KR20100094434A - Luminescent material - Google Patents

Abstract

PURPOSE: A luminescent material is provided to have a wide range of a color temperature and excellent color rendition, to improve luminescent properties, and to obtain superior resistance to water, moisture, and a polar solvent. CONSTITUTION: A luminescent material for exciting ultraviolet light or visible light includes europium(Eu) as an activator and a compound containing a divalent copper ion as a host lattice component. The compound is a phosphate-based compound. The compound converts the wavelength of initial ultraviolet light or initial blue light into light of visible light spectrum having a color rendering index of more than 90.

Description

Luminescent material

The present invention relates to a fluorescent material having a rare earth component, and more particularly to a light emitting material for ultraviolet and / or visible light excitation comprising a compound containing lead and / or copper activated by the rare earth component. .

Taking low-pressure mercury lamps as examples, lead-activated materials, namely lead-activated barium disilicate (Keith H. Butler, The Pennsylvania State University Press, 1980, S 175), orthosilicate, Keith H. Butler, the Pennsylvania State University Press , 1980, S 181), or marker every night (akermanites), or a calcium activated by Pb ^{2 +} - a metasilicate (Ca-metasilicate), etc. are used for short wavelength here.

The maximum emission band of the phosphor activated with lead is typically 290 nm to 370 nm at 254 nm excitation conditions. Therefore, barium disilicate activated by lead is currently employed in natural light lamps installed in living rooms or terraces as phosphors for ultraviolet (UV) light.

Lead has two appliances in the ground state ( ¹ S ₀ ). The ground state is classified as d ¹⁰ s ² , and in the lowest excited state, it has a structure of d ¹⁰ sp. The excited sp structure has an energy state represented by four energy levels, that is, ³ P ₀ , ³ P ₁ , ³ P ₂ and ¹ P ₁ , which are 104.88 nm ( ¹ P ₁ ) to 165.57 nm ( ³ ) by free ions. P ₀ ) can provide wavelength in the range band. The transition between ¹ S ₀ and ¹ P ₁ (energy level change) is achievable with all selection rules. However, a transition between ¹ S ₀ and ³ P ₀ is only possible with the lowest symmetry, while a transition between ¹ S ₀ and ³ P ₁ and ³ P ₂ can only be made under certain conditions. Excitation in the range of 180 nm to 370 nm has the same luminescence properties. However, excitation with wavelengths longer than 370 nm is not possible.

On the other hand, some light emitting materials contain lead as a host lattice component. For example, molybdate phosphors containing MoO ₄ ^{2 -} as a central structure, introduced in 1995 (Bernhardt, HJ, Phys. Stat. Sol. (A), 91,643, 1985) ). PbMoO ₄ emits red light having a maximum emission peak of 620 nm under 360 nm excitation conditions at room temperature of about 20 ° C.

However, luminescence in molybdate is not only achieved by lead itself. In other words, the luminescence property in molybdate is not determined by the metal ion M ^{2 +} (M ^{2 +} MoO ₄ , where M ^{2 +} can be replaced by Ca, Sr, Cd, Zn, Ba, Pb, etc.). . This MoO ₄ ^2- ions in the center of the defect (defect centers) the O ^{2 -} seems to be because the combination with ion bacon cities. Nevertheless, since the Pb ^{2 +} ions to stabilize the host lattice, it is possible to indicate a good luminescence property.

As a non-trivial example, crystal-containing tungstates (Ca, Pb) WO ₄ exhibit strong green luminescence with high quantum output of at least 75% (Blasse, G., Radiationless processes in luminescent materials, in Radiationless Processes) , Dibartolo, B., Ed.Plenum Press, New york, 1980, 287). PbWO ₄ emits blue color at 250 nm excitation and PbWO ₄ has orange emission band at 313 nm excitation. This result can be caused by Schottky defects or impurity ions (Phosphor Handbook, edited under the Auspice f phosphor Research Society, CRC Press New York, 1998, S 205).

On the other hand, copper is used as a monovalent activator in orthophosphates having a maximum emission peak of 490 nm (Wanmaker, WL and Bakker, C., J. Elhem. Soc., 106, 1027, 1959). The monovalent copper in the ground state 1SO is filled with the energy shell 3d ¹⁰ . That is, ¹ S ₀ level. On the other hand, this minimum after this structure is 3d ⁹ 4s, its structure is represented by two types i.e., D ³ and D ^1. The next higher excitation structure is 3d ⁹ 4p and has six forms: ³ P ⁰ , ³ F ⁰ , ³ D ⁰ , ¹ F ⁰ , ¹ D ⁰ or ¹ P ⁰ . Energy transitions between ground state ¹ S ₀ and ¹ D or ³ D are not allowed by parity or spin. In copper ions, excitation to the crystal field level of 4p is allowed. Luminescence (emission) is the ground state from the crystal field odd state if returned directly to the ground state from the (odd state), or the first odd transitions coupled to the crystal field levels from state ³ D or of the 3d ⁹ 4 gujo ¹ D state 2 It is obtained when there is a difference transition.

Bivalent copper has 3d ⁹ the structure in the ground state, wherein the level _² D _^5/2. In divalent copper, one of the d electrons can be excited by 4s or 4p orbital. The electron arrangement of the lowest excitation structure is in the form of 3d ⁸ 4s with two quartet ⁴ F, ⁴ P and four doublets ² F, ² D, ² P, and ² G, due to the forbidden transition Luminescence is not induced. The higher excitation structure has 3D ⁸ 4p electron arrangements with ⁴ types, i.e. ⁴ D ⁰ , ⁴ G ⁰ , ⁴ F ⁰ , and ⁴ P ⁰ , and light emission occurs.

It is well known that sulfide-phosphors activated by copper acting as activators or coactivators are commercially used in cathode ray tubes. Green light-emitting ZnS: Cu, Al (where Cu is used as an activator and Al is used as a co-activator) are very important for CRT applications.

In zinc-sulphide phosphors, luminescent materials can be classified into five types according to the concentration ratios of the active and auxiliary activators (van Gool, W., Philips Res. Rept. Suppl., 3, 1, 1962). Here, the emission center is formed by deep donors or deep acceptors, or by their association in adjacent positions (Phosphor Handbook, edited under the Auspice of Phosphor Research Society, CRC). Press New York, 1988, S. 238).

Orthophosphates, Wanmaker, WL, and Spier, HL, JECS 109 (1962), 109 activated by copper, and pyrophosphates, aluminosilicates, silicates, tripolyphosphates (tripolyphosphate) and the like are disclosed in the publication of Pennsylvania State University (Keith H. Butler, The Pennsylvania State University Press, 1980, S. 281). However, these phosphors are only available for short wavelength UV excitation. That is, these phosphors are not employed in fluorescent lamps because of their instability to chemical properties and temperature conditions.

On the other hand, rare earth ions, for example, Eu ^{2 +,} Ce ^{3 +,} and other in an oxygen-dominant active compounds by other components, yet for the effect provided by using the lead and / or copper as a host lattice Element There is no bar. When lead and / or copper are mixed into the host lattice element, not only can the luminescent intensity be improved, but also good luminescent properties such as change in the luminescent peak, color coordinate, and luminescence spectrum in a preferred direction, and stabilization of the lattice can be provided. The positive effect is expected.

