiation (350 to 420 nm), currently, as being mainly used, the emission color is blue BaMg ₂ Al ₁₆ O ₂₇ : Eu, (Sr, Ca, Ba) ₅ (PO ₄ ) ₃ Cl: Eu, emission color of green BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn, Zn ₂ GeO ₄ : Mn, emission color of red _{Y 2 O 2 S: Eu,} La 2 O 2 S: Eu, 3.5MgO · 0.5MgF 2 · GeO 2: Mn include, obtain the emission color of a wide range by using these light emitting phosphor suitably be able to.
[0008]
However, the red light-emitting phosphor has a problem in that light emission for long-wavelength ultraviolet light and short-wavelength visible light (350 to 420 nm) is weaker than blue and green light-emitting phosphors.
[0009]
Therefore, when a white light emission color is obtained using light of these wavelengths, it is necessary to increase the proportion of the red light emitting phosphor, which increases the cost, and the white light emission color is red, green, Since it is possible to obtain white light by adjusting the balance of the amount of blue light emission, in order to obtain a white light emission color, the amount of green and blue light emission must be reduced in accordance with the amount of red light emission. In addition, since the amount of phosphor used has an upper limit, the amount of emitted white light is reduced, and there is a problem that high-luminance white cannot be obtained.
[0010]
Further, the wavelength corresponding to the excitation energy of the electron pair of the oxide compound is in the ultraviolet region, and the wavelengths of long-wavelength ultraviolet light and short-wavelength visible light (350 to 420 nm) overlap with the absorption edge of the phosphor. The light emitting phosphor also has a problem that when the emission wavelength peak of the semiconductor light emitting element fluctuates, the light emission amount of the phosphor changes remarkably.
[0011]
To solve this problem, rare earth oxysulfide phosphors activated with europium have been proposed in JP-A-11-246857 (Patent Document 1) and JP-A-2000-144130 (Patent Document 2). It has been reported that the excitation wavelength of such a phosphor is shifted to a longer wavelength side.
[0012]
However, even with these red light-emitting phosphors, the absorption intensity on the longer wavelength side than 350 nm sharply decreases as the wavelength becomes longer, and an excitation light source having an emission peak at 350 to 342 nm, for example, an ultraviolet LED as an excitation light source. When used, the emission amount of the phosphor is significantly changed due to the fluctuation of the emission wavelength of the LED, which is inevitable in manufacturing, that is, the wavelength of the excitation light. This is because when displaying white or neutral colors in combination with green and blue light-emitting phosphors, the color will vary, so the conventional red light-emitting phosphor must reproduce subtle colors more precisely. Was difficult.
[0013]
In addition, since the red light-emitting phosphor emits light due to 4f-4f transition of trivalent Eu ions (Eu ³⁺ ), the light emission has a narrow spectrum width of about 610 to 630 nm. In particular, there is a problem that the color rendering properties are inferior because the spectrum on the longer wavelength side than 640 nm is insufficient.
[0014]
[Patent Document 1]
JP-A-11-246857 [Patent Document 2]
JP 2000-144130 A
[Problems to be solved by the invention]
The present invention has been made to solve the above problems, and a light emitting device, a green light emitting phosphor, and a blue light emitting phosphor capable of efficiently emitting red light with high luminance with respect to excitation light having a wavelength of 350 to 420 nm. It is an object of the present invention to provide a light-emitting device that can efficiently display white or intermediate colors with high luminance and good color rendering in combination with a body.
[0016]
Means for Solving the Problems and Embodiments of the Invention
The present inventor has conducted intensive studies to solve the above problems, and as a result, a light emitting device in which a semiconductor light emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material. A red-emitting phosphor in which tetravalent Mn (Mn ⁴⁺ ) emits light by being excited by light of the above-mentioned wavelength and a red-emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light-emitting ion is dispersed in the material. Light-emitting device, or a light-emitting device in which a semiconductor light-emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material. Light emission provided with a fluorescent layer containing a red light-emitting phosphor in which tetravalent Mn (Mn ⁴⁺ ) emits light when excited by light and a red light-emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light-emitting ion. If the device is The absorption spectrum of the n ^{(Mn 4+) _{ion, 4 A 2 (t 2 3}} ) in the near-ultraviolet region from the visible ^{_{→ 4 T 1, 4 T 2}} (t 2 2 e) strong absorption bands corresponding to the spin allowed transition is Yes, it emits red light efficiently and with high luminance with respect to excitation light having a wavelength of 350 to 420 nm, and emits red light at a wavelength different from that of trivalent Eu (Eu ³⁺ ). By using Eu (Eu ³⁺ ) as a light-emitting ion together with a red light-emitting phosphor, a light-emitting device having good color rendering properties capable of emitting light in a wide red range can be obtained. A light-emitting device that emits red light with a stable intensity over a range of wavelengths. In particular, when used in combination with a green light-emitting phosphor and / or a blue light-emitting phosphor, it can efficiently emit white or intermediate colors with high luminance, and can be excited. light In the case of displaying white or neutral colors by emitting light from a semiconductor light emitting element that emits light of the above-described wavelength in combination with a green light-emitting phosphor and a blue light-emitting phosphor because the phosphor is hardly affected by wavelength fluctuation. It has been found that subtle shades can be displayed more precisely and with good reproducibility.
