Kind of fluorine nitride fluorescent powder and the light emitting device containing the fluorescent powder

Abstract

This invention involves a kind of fluorine nitride fluorescent powder and the light emitting device containing the fluorescent powder. The chemical formula of fluorescent powder is R.sub.x(M.sub.y,Eu.sub.z)Al.sub.a(Si.sub.b,Ge.sub.c,Mn.sub.f)N.sub.dF.sub.e. In the formula, R is selected from Li, Na and K (at least one element); M is selected from Ca, Sr, Mg and Ba (at least one element); x, y, z, a, b, c and d are the amount of substance of each component, where 0<x0.2, 0.9y1.0, 0.001z0.1, 0.9a0.99, 0.8b1.0, 0c0.1, 2.5d3.0, 0.01e1.2, 0.01f0.1. In this invention, alkali metal, fluorine element and manganese element are introduced in the fluorescent powder at the same time. The luminous efficiency is high, and the synthetic process is simple. Its structure is same with CaAlSiN.sub.3. The fluorescent powder may be used independently or combined with other fluorescent powder to prepare the light emitting device with high performance.

Claims

1. A kind of fluorine nitride fluorescent powder, characterized by that its chemical formula is:
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.1.0Ge.sub.0.05Mn.sub.0.01N.sub.2.7F.sub.0.3 or K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.96Ge.sub.0.08Mn.sub.0.01N.sub.2.7F.sub.0.3
or K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.1.08Ge.sub.0.06Mn.sub.0.01N.sub.2.7F.sub.0.3 or
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 or
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.945Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 or
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.98Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 or
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.03N.sub.2.94F.sub.0.3 or
K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.05N.sub.2.94F.sub.0.3.

2. A light emitting device, comprising an excitation light source and an illuminant, wherein said illuminant includes the fluorescent powder of claim 1.

3. The light emitting device of claim 2, wherein said excitation light source is ultraviolet or blue light emission source.

Description

DESCRIPTIONS OF ATTACHED FIGURES

[0021] Attached figures are used to further explain this invention, but the implementation examples in the attached figures do not form any restriction of this invention. For common technical personnel in this field, other attached figures may be gained according to the following attached figures under the precondition of no any creative labor.

[0022] FIG. 1 shows the excitation light and emission spectrum in Implementation Example 1;

[0023] FIG. 2 shows XRD spectrum in Implementation Example 1.

DETAILED IMPLEMENTATION WAY

[0024] Next, the implementation examples are further enumerated to describe this invention in detail. Similarly, we should understand the following implementation examples are only used to further explain the invention, and cannot be understood as the restriction of protection scope of this invention. Some non-essential improvements and adjustments made by technical personnel in this field according to the above content of his invention belong to the protection scope of this invention. The specific technological parameters in the following examples are only suitable for one example in the scope. In other words, the technical personnel in this field may make a choice in the appropriate scope based on the description here, and may not be limited to the specific values in the following examples.

Implementation Example 1

[0025] Implementation example 1 In the chemical formula K.sub.0.1Ca.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3, weigh compound of calcium metal, nitride of aluminium metal, nitride of silicon metal and compound of europium metal according to the stoichiometric ratio; after mixing them evenly, sinter for 8 h under 1600 C. to gain the midbody; crush and post-process the midbody as the precursor of hydrothermal method; add fluoride of potassium metal, compound of silicon metal and compound of manganese metal, and conduct hydrothermal mixing for 4 h; after drying under 90 C., dry the surface to gain the product. Fluorescence luminescence characteristics of the product are shown in Tab.1. The emission spectrum is shown in FIG. 1.

Implementation Examples 215

[0026] In the chemical formula R.sub.x(M.sub.y,Eu.sub.z)Al.sub.a(Si.sub.b,Ge.sub.c,Mn.sub.f)N.sub.dF.sub.e, R is selected from Li, Na and K (at least one element); M is selected from Ca, Sr, Mg and Ba (at least one element); x, y, z, a, b, c, d, e and f are the amount of each component. The compounds of corresponding elements are weighed according to the different chemical components. The preparation process is same with Implementation example 1. Fluorescence luminescence characteristics of the product are shown in Tab.1.