Lead ions and / or copper ions included in the host lattice element provide the effect of improving the luminescence properties for longer wavelength excitation than 360 nm. In this wavelength region, due to the energy level of their electronic structure, both ions do not show their own changes in luminescence properties, and therefore, no deterioration in excitation luminescence properties is concerned.

Luminescent materials containing lead and copper are superior in luminescence intensity as compared to luminescent materials that do not contain these components in the host lattice. A more preferable effect of the light-emitting material containing lead and copper is to control the change in the emission wavelength high or low. These ions do not act as activators that adversely affect compounds containing lead or copper, but in some cases may cause unexpected splitting or covalency of the crystal structure.

Lead ions with an ion radius of 119 pm can easily replace alkaline earth ions, Ca with an ion radius of 100 pm, or Sr with 118 pm. Lead with an electronegativity of 1.55 is much greater than 1.04 of Ca and 0.99 of Sr. The proposal of materials containing lead is a very complex problem because the oxidation potential of these ions can adversely affect the environment. Therefore, compounds containing lead require special manufacturing processes.

In the crystal field, there is a general difference in the luminescence properties depending on which ions lead replaces. When lead replaces Sr or Ba of aluminate and / or silicate activated with Eu, the maximum light emission wavelength is transferred to the long wavelength side because the ion radius of Pb is smaller than the Ba and Sr ion radius. This represents a strong crystal field surrounding the activator ions.

Copper also shows the same effect by replacing alkaline earth ions. In this case copper provides further effects. Copper, which can be easily ionized in comparison with relatively large alkaline earth ions due to factors such as ionic charge and ion radius, has a stronger bonding force with neighboring oxygen ions than alkaline earth ions. Therefore, the shape of the light emission spectrum is further influenced to provide the effect of transforming the peak wavelength into a long wavelength and at the same time broadening the light emission spectrum curve in the light emission band. Additionally, by replacing with copper and / or lead ions, the luminescence intensity can be increased. The fact that light peaks can be shifted to long or short wavelengths will have a positive impact on the LED light emitting arts. This is because, in the optical device, specific fine adjustment is necessary to improve the brightness or to obtain a specific wavelength having a desired color coordinate. Such fine tuning may be achieved by the appropriate use of cations copper and lead.

On the other hand, it is well known that most luminescent materials and phosphors become unstable by water, moisture, water vapor, or polar solvents. For example, spinelle aluminates and orthorhombic or akermanite silicates are more sensitive to water, moisture, water vapor, or polar solvents because of their high basicity. Properties. However, since lead and / or copper have a high covalency and low basicity, when a cation having a high basicity is replaced, the lead and / or copper are mixed in a host lattice to exhibit properties of a luminescent material resistant to water, water vapor, and polar solvents.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light emitting material containing lead and / or copper having high efficiency that can replace alkaline earth ions capable of transferring light emission peaks into a long or short wavelength region in view of the above conventional problems. .

Another object of the present invention is to provide a light emitting material having a wide color temperature range and excellent color rendering property.

It is still another object of the present invention to provide a light emitting material containing copper and / or lead resistant to water, moisture, and polar solvents as well as improving light emission characteristics.

According to the present invention, the above object is achieved by a light emitting material characterized by using a compound containing a rare earth component and containing lead and / or copper in the light emitting material for ultraviolet light or visible light excitation.

Here, the compound is represented by the following formula (1), (Formula 2) or (Formula 3) Aluminate (Aluminate), (Silicate) represented by (Formula 4), (Anti-expression represented by Formula 5) One or a plurality of selected ones of an annatenate, germanate and / or germanate-silicate represented by (Formula 6), and phosphate represented by (Formula 7) It can be mixed.

(Formula 1)

a (M'O) · b (M '' 2 O) · c (M''X) · dAl 2 O 3 · e (M '''O) · f (M''''2 O 3) · g (M ''''' _o O _p ) · h (M'''''' _x O _y )

(Formula 2)

a (M'O) b (M '' ₂ O) c (M''X) 4-abc (M '''O) 7 (Al ₂ O ₃ ) d (B ₂ O ₃ ) E (Ga ₂ O ₃ ) f (SiO ₂ ) g (GeO ₂ ) h (M '''' _x O _y )

(Formula 3)

a (M'O) b (M''O) c (Al ₂ O ₃ ) d (M ''' ₂ O ₃ ) e (M''''O ₂ ) f (M''''' _x O _y )

(Formula 4)

a (M'O) b (M''O) c (M '''X) d (M''' ₂ O) e (M '''' ₂ O ₃ ) f (M ''''' _o O _P ) · g (SiO ₂ ) · h (M '''''' _x O _y )

(Formula 5)

a (M'O) b (M '' ₂ O) c (M''X) d (Sb ₂ O ₅ ) e (M '''O) f (M'''' _x O _y )

(Formula 6)

a (M'O) · b (M '' 2 O) · c (M''X) · dGeO 2 · e (M '''O) · f (M''''2 O 3) · g ( M ''''' _o O _p ) · h (M'''''' _x O _y )

(Formula 7)

a (M'O) · b (M '' 2 O) · c (M''X) · dP 2 O 5 · e (M '''O) · f (M''''2 O 3) · g (M '''''O ₂ ) · h (M'''''' _x O _y )

On the other hand, the compound is as follows when the formula (1) specifically expressed.

(Formula 1)

a (M'O) · b (M '' 2 O) · c (M''X) · dAl 2 O 3 · e (M '''O) · f (M''''2 O 3) · g (M ''''' _o O _p ) · h (M'''''' _x O _y )

Where M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), and M' 'is lithium (Li), sodium (Na), potassium (K), rubidium ( Rb), cesium (Cs), gold (Au), and silver (Ag) and one or more components selected from the group consisting of, M '' 'beryllium (Be), magnesium (Mg), calcium ( Consists of one or more components selected from the group consisting of Ca), strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn), where M '' '' is scandium (Sc), boron (B), gallium (Ga), and indium (In) is composed of one or more components selected from the group, M '' '' 'is silicon (Si), germanium (Ge) Or one selected from the group consisting of titanium (Ti), zirconium (Zr), manganese (Mn), vanadium (V), niobium (Nb), tantalum (Ta), tungsten (W), and molybdenum (Mo) Consists of the above components, M '' '' '' is bismuth (Bi), tin (Sn), anti Mon (Sb), Scandium (Sc), Yttrium (Y), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), One or more selected from the group consisting of gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu) And X consists of one or more components selected from the group comprising fluorine (F), chlorine (Cl), bromine (Br), and iodine (I), wherein a, b, c , d, e, f, g, h, o, p, x, y are 0 <a≤2, 0≤b≤2, 0≤c≤2, 0≤d≤8, 0 <e≤4, 0 ≦ f ≦ 3, 0 ≦ g ≦ 8, 0 <h ≦ 2, 1 ≦ o ≦ 2, 1 ≦ p ≦ 5, 1 ≦ x ≦ 2, and 1 ≦ y ≦ 5.