[0017]
That is, the present invention
[1] A light-emitting device in which a semiconductor light-emitting element which emits light having a wavelength of 350 to 420 nm is sealed in a sealing material, wherein the sealing material emits light when excited by light having the wavelength. A light emitting device, wherein a red light emitting phosphor in which Mn (Mn ⁴⁺ ) forms a light emitting ion and a red light emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light emitting ion are dispersed;
[2] The light emitting device according to [1], further comprising a green light emitting phosphor and / or a blue light emitting phosphor dispersed therein.
[3] A light-emitting device in which a semiconductor light-emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material, and the light having the wavelength is provided on an optical path of light emitted from the semiconductor light-emitting element. A fluorescent layer containing a red light-emitting phosphor in which tetravalent Mn (Mn ⁴⁺ ) emits light by being excited by the above and a red light-emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light-emitting ion. Light emitting device,
[4] The light emitting device according to [3], further comprising a green light emitting phosphor and / or a blue light emitting phosphor.
[5] The light emitting device according to [3] or [4], wherein a fluorescent layer is provided on the semiconductor light emitting element or the sealing material.
[6] The light-emitting device according to any one of [3] to [5], wherein the phosphor layer is formed by dispersing the red light-emitting phosphor in a resin, rubber, elastomer, or glass.
[7] The red-emitting phosphor in which the tetravalent Mn (Mn ⁴⁺ ) forms a light-emitting ion is 0.5MgF ₂ .3.5MgO.GeO ₂ : Mn, Mg ₂ TiO ₄ : Mn, α-Al ₂ O ₃ : Mn, LiAl ₅ O ₈ : Mn, Mg ₆ As ₂ O ₁₁ : Mn or 6MgO · As ₂ O ₅ : Mn, the light emitting device according to any one of [1] to [6], And [8] the red-emitting phosphor in which the trivalent Eu (Eu ³⁺ ) forms a luminescent ion is Y ₂ O ₂ : Eu, La ₂ O ₂ S: Eu or LiEuW ₂ O _8. The light-emitting device according to any one of items [1] to [7] is provided.
[0018]
Hereinafter, the present invention will be described in more detail.
First, a first embodiment of the light emitting device of the present invention will be described. The optical device of the first aspect is a light emitting device in which a semiconductor light emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material, and the sealing material is excited by light of the wavelength. A red light emitting phosphor in which tetravalent Mn (Mn ⁴⁺ ) emits light and forms a light emitting ion and a red light emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light emitting ion are dispersed.
[0019]
Examples of red-emitting phosphor which the tetravalent Mn ^{(Mn 4+)} forms a luminescent ions, for _{example, 0.5MgF 2 · 3.5MgO · GeO 2} : Mn, Mg 2 TiO 4: Mn, α-Al 2 O 3 : Mn, LiAl ₅ O ₈ : Mn, Mg ₆ As ₂ O ₁₁ : Mn or 6MgO · As ₂ O ₅ : Mn, etc., as a red light-emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light-emitting ion, Y _{2 O 2: Eu, La 2} O 2 S: Eu, include such LiEuW ₂ O _8, these tetravalent Mn red-emitting phosphor ^{(Mn 4+)} forms a luminescent ion and trivalent Eu ^{(Eu 3+)} It is possible to change the subtle hue of the red light by changing the ratio of the red light emitting phosphor to the light emitting phosphor that forms the light emitting ions.
