Near-infrared fluorescent powder and optical device comprising same
A fluorescent powder and near-infrared technology, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of low luminous efficiency, single spectral coverage, and lack of types of near-infrared phosphor materials, and achieve high luminous efficiency , the effect of broadening the application field
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[0043] The phosphor powder mentioned above in this application can preferably adopt the following preparation method provided by this application. Compounds, oxides or their alloys are used as raw materials, and the raw materials are mixed to obtain a mixture; step 2), the mixture obtained in step 1) is put into a container and roasted under nitrogen or other non-oxidizing atmosphere to obtain a roasted product, wherein, The highest sintering temperature is 900-1200° C., and the holding time is 2-6 hours; step 3), the roasted product in step 2 is sequentially crushed, washed, sieved and dried to obtain fluorescent powder.
[0044] The phosphor powder absorption spectrum peak wavelength of the inorganic compound with the above composition is located in the 400-460nm, 600-660nm and 700-800nm near-infrared bands, and the emission peak wavelength covers the interval of 1270-1330nm.
[0045] In another typical embodiment of the present application, a light-emitting device is prov...
Embodiment 1
[0051] The near-infrared fluorescent powder provided by this embodiment contains a compound whose composition formula is Ca 1.79 Sr 0.2 Lu 0.01 Ge 0.94 o 4.005 :0.06Cr. According to the stoichiometric ratio of the chemical formula, the oxide raw materials taken symmetrically were ground and mixed to obtain a mixture; the mixture was ground and mixed and then calcined at 1250°C for 5 hours, and the roasted product was obtained after cooling down; the obtained roasted product was After crushing, grinding, grading, sieving and washing, etc., the near-infrared phosphor intermediate can be obtained.
[0052] Utilize fluorescence spectrometer to carry out absorption, emission spectrum test to gained near-infrared sample, by the absorption of the near-infrared fluorescent powder sample prepared in this embodiment 1, emission spectrum figure is as follows Figure 1-2 shown. From Figure 1-2 It can be seen that the obtained near-infrared phosphor samples have effective absorptio...
Embodiment 57
[0070] The light-emitting device described in this embodiment uses a semiconductor chip with a wavelength of 460nm as a light source, and the light-emitting material is a near-infrared phosphor, and the chemical formula of the near-infrared phosphor is Ca 1.84 Sr 0.08 Lu 0.04 Ge 0.817 f 0.043 Bi 0.08 o 3.98 :0.06Cr,0.04Na + According to the stoichiometric ratio, the raw materials were accurately weighed, and the raw materials were ground and mixed to obtain a mixture; the mixture was calcined at 1200°C for 5 hours, and the roasted product was obtained after cooling; the obtained roasted product was crushed, ground, After grading, sieving and washing, the near-infrared fluorescent powder is obtained. In addition, in this embodiment, the La with emission wavelength range of 500-780nm 2.85 Si 6 N 11 :0.15Ce 3+ , (Ca 0.2 Sr 0.8 ) 0.95 AlSiN 3 :0.05Eu 2+ And near-infrared phosphors (La, Y, Gd, Lu) with emission wavelengths in the range of 780-1550nm 3 (Al,Ga) 5 (Ge...
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Abstract
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