On the other hand, the compounds, the visible light spectrum having a color rendering index (CRI) of 90 or more initial ultraviolet light in the wavelength range of 380nm to 400nm and / or initial blue light in the wavelength range of 380nm to 500nm generated from one or more devices mounted in the light emitting device It is desirable to convert the wavelength into light of an area so that it can be applied to furniture, photography, microscopes, medical technology, or backlighting devices for general lighting in museums.

The light emitting material may also be applied to a phosphor for LEDs in a state in which a single compound and / or a plurality of single compounds are mixed to realize white light with improved color rendering property.

As described above, in accordance with the present invention, not only light emitting devices such as UV LEDs and blue LEDs, but also lead and / or copper, which are applicable as back lights or painting pigments, can be used. A light emitting material containing is provided. The present luminescent material converts excitation wavelengths from UV light and blue light into long wavelengths in the visible light region. In addition, it is possible to provide color temperatures and color coordinates over the entire range of white light embodied in mixed colors.

Hereinafter, preferred embodiments of the present invention will be described in detail.

First embodiment

The chemical formula of the aluminate containing lead and / or copper of the first embodiment is a (M'O) b (M '' ₂ O) c (M''X) 4-abc (M '''O) 7 (Al ₂ O ₃ ) d (B ₂ O ₃ ) e (Ga ₂ O ₃ ) f (SiO ₂ ) g (GeO ₂ ) h (M '''' _x O _y ).

Here, the metal M 'consists of one or more elements selected from the group comprising lead (Pb) and copper (Cu), and the metal M' 'is lithium (Li), sodium (Na), potassium ( K), rubidium (Rb), cesium (Cs), Au (gold), and Ag (silver) consists of one or more monovalent components selected from the group, the metal M '' 'is beryllium (Be) , One or more divalent components selected from the group comprising magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn) Metal M '' '' is bismuth (Bi), tin (Sn), antimony (Sb), scandium (Sc), yttrium (Y), lanthanum (La), indium (In), cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadolinium (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), One or more selected from the group consisting of thulium (Tm), ytterbium (Yb), and lutetium (Lu) Is composed of a minute, X is of a flow rise (F), chlorine (Cl), bromine (Br), and one or more components selected from the group consisting of iodine (I).

On the other hand, a, b, c, d, e, f, g, h, x, y are 0 <a≤4, 0≤b≤2, 0≤c≤2, 0≤d≤1, 0≤e respectively. ≤ 1, 0 ≤ f ≤ 1, 0 ≤ g ≤ 1, 0 <h ≤ 2, 1 ≤ x ≤ 2, and 1 ≤ y ≤ 5 are optional. At this time, it is preferable to select in the range of a + b + c <4.

The manufacture of luminescent materials containing copper and lead basically involves mixing in the solid state. At first, it is desirable to use pure starting materials that are completely free of impurities, i.e. iron. That is, it is preferable to use materials that can be transformed into oxides first through a heat treatment process. This is the basic principle for providing phosphor structures with superior oxygen.

Example of manufacture

In order to manufacture a light emitting material having the formula

_{.98 Cu 0 .02 Sr 3 Al 14} O 25: Eu

As the initial material, CuO, SrCO ₃ , Al (OH) ₃ , or Eu ₂ O ₃ may be used.

The initial materials in the form of oxides, hydroxides, and carbonates are mixed with a small amount of flux, for example H ₃ BO ₃ , in a stoichiometric ratio. The mixed material is heated in a one step process, i.e., an alumina crucible at 1200 ° C for 1 hour. The initially heated material is then heated for about 4 hours in a two-step process, with the air at 1450 ° C. lean. The materials that have undergone the one- and two-step processes are ground, washed, dried, and sieved. This process provides a light emitting material having a maximum emission wavelength of 494 nm.

The following Table 1 shows the 400nm where a comparison of the luminescence properties of the activated by Eu ^{2 +} containing copper at a wavelength of aluminate and, contained not activated by Eu ^{2 +} that the copper aluminate table, the light emission intensity and light emission Each wavelength is described.

Copper containing compound Copper free compound _{.98 Cu 0 .02 Sr 3 Al 14} O 25: Eu Sr ₄ Al ₁₄ O ₂₅ : Eu Luminous intensity (%) 103.1 100 Wavelength (nm) 494 493

On the other hand, in order to manufacture a light emitting material having the formula

_{.95 Pb 0 .05 Sr 3 Al 14} O 25: Eu

As the initial material, PbO, SrCO ₃ , Al ₂ O ₃ , Eu ₂ O ₃ may be used.

Oxides and carbonates, or other components, i.e., an initial material in the form of decomposition into oxides, are mixed in a stoichiometric proportion with a small amount of flux, for example H ₃ BO ₃ . The mixed material is heated in a one step process, i.e. with air supplied for 1 hour in an alumina crucible at 1200 ° C. The initially heated material is heated for about 2 hours in a two step process, 1450 ° C. with sufficient air, and then for about 2 hours with lean air. Subsequently, the materials that have undergone the one- and two-step processes are ground, washed, dried, and sieved. Then, a light emitting material having a maximum emission wavelength of 494.5 nm is provided.

The following Table 2 shows the 400nm excitation and activated by Eu ^{2 +} containing lead having a wavelength aluminate, a light emitting properties of the aluminate activated by Eu ^{2 +} did not contain lead, that is, light emission intensity and emission wavelength Are compared respectively.

Lead-containing compounds Lead free compound _{.95 Pb 0 .05 Sr 3 Al 14} O 25: Eu Sr ₄ Al ₁₄ O ₂₅ : Eu Luminous intensity (%) 101.4 100 Wavelength (nm) 494.5 493

Table 3 shows the optical emission characteristics obtained by applying the aluminate activated by the rare earth component containing copper and / or lead according to the first embodiment to UV and / or visible light.

Furtherance Excitation range (nm) Luminescence Intensity (%) of Copper / Lead-Containing Compounds with respect to Compounds without Copper / Lead at Excitation Wavelength 400nm Peak wavelength (nm) of compounds containing copper / lead Peak wavelength (nm) of compounds without copper / lead _{Cu 0 .5 Sr 3 .5 Al 14} O 25: Eu 360-430 101.2 495 493 _{.98 Cu 0 .02 Sr 3 Al 14} O 25: Eu 360-430 103.1 494 493 Pb _{0 .05} Sr _{3 .95} Al ₁₄ 360-430 101.4 494.5 493 Cu _0.01 Sr _{3 .99} Al _{13 .995} Si _0.005 O ₂₅ : Eu 360-430 103 494 492 _{Cu 0 .01 Sr 3 .395 Ba 0} .595 Al 14 O 25: Eu. Dy 360-430 100.8 494 493 _{Pb 0 .05 Sr 3 .95 Al 13} .95 Ga 0 .05 O 25: Eu 360-430 101.5 494 494

Example 2

The chemical formula of the aluminate containing lead and / or copper of the second embodiment is

a (M'O) b (M''O) c (Al ₂ O ₃ ) d (M ''' ₂ O ₃ ) e (M''''O ₂ ) f (M''''' _x O _y ).