[0020]
More specifically, as shown in FIG. 1, such a light emitting device includes leads 1 and 2, a semiconductor light emitting element 3 which emits light having a wavelength of 350 to 420 nm, and a semiconductor light emitting element 3 and a lead 2. A so-called shell-type light emitting diode having a structure in which lead wires 4 to be electrically connected are sealed in a shell shape with a sealing material 5, and a box-shaped light emitter housing member having an open top surface as shown in FIG. 6, a pair of leads 1 and 2 extend to the outside of the light-emitting member accommodating member 6, and inside the light-emitting member accommodating member 6, a semiconductor light-emitting element 3 and a thin lead wire 4 that emit light having a wavelength of 350 to 420 nm are provided. , 4 are connected to each other, and the light having the above-mentioned wavelength is introduced into a sealing material 5 such as a so-called chip-type light emitting diode having a structure in which the inside of the luminous body housing member 6 is sealed with the sealing material 5. Tetravalent Mn that emits light when excited (Mn ⁴⁺ ) is a red light-emitting phosphor in which a luminescent ion is formed and a trivalent Eu (Eu ³⁺ ) is a red light-emitting phosphor in which a luminescent ion is dispersed.
[0021]
In this case, if only the above-described red light emitting phosphor of the present invention is dispersed in the sealing material 5, a light emitting device that emits red light with high luminance is obtained, and BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn, Zn ₂ GeO. ₄ : a green light-emitting phosphor such as Mn, or a blue phosphor such as BaMg ₂ Al ₁₆ O ₂₇ : Eu, (Sr, Ca, Ba) ₅ (PO ₄ ) ₃ Cl: Eu. The light emitting device emits white light or intermediate colors.
[0022]
Note that this light emitting device can be manufactured by mixing a sealing material such as resin, rubber, elastomer, and glass with a phosphor and sealing the semiconductor light emitting element and the like. In particular, when a plurality of types of phosphors are used, the red light-emitting phosphor of the present invention, when compared with a general phosphor, has a higher true specific gravity and sediments faster than other phosphors when mixed with a sealing material. May cause uneven color. Therefore, the red light-emitting phosphor of the present invention has a high viscosity, for example, a silicone rubber composition whose viscosity is adjusted with a thixotropic modifier, a silicone resin composition, or the like, and is mixed with a silicone resin composition. It is preferable to disperse them in In addition, a pigment, a dye, a pseudo-pigment, or the like may be added to the sealing material in addition to the above-described phosphor as a color tone conversion material.
[0023]
Next, a second embodiment of the light emitting device of the present invention will be described. The light-emitting device according to the second aspect is a light-emitting device in which a semiconductor light-emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material. A fluorescent layer containing the above-described red light emitting phosphor of the present invention is provided on a road.
[0024]
Examples of red-emitting phosphor which the tetravalent Mn ^{(Mn 4+)} forms a luminescent ions, for _{example, 0.5MgF 2 · 3.5MgO · GeO 2} : Mn, Mg 2 TiO 4: Mn, α-Al 2 O 3 : Mn, LiAl ₅ O ₈ : Mn, Mg ₆ As ₂ O ₁₁ : Mn or 6MgO · As ₂ O ₅ : Mn, etc., as a red light-emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light-emitting ion, Y _{2 O 2: Eu, La 2} O 2 S: Eu, include such LiEuW ₂ O _8, these tetravalent Mn red-emitting phosphor ^{(Mn 4+)} forms a luminescent ion and trivalent Eu ^{(Eu 3+)} It is possible to change the delicate hue of red light by changing the ratio of the red light emitting phosphor to light emitting ions.
[0025]
More specifically, such a light emitting device includes, for example, a device in which a fluorescent layer containing the red light emitting phosphor of the present invention is provided on a semiconductor light emitting element or a sealing material. The leads 1 and 2, the semiconductor light emitting element 3 that emits light having a wavelength of 350 to 420 nm, and the thin lead wire 4 that electrically connects the semiconductor light emitting element 3 and the lead 2 as shown in FIG. A structure in which a phosphor layer 7 is provided on a semiconductor light-emitting element 3 of a so-called shell-type light-emitting diode and sealed together with the semiconductor light-emitting element 3 and the like having a shell-sealed structure, as shown in FIG. A pair of leads 1 and 2 are extended from the inner bottom of the box-shaped luminous body housing member 6 to the outside of the luminous body housing member 6, and light having a wavelength of 350 to 420 nm is emitted inside the luminous body housing member 6. Semiconductor light emitting element 3 and fine lead wires 4 and 4 A phosphor layer 7 is provided on a semiconductor light emitting element 3 of a so-called chip type light emitting diode having a structure in which the light emitting body housing member 6 is sealed with a sealing material 5 by connecting and connecting them. As shown in FIG. 6, a sealing layer of a shell type light emitting diode as shown in FIG. An example in which a fluorescent layer 7 is provided on a sealing material 5 of a chip-type light emitting diode is given. The configuration other than the fluorescent layer in FIGS. 5 and 6 is the same as the configuration shown in FIGS.
