White-light fluorescent powder and preparation method thereof and white light-emitting device
A technology of light-emitting devices and phosphors, applied in the direction of light-emitting materials, semiconductor devices, chemical instruments and methods, etc., can solve the problems of low production costs, and achieve the effects of low production costs, high purity, and good chemical stability
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Embodiment 1
[0058] A white phosphor LiY 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 The preparation method comprises the following steps:
[0059] (1) According to the chemical formula LiY of the target product 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 , take the raw materials by the mol ratio of Li:Y:Dy:Eu:Mo:W=1:0.933:0.06:0.007:1.2:0.8, take by weighing 0.0224g of dysprosium oxide with an electronic balance, add 20ml of deionized water and stir, And add 20ml of nitric acid with a concentration of 0.1mol / L to dissolve, and remove the excess nitric acid by heating to obtain a dysprosium nitrate solution, then add 0.1379g of lithium nitrate, 0.0063g of europium nitrate and 0.7146g of yttrium nitrate to the dysprosium nitrate solution , and add 20ml of deionized water and stir to prepare a metal nitrate mixed solution;
[0060] Then take by weighing 0.4237g ammonium molybdate tetrahydrate and 0.4056g ammonium tungstate (molecular weight is 3042.58), add 50ml deionized wat...
Embodiment 2
[0077] A white phosphor LiY 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 The preparation method comprises the following steps:
[0078] (1) According to the chemical formula LiY of the target product 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 , take the raw materials by the mol ratio of Li:Y:Dy:Eu:Mo:W=1:0.933:0.06:0.007:1.2:0.8, take by weighing 0.0224g of dysprosium oxide with an electronic balance, add 20ml of deionized water and stir, And add 20ml of nitric acid with a concentration of 0.1mol / L to dissolve, and remove the excess nitric acid by heating to obtain a dysprosium nitrate solution, then add 0.1379g of lithium nitrate, 0.0063g of europium nitrate and 0.7146g of yttrium nitrate to the dysprosium nitrate solution , and add 20ml of deionized water and stir to prepare a metal nitrate mixed solution;
[0079] Then weigh 0.4237g of ammonium molybdate tetrahydrate and 0.4056g of ammonium tungstate, add 50ml of deionized water, and add 7.35g of citric acid...
Embodiment 3
[0084] A white phosphor LiY 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 The preparation method comprises the following steps:
[0085] (1) According to the chemical formula LiY of the target product 0.933 Dy 0.06 Eu 0.007 (Mo 0.6 W 0.4 o 4 ) 2 , take the raw materials by the mol ratio of Li:Y:Dy:Eu:Mo:W=1:0.933:0.06:0.007:1.2:0.8, take by weighing 0.0224g of dysprosium oxide with an electronic balance, add 20ml of deionized water and stir, And add 20ml of nitric acid with a concentration of 0.1mol / L to dissolve, and remove the excess nitric acid by heating to obtain a dysprosium nitrate solution, then add 0.1379g of lithium nitrate, 0.0063g of europium nitrate and 0.7146g of yttrium nitrate to the dysprosium nitrate solution , and add 20ml of deionized water and stir to prepare a metal nitrate mixed solution;
[0086] Then weigh 0.4237g of ammonium molybdate tetrahydrate and 0.4056g of ammonium tungstate, add 50ml of deionized water, and add 4.15g of citric acid...
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