Here, the metal M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), the metal M' 'is beryllium (Be), magnesium (Mg), calcium (Ca), Consists of one or more divalent components selected from the group comprising strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn), M '' 'is boron (B ), Gallium (Ga), and indium (In), consisting of one or more components selected from the group, M '' '' is silicon (Si), germanium (Ge), titanium (Ti), zirconium ( Zr), and one or more components selected from the group consisting of hafnium (Hf), M '' '' 'is bismuth (Bi), tin (Sn), antimony (Sb), scandium (Sc), Yttrium (Y), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadolinium (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytter (Yb), and is configured in the one or more components selected group comprising a lutetium (Lu).

On the other hand, a, b, c, d, e, f, x, y are each 0 <a≤1, 0≤b≤2, 0 <c≤8, 0≤d≤1, 0≤e≤1, 0 It is optional in the range of <f≤2, 1≤x≤2, and 1≤y≤5.

The light emission peaks and light emission intensities of Example 2 are described in Table 7 below.

Example of manufacture

In order to manufacture a light emitting material having the formula

Cu _0.05 Sr _0.95 Al _1.9997 Si _0.0003 O ₄ : Eu

As the initial material, CuO, SrCO ₃ , Al ₂ O ₃ , SiO ₂ , Eu ₂ O ₃ may be used.

Initial materials in the form of oxides and carbonates are mixed with small amounts of flux, eg AlF ₃ , in stoichiometric proportions. The mixed material is heated for 3 hours in an alumina crucible that is lean in air at 1250 ° C. The heated material is then sequentially subjected to grinding, washing, drying, and sieved processes. According to this, a light emitting material having a maximum emission wavelength of 521.5 nm is provided.

The following Table 4 is 400nm as a comparison of the luminescence properties of the aluminate activated by aluminates and, Eu ^{2 +} containing no copper activated by the excited Eu ^{2 +} containing copper at a wavelength, emission intensity and light emission of the Each wavelength is described.

Copper containing compound Copper free compound Cu _0.05 Sr _0.95 Al _1.9997 Si _0.0003 O ₄ : Eu SrAl ₂ O ₄ : Eu Luminous intensity (%) 106 100 Wavelength (nm) 521.5 519

On the other hand, in order to manufacture a light emitting material having the formula

_{Cu 0.12 BaMg 1 .88 Al 16 O} 27: Eu

CuO, MgO, BaCO ₃ , Al (OH) ₃ , Eu ₂ O ₃ may be used as the initial material.

Initial materials in the form of oxides, hydroxides, and carbonates are mixed with a small amount of flux AlF ₃ in a stoichiometric ratio. The mixed material is heated for 2 hours in an alumina crucible in an atmosphere of lean air at 1420 ° C. The heated material is then sequentially subjected to grinding, washing, drying, and sieved processes. According to this, a light emitting material having a maximum emission wavelength of 452 nm is provided.

The following Table 5 400nm as a comparison of the luminescence properties of the aluminate activated by the excited Eu ^{2 +} containing no and activated by Eu ^{2 +} containing copper having a wavelength aluminate, copper, light emitting intensity and of The light emission wavelength is described, respectively.

Copper containing compound Copper free compound _{Cu 0.12 BaMg 1 .88 Al 16 O} 27: Eu BaMg ₂ Al ₁₆ O ₂₇ : Eu Luminous intensity (%) 101 100 Wavelength (nm) 452 450

On the other hand, in order to manufacture a light emitting material having the formula

Pb _0.1 Sr _0.9 Al ₂ O ₄ : Eu

As the initial material, PbO, SrCO ₃ , Al (OH) ₃ , Eu ₂ O ₃ may be used.

Oxides and carbonates, or other components, i.e., an initial material in the form of decomposition into oxides, are mixed in a stoichiometric proportion with a small amount of flux such as H ₃ BO ₃ . The mixed material is heated in a one step process, i.e., air is supplied for 2 hours in an alumina crucible at 1000 ° C. The initially heated material is heated for about 1 hour in a two step process, 1420 ° C. with sufficient air, and then for about 2 hours with lean air. Subsequently, the materials that have undergone the one- and two-step processes are ground, washed, dried, and sieved. Then, a light emitting material having a maximum emission wavelength of 521 nm is provided.

The following table 6 is 400nm This compares with activated by Eu ^{2 +} containing lead having a wavelength aluminate, a light emitting properties of the aluminate activated by Eu ^{2 +} containing no lead table, the light emission intensity of and The light emission wavelength is described, respectively.

Lead-containing compounds Lead free compound Pb _0.1 Sr _0.9 Al ₂ O ₄ : Eu SrAl ₂ O ₄ : Eu Luminous intensity (%) 101 100 Wavelength (nm) 521 519

The optical emission characteristics of the aluminate activated by the rare earth component containing copper and / or lead according to the second embodiment are shown in Table 7.

Furtherance Excitation range (nm) Luminescence Intensity (%) of Copper / Lead-Containing Compounds for Copper / Lead-Free Compounds at Excitation Wavelength 400nm Peak wavelength (nm) of compound containing copper / lead Peak wavelength (nm) of compounds without copper / lead Cu _0.05 Sr _0.95 Al _1.9997 Si _0.0003 O ₄ : Eu 360-440 106 521.5 519 Cu _0.2 Mg _0.7995 Li _0.0005 Al _1.9 Ga _0.1 O ₄ : Eu, Dy 360-440 101.2 482 480 Pb _0.1 Sr _0.9 Al ₂ O ₄ : Eu 360-440 102 521 519 _{Cu 0 .05 BaMg 1.95 Al 16 O} 27: Eu, Mn 360-400 100.5 451,515 450,515 _{Cu 0.12 BaMg 1 .88 Al 16 O} 27: Eu 360-400 101 452 450 _{Cu 0 .01 BaMg 0 .99 Al 10} O 17: Eu 360-400 102.5 451 449 _{Pb 0 .1 BaMg 0 .9 Al 9} .5 Ga 0 .5 O 17: Eu, Dy 360-400 100.8 448 450 _{Pb 0 .08 Sr 0 .902 Al 2} O 4: Eu, Dy 360-440 102.4 521 519 _{Pb 0 .2 Sr 0 .8 Al 2} O 4 Mn 360-440 100.8 658 655 _{Cu 0 .06 Sr 0 .94 Al 2} O 4: Eu 360-440 102.3 521 519 _{Cu 0 .05 Ba 0 .94 Pb 0} .06 Mg 0 .95 Al 10 O 17 Eu 360-440 100.4 451 449 _{Pb 0 .3 Ba 0 .7 Cu 0} .1 Mg 1 .9 Al 16 O 27: Eu 360-400 100.8 452 450 _{Pb 0 .3 Ba 0 .7 Cu 0} .1 Mg 1 .9 Al 16 O 27: Eu; Mn 360-400 100.4 452,515 450,515

Example 3

The chemical formula of the silicate containing lead and / or copper of the third embodiment is

a (M'O) b (M''O) c (M '''X) d (M''' ₂ O) e (M '''' ₂ O ₃ ) f (M ''''' _o O _P ) · g (SiO ₂ ) · h (M '''''' _x O _y ).