[0026]
Further, the fluorescent layer is not limited to a so-called transmissive type in which the fluorescent layer is provided inside the light emitting diode or adjacent to the light emitting diode as described above, and the fluorescent layer 7 is separated from the light emitting diode 8 as shown in FIG. A so-called reflection type light emitting device that is provided at a position and reflects light emitted from the fluorescent layer by the reflection plate 9 may also be used. Further, the fluorescent layer of the light emitting device in which the fluorescent layer is provided on the sealing material as shown in FIGS. 5 and 6 can be further sealed with the sealing material.
[0027]
In this case, if only the above-described red light-emitting phosphor of the present invention is dispersed in the fluorescent layer, a light-emitting device that emits red light with high luminance is obtained, and BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn, Zn ₂ GeO ₄ : If dispersed together with a blue light-emitting phosphor such as Mn or a blue phosphor such as BaMg ₂ Al ₁₆ O ₂₇ : Eu or (Sr, Ca, Ba) ₅ (PO ₄ ) ₃ Cl: Eu, high brightness white or The light emitting device emits a neutral color.
[0028]
When the fluorescent layer is provided on the semiconductor light emitting element, the fluorescent substance may be used as it is or may be used by mixing with a binder. In this case, as shown in FIGS. 3 and 4, the fluorescent layer is sealed in a sealing material together with the semiconductor light emitting element.
[0029]
On the other hand, when the fluorescent layer is provided on the sealing material, it is preferable to use the red light-emitting phosphor dispersed in a translucent resin, rubber, elastomer, or glass, particularly, silicone resin or silicone rubber. In particular, when a plurality of types of phosphors are dispersed in the phosphor layer, a silicone rubber composition whose viscosity is adjusted with a thixotropic regulator, a silicone resin, as in the case where the red light-emitting phosphor of the present invention is dispersed in the sealing material described above. It is preferable that the composition is mixed with a composition or the like and dispersed in the fluorescent layer by a method of curing the composition. Further, the fluorescent layer may be a layer in which a phosphor is mixed, or a layer in which the phosphor is divided into several layers. In addition, a pigment, a dye, a pseudo-pigment, or the like may be added to the phosphor layer in addition to the phosphor described above as a color tone conversion material.
[0030]
【Example】
Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to the following Examples.
[0031]
[Example 1]
As a red-emitting _{phosphor, 0.5MgF 2 · 3.5MgO · GeO 2} : Mn, Y 2 O 2: Eu, as a blue emitting phosphor _{(Sr, Ca, Ba) 5} (PO 4) 3 Cl: Eu, green A silicone rubber sheet (thickness: BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn) mixed and dispersed in silicone rubber at a ratio of 5: 10: 1: 1 as shown in FIG. 0.5 mm) using a heating press machine, and this was covered on a sealing material of an ultraviolet LED having an emission wavelength of 380 nm to obtain a light emitting device as shown in FIG. 6 as a fluorescent layer.
[0032]
The light emitting device was turned on by passing a current of 20 mA through the integrating sphere, and the spectral distribution of the obtained light was measured with a spectral radiance meter PR-704 (manufactured by Photo Research). FIG. 8 shows the spectral distribution. The chromaticity of this light emitting device was white with x = 0.3542 and y = 0.3517. Further, as shown in FIG. 8, light emission at 630 nm from Y ₂ O ₂ : Eu and light emission at 662 nm from 0.5MgF ₂ .3.5MgO.GeO ₂ : Mn were confirmed from this spectral distribution, and red light was emitted. It was confirmed that the area was wide.
[0033]
[Example 2]
A light emitting device was obtained in the same manner as in Example 1 except that Mg ₂ TiO ₄ : Mn was used instead of 0.5MgF ₂ .3.5 MgO.GeO ₂ : Mn, and the light obtained from the light emitting device was dispersed. When the distribution was measured, light emission of 630 nm by Y ₂ O ₂ : Eu and light emission of 659 nm by Mg ₂ TiO ₄ : Mn were confirmed, and it was confirmed that red light had a wide light-emitting region.
[0034]
【The invention's effect】
As described above, the light-emitting device of the present invention is a light-emitting device that can efficiently emit red light with high luminance with respect to excitation light having a wavelength of 350 to 420 nm and emit light in a wide red region, and has good color rendering properties.
