Red light phosphor and multilayer photo-transforming film
First Claim
1. A red light phosphor, comprising sulfide and activating agent wherein:
- the sulfide is a fluorine-sulfur oxide containing lanthanum-yttrium-zirconium and/or hafnium with overall stoichiometric formula as (La1-x-y-zYxAyMez+4O)2S1(F−
1)2z, wherein x=0.001-0.2, y=0.01-0.2, z=0.001-0.005, and Me+4 is selected from the group consisting of Zr+4, Hf+4, and combinations thereof; and
the activating agent, A, comprises TR+3 and TR+4, wherein TR+3 is selected from the group consisting of Eu, Sm, Gd, Tb, and combinations thereof, and TR+4 is Pr+4.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a red light phosphor, which is based on sulfide and activating agent containing rare earth strontium or hafnium. It is characterized by that the aforementioned materials are a fluorine-sulfur oxide containing lanthanum-yttrium-zirconium and/or hafnium with its stoichiometric formula as (La1-x-y-zYxAyMez+4O)2S1(F−1)2z, and activating agent based on A=(TR+3=Σ Eu, Sm, Gd, Tb)+(TR+4═Pr+4), in which Me+4=Zr+4 and/or Hf+4. Compared with standard materials, the luminous intensity of the phosphor according to the present invention is increased to 1.6-2.4 times. Further, the red light phosphor according to the present invention has a mean diameter of d50≈0.6 μm. The present invention also discloses a multilayer photo-transforming film, in which the three-layer agro-film is filled with phosphor. The agro-film is based on polythene and its derivatives and added with photostabilizer.
3 Citations
4 Claims
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1. A red light phosphor, comprising sulfide and activating agent wherein:
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the sulfide is a fluorine-sulfur oxide containing lanthanum-yttrium-zirconium and/or hafnium with overall stoichiometric formula as (La1-x-y-zYxAyMez+4O)2S1(F−
1)2z, wherein x=0.001-0.2, y=0.01-0.2, z=0.001-0.005, and Me+4 is selected from the group consisting of Zr+4, Hf+4, and combinations thereof; andthe activating agent, A, comprises TR+3 and TR+4, wherein TR+3 is selected from the group consisting of Eu, Sm, Gd, Tb, and combinations thereof, and TR+4 is Pr+4. - View Dependent Claims (2, 3, 4)
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Specification
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- Resources
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Current AssigneeWei-Hung Lo
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Original AssigneeWei-Hung Lo
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InventorsTsai, Chi-Ruei, Naum, Soshchin, Lo, Wei-Hung
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Primary Examiner(s)Lorengo; Jerry
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Assistant Examiner(s)EDMONDSON, LYNNE RENEE
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Application NumberUS12/123,190Publication NumberTime in Patent Office1,198 DaysField of Search252/301.4 S, 252/301.4 R, 252/301.4 F, 252/301.4 H, 252/301.6 F, 252/301.6 S, 423/48, 423/466.2US Class Current252/301.40SCPC Class CodesC09K 11/779 Halogenides C09K11/7784 tak...