Here, the metal M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), the metal M' 'is beryllium (Be), magnesium (Mg), calcium (Ca), Consists of one or more divalent components selected from the group consisting of strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn), where M '' 'is lithium (Li) ), One or more monovalent components selected from the group consisting of sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), Au (gold), and Ag (silver), M '' '' Consists of one or more components selected from the group consisting of aluminum (Al), gallium (Ga), and indium (In), M '' '' 'is germanium (Ge), vanadium (V ), Niobium (Nb), tantalum (Ta), tungsten (W), molybdenum (Mo), titanium (Ti), zirconium (Zr), and hafnium (Hf) M '' '' '' is bismuth (Bi), tin (Sn), Antimony (Sb), Scandium (Sc), Yttrium (Y), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), One or more selected from the group consisting of gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu) And X consists of one or more components selected from the group comprising fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

On the other hand, a, b, c, d, e, f, g, h, o, p, x, y are each 0 <a≤2, 0 <b≤8, 0≤c≤4, 0≤d≤2 0≤e≤2, 0≤f≤2, 0≤g≤10, 0 <h≤5, 1≤o≤2, 1≤p≤5, 1≤x≤2, and 1≤y≤5 Optional in the range.

The very good luminous intensity of this example 3 can be seen below.

Example of manufacture

In order to manufacture a light emitting material having the formula

_{Cu 0 .05 Sr 1 .7 Ca 0} .25 SiO 4: Eu

The initial material may be CuO, SrCO ₃ , CaCO ₃ , SiO ₂ , Eu ₂ O ₃ .

The initial materials in the form of very pure oxides and carbonates are mixed with small amounts of flux, for example NH ₄ Cl, in stoichiometric proportions. The mixed material is heated in a one step process in an alumina crucible at 1200 ° C. fed with an inert gas (N ₂ or non-corroded gas) for 2 hours. It is ground after one stage of heating. Then, in a two-stage process, the air is heated for about 2 hours in a 1200 ° C. alumina crucible in a somewhat sparse atmosphere. Thereafter, the grinding, washing, drying, and sieved processes are sequentially performed. Then, a light emitting material having a maximum light emission wavelength of 592 nm is provided.

The following Table 8 is 450nm as compared to the emission characteristics of the active silicate by the excited Eu ^{2 +} containing no silicate and copper activated by Eu ^{2 +} containing copper having a wavelength, light emission intensity and emission wavelength Each of these is described.

Copper containing compound Copper free compound _{Cu 0 .05 Sr 1 .7 Ca 0} .25 SiO 4: Eu Sr _{1 .7} Ca _{0 .3} SiO ₄ Eu Luminous intensity (%) 104 100 Wavelength (nm) 592 588

And, in order to manufacture a light emitting material having the formula

Cu _0.2 Ba ₂ Zn _0.2 Mg _0.6 Si ₂ O ₇ : Eu

CuO, BaCO ₃ , ZnO, MgO, SiO ₂ , Eu ₂ O ₃ may be used as the initial material.

Initial materials in the form of oxides and carbonates are mixed with small amounts of flux, for example NH ₄ Cl, in stoichiometric proportions. The mixed material is heated in a one step process in an alumina crucible at 1100 ° C. where the air is lean for 2 hours. It is ground after one stage of heating. Then, in a two-stage process, the air is heated for about 2 hours in a 1235 ° C. alumina crucible with somewhat sparse conditions. Thereafter, the grinding, washing, drying, and sieved processes are sequentially performed. Then, a light emitting material having a maximum light emission wavelength of 467 nm is provided.

The following Table 9 is 400nm as compared to the emission characteristics of the active silicate by the excited Eu ^{2 +} containing no silicate and copper activated by Eu ^{2 +} containing copper having a wavelength, light emission intensity and emission wavelength Each of these is described.

Copper containing compound Copper free compound Cu _0.2 Sr ₂ Zn _0.2 Mg _0.6 Si ₂ O ₇ : Eu _{Sr 2 Zn 2 Mg 0 .6 Si} 2 O 7: Eu Luminous intensity (%) 101.5 100 Wavelength (nm) 467 465

On the other hand, in order to manufacture a light emitting material having the formula

_{Pb 0.1 Ba 0.95 Sr 0 .95 Si} 0.998 Ge 0.002 O 4: Eu

As the initial material, PbO, SrCO ₃ , BaCO ₃ , SiO ₂ , GeO ₂ , Eu ₂ O ₃ may be used.

Initial materials in the form of oxides and carbonates are mixed with small amounts of flux, for example NH ₄ Cl, in stoichiometric proportions. The mixed material is heated in an alumina crucible at 1000 ° C. with sufficient air for two hours in a one step process. The material heated in the one-step process is heated in a two-step process in an alumina crucible at 1220 ° C., which is also full of air, for about four hours, followed by two additional hours of continuous lean air. Thereafter, the grinding, washing, drying, and sieved processes are sequentially performed. Then, a light emitting material having a maximum emission wavelength of 527 nm is provided.

The following table 10 is 450nm as compared to the emission characteristics of the active silicate by a silicate and, Eu ^{2 +} containing no lead activated by Eu ^{2 +} containing the lead has a excitation wavelength, emission intensity and emission wavelength Each of these is described.

Lead-containing compounds Lead free compound _{Pb 0.1 Ba 0.95 Sr 0 .95 Si} 0.998 Ge 0.002 O 4: Eu BaSrSiO ₄ : Eu Luminous intensity (%) 101.3 100 Wavelength (nm) 527 525

On the other hand, in order to manufacture a light emitting material having the formula

_{Pb 0 .25 Sr 3 .75 Si 3} O 8 Cl 4: Eu

As the initial material, PbO, SrCO ₃ , SrCl ₂ , SiO ₂ , GeO ₂ , Eu ₂ O ₃ may be used.

Initial materials in the form of oxides, chlorides, and carbonates are mixed with small amounts of flux, for example NH ₄ Cl, in stoichiometric proportions. The mixed material is heated for about 2 hours in a one step process, that is, in an alumina crucible with sufficient air at 1100 ° C. The primary heated material is heated for 4 hours at 1220 ° C., which is also air-rich, in a two-stage process and then further heated for an hour with lean air continuously. Thereafter, the grinding, washing, drying, and sieved processes are sequentially performed. According to this, a light emitting material having a maximum light emission wavelength of 492 nm is provided.

The following table 11 is 400nm as compared to the emission characteristics of the active-chloro-silicate by the excited Eu ^{2 +} that does not contain a chloro silicate and lead activated by Eu ^{2 +} containing lead having a wavelength, emission intensity and light emission of the Each wavelength is described.

Lead-containing compounds Lead free compound _{Pb 0 .25 Sr 3 .75 Si 3} O 8 Cl 4: Eu Sr ₄ Si ₃ O ₈ Cl ₄ : Eu Luminous intensity (%) 100.6 100 Wavelength (nm) 492 490

The optical emission characteristics of the silicates activated by the rare earth component containing copper and / or lead according to the third embodiment are shown in Table 12.

