Orange red fluorescent powder for LED (Light Emitting Diode) and preparation method thereof
A fluorescent powder and orange-red technology, applied in the field of rare earth luminescent materials, can solve the problems of poor color rendering, low efficiency, and unstable performance, and achieve stable physical and chemical properties, high energy conversion efficiency, and simple synthesis methods Effect
Active Publication Date: 2012-09-26
CHINA JILIANG UNIV
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Abstract
The invention discloses orange red fluorescent powder for an LED (Light Emitting Diode), which is tervalent samarium activated tellurate fluorescent powder and has a chemical formula of (Ma-2xSmxAx)TebOc, wherein M is at least one of Ca, Sr and Ba; A is at least one of Li, Na and K; a is more than or equal to 1 but less than or equal to 3; b is more than or equal to 1 but less than or equal to 4; c is more than or equal to 3 but less than or equal to 11; and x is more than 0 but less than 0.1. The invention also discloses a preparation method for the compound, which comprises the following steps of: uniformly milling and mixing monomers, compounds or corresponding salts of M, Te and Sm and the compounds or corresponding salts of A; roasting at high temperature; and smashing, cleaning, removing impurities, and drying, and then processing, thereby obtaining the orange red fluorescent powder for the LED. The orange red fluorescent powder has the characteristics of wide excitation wavelength range, high efficiency, stability, and the like; the preparation method is simple; no pollution is caused; the cost is low; and the orange red fluorescent powder can be used for manufacturing a white light LED by using a purple light or ultraviolet light LED chip.
Application Domain
Gas discharge lamp usageLuminescent compositions +1
Technology Topic
Excitation wavelengthWhite light +8
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