Red double-perovskite fluorescent powder for white-light LEDs and preparation method of red double-perovskite fluorescent powder
A technology of red phosphor and double perovskite, which is applied in chemical instruments and methods, luminescent materials, gas discharge lamps, etc., can solve the problem of insufficient intensity of the red light emission area, and achieve good color purity and color rendering , good color rendering and high emission intensity
Active Publication Date: 2012-08-15
武汉视美乐激光显示发展有限公司
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Abstract
The invention relates to a red double-perovskite fluorescent powder for white-light LEDs and a preparation method of the red double-perovskite fluorescent powder. The red double-perovskite fluorescent powder is characterized by comprising double-perovskite components shown in the following formula: (AA'1-xMex)MgMO<6>, wherein the A is one of Na or K, the A' is one of La or Gd or composition of the La and the Gd, the M is one of W or Mo or composition of the W and the Mo, the Me is one of rare-earth element Eu or Pr, and the x is larger than or equal to 0.005 and is smaller than or equal to 0.5. The fluorescent powder is prepared by means of sol-gel, single-phase double-perovskite oxide powder can be obtained at the lower temperature and in shorter time, mixing of ions or atoms can be realized by active ions of rare earth, test period is short and stability is fine.
Application Domain
Gas discharge lamp usageLuminescent compositions
Technology Topic
Rare-earth elementIon +7
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