Furtherance Excitation range
(nm) Luminescence Intensity (%) of Copper / Lead-Containing Compounds for Copper / Lead-Free Compounds at Excitation Wavelength 400nm Peak Wavelength of Compounds Containing Copper / Lead
(nm) Peak wavelength of compounds without copper / lead (nm) _{Pb 0 .1 Ba 0 .95 Sr 0} .95 Si 0 .998 Ge 0 .002 O 4: Eu 360-470 101.3 527 525 _{Cu 0 .02 (Ba, Sr,} Ca, Zn) 1.98 SiO 4: Eu 360-500 108.2 565 560 _{Cu 0 .05 Sr 1 .7 Ca 0} .25 SiO 4: Eu 360-470 104 592 588 _{Cu 0 .05 Li 0.002 Sr 1.5 Ba} 0 .448 SiO 4: Gd, Eu 360-470 102.5 557 555 _{Cu 0 .2 Sr 2 Zn 0 .2} Mg 0 .6 Si 2 O 7: Eu 360-450 101.5 467 465 _{.8 Cu 0 .02 Ba 2 Sr 0} .2 Mg 0 .98 Si 2 O 8: Eu, Mn 360-420 100.8 440, 660 438, 660 Pb _{0 .25} Sr _{3 .75} Si ₃ O ₈ Cl ₄ Eu 360-470 100.6 492 490 _{Cu 0 .2 Ba 2 .2 Sr 0} .75 Pb 0 .05 Zn 0 .8 Si 2 O 8: Eu, 360-430 100.8 448 445 _{Cu 0 .2 Ba 3 Mg 0 .8} Si 1 .99 Ge 0 .01 O 8 : Eu, 360-430 101 444 440 _{Cu 0 .5 Zn 0 .5 Ba 2} Ge 0 .2 Si 1 .8 O 7: Eu 360-420 102.5 435 433 _{Cu 0 .8 Mg 0 .2 Ba 3} Si 2 O 8: Eu, Mn 360-430 103 438, 670 435, 670 _{0 .15} Ba _{.84 1 0} Zn Pb _.01 Zr Si _{0 .99 0 .01} O _4: Eu, 360-500 101 512 510 _{Cu 0 .2 Ba 5 Ca 2 .8} Si 4 O 16: Eu 360-470 101.8 495 491

Example 4

The chemical formula of the antimonate containing lead and / or copper of the fourth embodiment is

a (M'O) b (M '' ₂ O) c (M''X) d (Sb ₂ O ₅ ) e (M '''O) f (M'''' _x O _y )

Here, the metal M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), and the metal M' 'is lithium (Li), sodium (Na), potassium (K), One or more monovalent components selected from the group consisting of rubidium (Rb), cesium (Cs), Au (gold), and Ag (silver), and the metal M '' 'is beryllium (Be), magnesium ( One or more divalent components selected from the group consisting of Mg), calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn), Metal M '' '' is bismuth (Bi), tin (Sn), scandium (Sc), yttrium (Y), lanthanum (La), praseodymium (Pr), promerium (Pm), samarium (Sm), europium ( Consisting of one or more components selected from the group consisting of Eu), terbium (Tb), dysprosium (Dy), and gadolinium (Gd), where X is fluorine (F), chlorine (Cl), bromine (Br) One selected from the group containing iodine (I), and It is composed of more components.

On the other hand, a, b, c, d, e, f, x, y are each 0 <a≤2, 0≤b≤2, 0≤c≤4, 0 <d≤8, 0≤e≤8, 0 Optional in the ranges ≦ f ≦ 2, 1 ≦ x ≦ 2, and 1 ≦ y ≦ 5.

This fourth embodiment provides the luminescence intensity as seen in Table 15 in a 400 nm excited state.

Example of manufacture

In order to manufacture a light emitting material having the formula

_{Cu 0 .2 Mg 1 .7 Li 0} .2 Sb 2 O 7: Mn

As the initial material, CuO, MgO, Li ₂ O, Sb ₂ O ₅ , and MnCO ₃ may be used.

The initial materials in the form of oxides are mixed in small amounts of flux with stoichiometric ratios. The mixed material is heated for two hours in a one-step process, that is, in an alumina crucible with sufficient air at 985 ° C. The primary heated material is ground. The initial heated material is then heated for about 8 hours in a two step process, i.e., at 1200 ° C. with sufficient oxygen. Subsequently, the materials that have undergone the one- and two-step processes are ground, washed, dried, and sieved. This process provides a light emitting material having a maximum emission wavelength of 626 nm.

The following table 13 is 400nm here a cost and an aluminate activated by Eu ^{2 +} containing copper at a wavelength, containing no non-activated by Eu ^{2 +} copper anti comparing the light emission properties of the parent carbonate table, the light emission intensity and The light emission wavelength is described, respectively.

Copper containing compound Copper free compound _{Cu 0 .2 Mg 1 .7 Li 0} .2 Sb 2 O 7: Mn _{Mg 2 Li 0 .2 Sb 2 O} 7: Mn Luminous intensity (%) 101.8 100 Wavelength (nm) 652 650

On the other hand, in order to manufacture a light emitting material having the formula

_{Pb 0 .006 Ca 0 .6 Sr 0} .394 Sb 2 O 6

PbO, CaCO ₃ , SrCO ₃ , Sb ₂ O ₅ may be used as the initial material.

The initial materials in the form of oxides and carbonates are mixed with a small amount of flux in stoichiometric proportions. The mixed material is heated in a one step process, ie, in an alumina crucible with sufficient air at 975 ° C. for about 2 hours. The initial heated material is ground. Then, a two-step process, that is, heated for about 4 hours in an alumina crucible at 1175 ° C. with sufficient air, is further heated for 4 hours while continuously supplying oxygen. Subsequently, the materials that have undergone the one- and two-step processes are ground, washed, dried, and sieved. Then, a light emitting material having a maximum emission wavelength of 637 nm is provided.

The following Table 14 400nm excited light-emitting characteristics of the activated by Eu ^{2 +} containing lead at a wavelength antimonate the carbonate and activated by Eu ^{2 +} containing no napreul aluminate, that is, each of the light emission intensity and emission wavelength Compared.

 Lead-containing compounds  Lead free compound _{Pb 0 .006 Ca 0 .6 Sr 0} .394 Sb 2 O 6 _{Ca 0 .6 Sr 0 .4 Sb 2} O 6 Luminous intensity (%) 102 100 Wavelength (nm) 637 638

The luminescence properties of the antimonate activated by the rare earth component containing copper and / or lead according to the fourth embodiment are shown in Table 15.