[0035]
The light-emitting device of the present invention is a light-emitting device that emits red light with stable intensity over a wide range of wavelengths from long-wavelength ultraviolet light to short-wavelength visible light, and particularly a green light-emitting phosphor and / or blue light. When used in combination with a luminescent phosphor, white or neutral colors can be efficiently emitted with high luminance and are less susceptible to fluctuations in the wavelength of the excitation light. When a white or intermediate color is displayed by causing the phosphor to emit light using light from a semiconductor light emitting element that emits light, a delicate color tone can be displayed more precisely and with good reproducibility.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of an optical device of the present invention, and is a cross-sectional view showing a light emitting device in which a red light emitting phosphor of the present invention is dispersed in a sealing material for a bullet-shaped light emitting diode.
FIG. 2 is a view showing an example of the optical device of the present invention, and is a cross-sectional view showing a light emitting device in which the red light emitting phosphor of the present invention is dispersed in a sealing material for a chip type light emitting diode.
FIG. 3 is a view showing an example of the optical device of the present invention, and is a cross-sectional view showing a light emitting device in which a fluorescent layer containing the red light emitting phosphor of the present invention is provided on a semiconductor light emitting element of a shell type light emitting diode; .
FIG. 4 is a view showing an example of the optical device of the present invention, and is a cross-sectional view showing a light emitting device in which a fluorescent layer containing the red light emitting phosphor of the present invention is provided on a semiconductor light emitting element of a chip type light emitting diode; .
FIG. 5 is a diagram showing an example of the optical device of the present invention, and is a cross-sectional view showing a light emitting device in which a phosphor layer containing the red light emitting phosphor of the present invention is provided on a sealing material of a bullet-shaped light emitting diode; .
FIG. 6 is a view showing an example of the optical device of the present invention, and is a cross-sectional view showing a light emitting device in which a fluorescent layer containing the red light emitting phosphor of the present invention is provided on a sealing material for a chip type light emitting diode; .
FIG. 7 is a cross-sectional view illustrating an example of the optical device of the present invention, in which a fluorescent layer is provided at a position separated from a light emitting diode and reflects light emitted from the fluorescent layer.
FIG. 8 is a diagram illustrating a spectral distribution of emitted light of the light emitting device according to the first embodiment.
[Explanation of symbols]
1, 2 lead 3 semiconductor light emitting element 4 lead thin wire 5 sealing material 6 luminous body accommodation member 7 fluorescent layer 8 light emitting diode 9 reflector

Claims (8)

A light-emitting device in which a semiconductor light-emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material, wherein tetravalent Mn ( A light emitting device characterized by dispersing a red light emitting phosphor in which Mn ⁴⁺ ) forms a light emitting ion and a red light emitting phosphor in which trivalent Eu (Eu ³⁺ ) forms a light emitting ion. 2. The light emitting device according to claim 1, further comprising a green light emitting phosphor and / or a blue light emitting phosphor dispersed therein. A light emitting device in which a semiconductor light emitting element that emits light having a wavelength of 350 to 420 nm is sealed in a sealing material, wherein the semiconductor light emitting element is excited by light of the wavelength on an optical path of light emitted from the semiconductor light emitting element. And a phosphor layer containing a red light-emitting phosphor in which tetravalent Mn (Mn ⁴⁺ ) emits light as a light-emitting ion and a red light-emitting phosphor in which trivalent Eu (Eu ³⁺ ) emits a light-emitting ion. Light emitting device. The light emitting device according to claim 3, further comprising a green light emitting phosphor and / or a blue light emitting phosphor. The light emitting device according to claim 3, wherein a fluorescent layer is provided on the semiconductor light emitting element or the sealing material. The light emitting device according to any one of claims 3 to 5, wherein the phosphor layer is formed by dispersing the red light emitting phosphor in a resin, rubber, elastomer, or glass. The red light-emitting phosphor in which the tetravalent Mn (Mn ⁴⁺ ) forms a light-emitting ion is 0.5MgF ₂ .3.5MgO.GeO ₂ : Mn, Mg ₂ TiO ₄ : Mn, α-Al ₂ O ₃ : Mn, LiAl The light emitting device according to claim 1, wherein the light emitting device is ₅ O ₈ : Mn, Mg ₆ As ₂ O ₁₁ : Mn, or 6MgO · As ₂ O ₅ : Mn. _{8. The} red light emitting phosphor in which the trivalent Eu (Eu ³⁺ ) forms a light emitting ion is Y ₂ O ₂ : Eu, La ₂ O ₂ S: Eu or LiEuW ₂ O _8. The light emitting device according to any one of claims 1 to 7.

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