Light-emitting diode
A technology for light-emitting diodes and exciting light sources, which can be used in luminescent materials, sustainable buildings, electrical components, etc., and can solve the problems of low luminous efficiency, poor color rendering and display color temperature, and achieve high luminous efficiency, stable chromaticity, and stable wavelength Effect
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Embodiment 1
[0091] Embodiment 1 (green phosphor solid-state reaction method):
[0092] One, get 5.0 grams of calcium carbonate (CaCO3) respectively according to the stoichiometric ratio 3 ), 1.83 grams of silicon dioxide (SiO 2 ), 0.5860 grams of europium oxide (Eu 2 o 3 ), 0.4141 grams of dysprosium oxide (Dy 2 o 3 ) and 1.1185 grams of magnesium oxide (MgO), the weighed raw materials are uniformly mixed in a grinding manner. Then add an appropriate amount of HCl, so that the formula formed is Ca 7.8 Mg(SiO 4 ) 4 Cl 2 :Eu 0.12 Dy 0.08 .
[0093]2. Put the mixture into a crucible and heat it to 1200° C. in nitrogen at a heating rate of 5° C. / min for calcinations. After 6 hours, cool it to room temperature at a cooling rate of 5° C. / min.
[0094] 3. Grind the calcined powder, put it in a crucible and sinter at 1200° C. for 5 hours in the air. The heating and cooling rate of the sintering process is still 5° C. / min.
[0095] 4. Grind the sintered powder and put it in H 2 / N 2...
Embodiment 2
[0099] Embodiment 2 (magenta phosphor solid-state reaction method):
[0100] One, take 5.0 grams of strontium carbonate (SrCO3) respectively according to the stoichiometric ratio 3 ), 0.9970 grams of calcium carbonate (CaCO 3 ), 3.29 grams of silicon dioxide (SiO 2 ), 1.0515 grams of europium oxide (Eu 2 o 3 ) and 1.145 grams of manganese oxide (Mn 2 o 3 ), 2.007 grams of magnesium oxide (MgO), the raw materials weighed are uniformly mixed in a grinding manner. Then add an appropriate amount of HCl to form a formula (Sr 7.48 Ca 0.2 )Mg(SiO 4 ) 4 Cl 2 :Eu 0.12 mn 0.2 .
[0101] 2. Put the mixture into a crucible and heat it to 1250° C. in nitrogen at a heating rate of 5° C. / min for calcinations. After 6 hours, cool it to room temperature at a cooling rate of 5° C. / min.
[0102] 3. Grinding the calcined powder, placing it in a crucible and sintering at 1250° C. for 5 hours in the air. The heating and cooling rate of the sintering step is still 5° C. / min.
[0103] ...
Embodiment 3
[0107] Embodiment three (red phosphor solid-state reaction method):
[0108] One, get 0.8059 grams of calcium carbonate (CaCO3) respectively according to the stoichiometric ratio 3 ), 5.0 grams of strontium carbonate (SrCO 3 ), 3.6945 grams of sodium sulfide (Na 2 S), 1.6668 grams of europium oxide (Eu 2 o 3 ) and 0.3812 grams of samarium oxide (Sm 2 o 3 ), the weighed raw materials are uniformly mixed in a grinding manner, so that the formula formed is (Sr 0.78 Ca 0.17 )S:Eu 0.1 mn 0.015 .
[0109] 2. Put the mixture into a crucible and place it in H 2 / N 2 Calcinations and reductions were carried out at 1100°C in a reducing atmosphere of (15% / 85%), and cooled to room temperature at a cooling rate of 5°C / min after 6 hours.
[0110] 3. Grind the sintered powder, then put it in H 2 / N 2 Reduction (reduction) was performed at 1100° C. for 6 hours in a reducing atmosphere of (15% / 85%). This is the Eu in the sample 3+ ion reduction to Eu 2+ , so as to increase its...
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