Furtherance
Excitation range
(nm) Luminescence Intensity (%) of Copper / Lead-Containing Compounds for Copper / Lead-Free Compounds at Excitation Wavelength 400nm Peak Wavelength of Compounds Containing Copper / Lead
(nm) Peak wavelength of compounds without copper / lead (nm) _{Pb 0 .2 Mg 0 .002 Ca 1} .798 Sb 2 O 6 F 2: Mn 360-400 102 645 649 _{Cu 0 .15 Ca 1 .845 Sr 0} .005 Sb 1 .998 Si 0 .002 O 7: Mn 360-400 101.5 660 658 _{Cu 0 .2 Mg 1 .7 Li 0} .2 Sb 2 O 7: Mn 360-400 101.8 652 650 _{Cu 0 .2 Pb 0 .01 Ca 0} .79 Sb 1 .98 Nb 0 .02 O 6: Mn 360-400 98.5 658 658 _{Cu 0 .01 Ca 1 .99 Sb 1} .9995 V 0 .0005 O 7: Mn 360-400 100.5 660 657 _{Pb 0 .006 Ca 0 .6 Sr 0} .394 Sb 2 O 6 360-400 102 641 640 _{Cu 0 .02 Ca 0 .9 Sr 0} .5 Ba 0 .4 Mg 0 .18 Sb 2 O 7 360-400 102.5 649 645 _{Pb 0 .198 Mg 0 .004 Ca 1} .798 Sb 2 O 6 F 2 360-400 101.8 628 630

Fifth Embodiment

The chemical formula of germanates and / or germanat-silicates containing lead and / or copper of the fifth embodiment is

a (M'O) · b (M '' 2 O) · c (M''X) · dGeO 2 · e (M '''O) · f (M''''2 O 3) · g ( M ''''' _o O _p ) · h (M'''''' _x O _y ).

Here, the metal M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), and the metal M' 'is lithium (Li), sodium (Na), potassium (K), It is composed of one or more monovalent components selected from the group consisting of rubidium (Rb), cesium (Cs), gold (Au), and silver (Ag), and the metal M '' 'is beryllium (Be), magnesium ( Mg), consisting of one or more divalent components selected from the group comprising calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), and cadmium (Cd), and the metal M '' ' 'Is one or more trivalent components selected from the group consisting of scandium (Sc), yttrium (Y), boron (B), aluminum (Al), lanthanum (La), gallium (Ga), and indium (In) M '' '' 'is composed of silicon (Si), titanium (Ti), zirconium (Zr), manganese (Mn), vanadium (V), niobium (Nb), tantalum (Ta), tungsten (W) And one or more components selected from the group comprising molybdenum (Mo) M '' '' '' is a group comprising bismuth (Bi), tin (Sn), praseodymium (Pr), samarium (Sm), europium (Eu), gadolinium (Gd), and dysprosium (Dy) It consists of one or more components selected from and X consists of one or more components selected from the group comprising fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

On the other hand, a, b, c, d, e, f, g, h, o, p, x, y are each 0 <a≤2, 0≤b≤2, 0≤c≤10, 0 <d≤10 0≤e≤14, 0≤f≤14, 0≤g≤10, 0≤h≤2, 1≤o≤2, 1≤p≤5, 1≤x≤2, and 1≤y≤5 Optional in the range.

Referring to Table 18, it can be seen that this fifth embodiment provides excellent luminescence intensity compared to a compound containing no lead and / or copper.

Example of manufacture

In order to manufacture a light emitting material having the formula

_{0 .004 1 .99} Ca Zn Pb Ge _{0 .006 0 .8 .2 0} Si O ₄ Mn

As the initial material, PbO, CaCO ₃ , ZnO, GeO ₂ , SiO ₂ , and MnCO ₃ may be used.

Initial materials in the form of oxides and carbonates are mixed in a stoichiometric ratio with a small amount of flux, for example NH ₄ Cl. The mixed material is heated for two hours in a one-step process, that is, in an alumina crucible with sufficient oxygen at 1200 ° C. The primary heated material is ground. It is then heated further for about 2 hours in a two step process, i.e., at 1200 ° C. with sufficient oxygen. Subsequently, the material that has undergone the two step process is ground, washed, dried, and sieved. This process provides a light emitting material having a maximum emission wavelength of 655 nm.

Table 16 below compares the luminescence properties of the germanium activated by Mn containing lead and the germanium activated by Mn containing no lead at 400 nm excitation wavelength.

Lead-containing compounds Lead free compound _{0 .004 1 .99} Ca Zn Pb Ge _{0 .006 0 .8 .2 0} Si O ₄ Mn _{1 .99 0 .01} Ge ₀ Zn Ca _{.8 .2 0} Si O _4: Mn Luminous intensity /% 101.5 100 Wavelength / nm 655 657

On the other hand, in order to manufacture a light emitting material having the formula

_{Cu 0 .46 Sr 0 .54 Ge 0} .6 Si 0 .4 O 3: Mn

The initial material may be CuO, SrCO ₃ , GeO ₂ , SiO ₂ , and MnCO ₃ .

Initial materials in the form of oxides and carbonates are mixed in a stoichiometric proportion with a small amount of flux, for example NH ₄ Cl. The mixed material is heated for about 2 hours in a one step process, that is, in an alumina crucible with sufficient oxygen at 1100 ° C. The initial heated material is ground. The first heated material is then ground. Thereafter, a two-step process, that is, heated in an alumina crucible at 1180 ° C. with sufficient oxygen for about 4 hours. The material which has undergone the two step process is ground, washed, dried and sieved. Then, a light emitting material having a maximum emission wavelength of 658 nm is provided.

Table 17 below compares the luminescence properties of the germanate-silicate activated by Mn containing copper and the germanate-silicate activated by Mn containing no copper at 400 nm excitation wavelength.

Copper containing compound Copper free compound _{Cu 0 .46 Sr 0 .54 Ge 0} .6 Si 0 .4 O 3: Mn _{SrGe 0 .6 Si 0 .4 O 3} : Mn Luminous intensity (%) 103 100 Wavelength (nm0 658 655

The results obtained with respect to the germanate or germanate-silicate containing copper and / or lead according to the fifth embodiment are shown in Table 18.

Furtherance Excitation range
(nm) Luminescence Intensity (%) of Copper / Lead-Containing Compounds for Copper / Lead-Free Compounds at Excitation Wavelength 400nm Peak Wavelength of Compounds Containing Copper / Lead
(nm) Peak wavelength of compounds without copper / lead (nm) _{0 .004 1 .99} Ca ₀ Zn Pb Ge _{.006 0 .8 .2 0} Si O _4: Mn 360-400 101.5 655 657 _{Pb 0 .002 Sr 0 .954 Ca 1} .044 Ge 0 .93 Si 0 .07 O 4: Mn 360-400 101.5 660 661 _{Cu 0 .46 Sr 0 .54 Ge 0} .6 Si 0 .4 O 3: Mn 360-400 103 658 655 _{Cu 0 .002 Sr 0 .998 Ba 0} .99 Ca 0 .01 Si 0 .98 Ge 0 .02 O 4: Eu 360-470 102 538 533 _{.55 Ge 9 Cu 1 .45 Mg 26} .4 Si 0 .6 O 48: Mn 360-400 102 660 657 _{Cu 1 .2 Mg 26 .8 Ge 8} .9 Si 1 .1 O 48: Mn 360-400 103.8 670 656 _{Cu 4 Mg 20 Zn 4 Ge 5} Si 2 .5 O 38 F 10: Mn 360-400 101.5 658 655 _{Pb 0 .001 Ba 0 .849 Zn 0} .05 Sr 1 .1 Ge 0 .04 Si 0 .96 O 4: Eu 360-470 101.8 550 545 _{Cu 0 .05 Mg 4 .95 GeO 6} F 2: Mn 360-400 100.5 655 653 _{Cu 0 .05 Mg 3 .95 GeO 5} .5 F: Mn 360-400 100.8 657 653

Example 6

The chemical formula of phosphates containing lead and / or copper of the sixth embodiment is

a (M'O) · b (M '' 2 O) · c (M''X) · dP 2 O 5 · e (M '''O) · f (M''''2 O 3) · g (M '''''O ₂ ) · h (M'''''' _x O _y ).