TABLE-US-00001 TABLE 1 Luminescence characteristics of fluorescent powder Rela- Implemen- tive tation inten- example Chemical formula sity 1 K.sub.0.1Ca.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 100 2 K.sub.0.1Sr.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 83 3 K.sub.0.1Ba.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 73 4 K.sub.0.1Mg.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 80 5 Li.sub.0.1Ca.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 98 6 Na.sub.0.1Ca.sub.0.886Eu.sub.0.004Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 91 7 K.sub.0.1Ca.sub.0.1Sr.sub.0.85Eu.sub.0.001Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 125 8 K.sub.0.1Ca.sub.0.1Sr.sub.0.85Eu.sub.0.003Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 131 9 K.sub.0.1Ca.sub.0.1Sr.sub.0.85Eu.sub.0.01Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 135 10 K.sub.0.1Ca.sub.0.1Sr.sub.0.85Eu.sub.0.05Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 140 11 K.sub.0.1Ca.sub.0.1Sr.sub.0.85Eu.sub.0.1Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.7F.sub.0.3 122 12 K.sub.0.2Ca.sub.0.1Sr.sub.0.8Eu.sub.0.04Al.sub.0.9Si.sub.0.95Mn.sub.0.01N.sub.2.52F.sub.0.6 132 13 K.sub.0.05Ca.sub.0.1Sr.sub.0.8Eu.sub.0.04Al.sub.0.9Si.sub.1.0Mn.sub.0.01N.sub.3F.sub.0.15 125 14 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.1.05Ge.sub.0.1Mn.sub.0.01N.sub.2.7F.sub.0.3 139 15 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.1.0Ge.sub.0.05Mn.sub.0.01N.sub.2.7F.sub.0.3 142 16 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.96Ge.sub.0.08Mn.sub.0.01N.sub.2.7F.sub.0.3 144 17 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.1.08Ge.sub.0.06Mn.sub.0.01N.sub.2.7F.sub.0.3 143 18 K.sub.0.08Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.98Si.sub.1.0Ge.sub.0.05Mn.sub.0.01N.sub.2.7F.sub.0.24 138 19 K.sub.0.2Ca.sub.0.1Sr.sub.0.8Eu.sub.0.04Al.sub.0.94Si.sub.1.1Mn.sub.0.01N.sub.2.5F.sub.1.2 135 20 K.sub.0.033Ca.sub.0.1Sr.sub.0.83Eu.sub.0.04Al.sub.0.93Si.sub.1.1Mn.sub.0.01N.sub.2.5F.sub.0.01 123 21 K.sub.0.1Ca.sub.0.1Sr.sub.0.84Eu.sub.0.05Al.sub.0.99Si.sub.1.08Ge.sub.0.06Mn.sub.0.01N.sub.2.7F.sub.0.3 145 22 K.sub.0.04Ca.sub.0.1Sr.sub.0.8Eu.sub.0.05Al.sub.0.9Si.sub.0.8Ge.sub.0.06Mn.sub.0.06N.sub.2.7F.sub.0.12 127 23 K.sub.0.04Ca.sub.0.1Sr.sub.0.9Eu.sub.0.05Al.sub.0.9Si.sub.1.08Ge.sub.0.06Mn.sub.0.01N.sub.2.7F.sub.0.12 134 24 K.sub.0.05Ca.sub.0.1Sr.sub.0.9Eu.sub.0.04Al.sub.0.9Si.sub.1.0Mn.sub.0.01N.sub.3F.sub.0.15 139 25 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 146 26 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.945Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 143 27 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.98Ge.sub.0.06Mn.sub.0.01N.sub.2.94F.sub.0.3 145 28 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.03N.sub.2.94F.sub.0.3 149 29 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.05N.sub.2.94F.sub.0.3 146 30 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.08N.sub.2.94F.sub.0.3 135 31 K.sub.0.1Ca.sub.0.1Sr.sub.0.83Eu.sub.0.05Al.sub.0.9Si.sub.0.99Ge.sub.0.06Mn.sub.0.1N.sub.2.94F.sub.0.3 130

[0027] What are described above are just the good implementation examples of this invention. They are not used to restrict this invention. Any modification, equivalent replacement and improvement under the spirit and principle of this invention should be included in the protection range of this invention.