Cr < 3 + >/Ni < 2 + > co-doped broadband near-infrared fluorescent powder, preparation method thereof and conversion type LED light-emitting device
A light-emitting device, near-infrared technology, applied in the direction of light-emitting materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of low quantum efficiency, hindering research, weak absorption of blue light, etc., and achieve high luminous efficiency, low synthesis cost and low cost low effect
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Embodiment 1
[0052] This embodiment provides a Cr 3+ / Ni 2+ Co-doped broadband near-infrared phosphor material Mg 0.99 Ni 0.005 Cr 0.005 O, namely MgO: 0.5% Ni, 0.5% Cr, its preparation method is as follows: according to the above material composition design, the matrix is MgO, and ion Cr is doped 3+ and Ni 2+ The doping amount is 0.5mol%, accurately weigh magnesium oxide (MgO), nickel oxide (NiO) and chromium oxide (Cr 2 O 3 ), according to the stoichiometric ratio of each constituent element, weigh the above compound raw materials respectively, and the molar ratio of each element is Mg:Ni:Cr:O=0.99:0.005:0.005:1.
[0053] Put the above raw materials in an agate mortar and then add a small amount of ethanol (raw material 1g, ethanol 3mL) and grind for about 1 hour, make the raw materials fully mixed and then move it to a corundum crucible, cover it and place it in a high temperature reaction furnace for 2 hours at 1600 °C , and then naturally cooled to room temperature, and the s...
Embodiment 2
[0055] This embodiment provides a Cr 3+ / Ni 2+ Co-doped broadband near-infrared phosphor material Mg 0.985 Ni 0.01 Cr 0.005 O, that is, MgO: 1% Ni, 0.5% Cr, and its preparation method is as follows: according to the above material composition design, the matrix is MgO, and ion Cr is doped. 3+ and Ni 2+ The doping amounts of MgO were 0.5 mol% and 1 mol%, respectively, and accurately weighed magnesium oxide (MgO), nickel oxide (NiO) and chromium oxide (Cr 2 O 3 ), according to the stoichiometric ratio of each constituent element, weigh the above compound raw materials respectively, and the molar ratio of each element is Mg:Ni:Cr:O=0.985:0.01:0.005:1.
[0056] Put the above raw materials in an agate mortar and then add a small amount of ethanol (raw material 1g, ethanol 3mL) and grind for about 1 hour, make the raw materials fully mixed, then move it to a corundum crucible, cover it and place it in a high temperature reaction furnace and burn it at a high temperature of 1...
Embodiment 3
[0058] This embodiment provides a Cr 3+ / Ni 2+ Co-doped broadband near-infrared phosphor material Mg 0.985 Ni 0.005 Cr 0.01 O, namely MgO: 0.5% Ni, 1% Cr, and its preparation method is as follows: according to the above material composition design, the matrix is MgO, and ion Cr is doped. 3+ and Ni 2+ The doping amounts were 1 mol% and 0.5 mol%, respectively, and accurately weighed magnesium oxide (MgO), nickel oxide (NiO) and chromium oxide (Cr 2 O 3 ), according to the stoichiometric ratio of each constituent element, weigh the above compound raw materials respectively, and the molar ratio of each element is Mg:Ni:Cr:O=0.985:0.005:0.01:1.
[0059] Put the above raw materials in an agate mortar and then add a small amount of ethanol (raw material 1g, ethanol 3mL) and grind for about 1 hour, make the raw materials fully mixed, then move to a corundum crucible, cover and place in a high temperature reaction furnace and burn at 1350 ℃ for 20 hours , and then naturally co...
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