Here, the metal M 'is composed of one or more components selected from the group consisting of lead (Pb) and copper (Cu), and the metal M' 'is lithium (Li), sodium (Na), potassium (K), It is composed of one or more monovalent components selected from the group consisting of rubidium (Rb), cesium (Cs), gold (Au), and silver (Ag), and the metal M '' 'is beryllium (Be), magnesium ( Consists of one or more divalent components selected from the group consisting of Mg), calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), manganese (Mn) and cadmium (Cd) M '' '' is one or more selected from the group consisting of scandium (Sc), yttrium (Y), boron (B), aluminum (Al), gallium (Ga), indium (In) and lanthanum (La) Trivalent component, M '' '' 'is silicon (Si), germanium (Ge), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), One selected from the group consisting of tantalum (Ta), tungsten (W), and molybdenum (Mo) or M '' '' '' is bismuth (Bi), tin (Sn), praseodymium (Pr), samarium (Sm), europium (Eu), gadolinium (Gd), dysprosium (Dy), Consisting of one or more components selected from the group comprising cerium (Ce), and terbium (Tb), where X comprises fluorine (F), chlorine (Cl), bromine (Br), and iodine (I) It consists of one or more components selected from the group.

On the other hand, a, b, c, d, e, f, g, h, x, y are 0 <a≤2, 0≤b≤12, 0≤c≤16, 0 <d≤3, 0≤e, respectively. 5, 0 ≦ f ≦ 3, 0 ≦ g ≦ 2, 1 ≦ x ≦ 2, 0 <h ≦ 2, and 1 ≦ y ≦ 5.

The sixth embodiment can be used as a compound for UV in a light emitting device.

Example of manufacture

In order to manufacture a light emitting material having the formula

_{Cu 0 .02 Ca 4 .98 (PO} 4) 3 Cl: Eu

The initial material may be CuO, CaCO ₃ , Ca ₃ (PO ₄ ) ₂ , CaCl ₂ , or Eu ₂ O ₃ .

Oxides, phosphates and sulfates, as well as carbonates and chlorides, are mixed in small amounts with flux and stoichiometric ratios. The mixed material is heated for about 2 hours in an alumina crucible in a lean state of air at 1240 ° C. The heated material is ground, washed, dried, and sieved. This process provides a light emitting material having a maximum emission wavelength of 450 nm.

This table 19 has been compared to the 400nm light emitting properties of the phosphate-chloro (chlorophosphate) and a-chloro-phosphate activated by Eu ^{2 +} containing no copper activated by the excited Eu ^{2 +} containing copper at a wavelength.

Copper-containing compounds Copper free compound _{Cu 0 .02 Ca 4 .98 (PO} 4) 3 Cl: Eu Ca ₅ (PO ₄ ) ₃ Cl: Eu Luminous intensity /% 101.5 100 Wavelength / nm 450 447

On the other hand, the characteristic results of the light emitting material activated by the rare earth component containing copper and / or lead according to the sixth embodiment can be seen in Table 20.

Furtherance Excitation range
(nm)
Luminescence Intensity (%) of Copper / Lead-Containing Compounds for Copper / Lead-Free Compounds at Excitation Wavelength 400nm Peak wavelength of compound containing copper / lead (nm) Peak Wavelength of Compounds Containing No Copper / Lead
(nm) _{Cu 0 .02 Sr 4 .98 (PO} 4) 3 Cl: Eu 360-410 101.5 450 447 _{Cu 0 .2 Mg 0 .8 BaP 2} O 7: Eu, Mn 360-400 102 638 635 _{Pb 0 .5 Sr 1 .5 P 1} .84 B 0.16 O 6 .84: Eu 360-400 102 425 420 _{Cu 0 .5 Mg 0 .5 Ba 2} (P, Si) 2 O 8: Eu 360-400 101 573 570 _{Cu 0 .5 Sr 9 .5 (P} , B) 6 O 24 Cl 2: Eu 360-410 102 460 456 _{Cu 0 .5 Ba 3 Sr 6 .5} P 6 O 24 (F, Cl) 2: Eu 360-410 102 443 442 _{Cu 0 .05 (Ca, Sr,} Ba) 4.95 P 3 O 12 Cl: Eu, Mn 360-410 101.5 438, 641 435, 640 _{Pb 0 .1 Ba 2 .9 P 2} O 8: Eu 360-400 103 421 419

Claims (4)

In the ultraviolet or visible light excitation light emitting material,
A compound comprising europium (Eu) as an activator and containing copper as a divalent ion as a host lattice element,
The compound is a light emitting material, characterized in that the phosphate-based compound. The method according to claim 1,
The compound is a light emitting material, characterized in that it comprises a phosphate (Phosphate) represented by the following formula (7).
(Formula 7)
a (M'O) · b (M '' 2 O) · c (M''X) · dP 2 O 5 · e (M '''O) · f (M''''2 O 3) · g (M '''''O ₂ ) · h (M'''''' _x O _y )
Wherein M 'consists of one or more components selected from the group consisting of lead (Pb) and copper (Cu);
M '' is one or more components selected from the group consisting of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), gold (Au), and silver (Ag) Consisting of;
M '''is in the group containing beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), cadmium (Cd), and manganese (Mn) One or more components selected;
M '''' is one selected from the group consisting of scandium (Sc), yttrium (Y), boron (B), aluminum (Al), lanthanum (La), gallium (Ga), and indium (In) It consists of the above components;
M '''''is silicon (Si), germanium (Ge), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), neodymium (Nd), tantalum (Ta), tungsten (W ) And one or more components selected from the group comprising molybdenum (Mo);
M '''''' is bismuth (Bi), tin (Sn), praseodymium (Pr), samarium (Sm), europium (Eu), gadolinium (Gd), dysprosium (Dy), cerium (Ce), and terbium ( One or more components selected from the group comprising Tb);
X consists of one or more components selected from the group comprising fluorine (F), chlorine (Cl), bromine (Br), and iodine (I);
0 <a≤2, 0≤b≤12, 0≤c≤16, 0 <d≤3, 0≤e≤5, 0≤f≤3, 0≤g≤2, 0 <h≤2, 1≤ x≤2, and 1≤y≤5. The method according to claim 1 or 2, wherein the compound,
Converting the initial ultraviolet light in the 300 nm to 400 nm wavelength region or the initial blue light in the 380 nm to 500 nm wavelength region from one or more devices mounted in the light emitting device to the light in the visible spectral region having a color rendering property (CRI) of 90 or more; Light emitting material characterized in that. The method according to claim 1 or 2,
The light emitting material is a light emitting material, characterized in that applied to the LED in a state in which a single compound or a plurality of single compounds are mixed to achieve a white light with improved color rendering.