A kind of double excitation double emission phosphor and preparation method and application method thereof
A fluorescent powder and dual-emission technology, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve the problems of low photoresponse and low photoelectric conversion efficiency of Si-based thin-film solar cells
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example 1
[0014] Example 1: Ca 0.95 ZnO 0.95 f 0.05 S 0.9 Se 0.1 :0.03% 2+ , 0.1% 2+ , 0.05Li +
[0015] The product is synthesized by high temperature solid phase reaction. Weigh CaCO according to stoichiometric ratio 3 9.5g, ZnS 9.7g, Se powder 0.789g, Eu 2 o 3 5.28mg, CuO 7.95mg, LiF 1.297g, H 3 BO 3 0.2g. After the ingredients are ground, put them into a quartz crucible, push the crucible into a tube-type high-temperature furnace, and seal it. First pass nitrogen to drive away the air in the high-temperature furnace, then pass into nitrogen and hydrogen (95% N 2 +5%H 2 ) mixed gas, the temperature was programmed to rise to 1100°C for 8 hours. Heating was then stopped, and nitrogen was continued to cool to room temperature. The product was taken out, washed three times with deionized water, and dried to obtain the phosphor product.
[0016] The characteristic excitation and emission spectra of phosphors are as figure 1 shown. Phosphor powder can convert ultraviole...
example 2
[0017] Example 2: CaZnOS: 0.008% Eu 2+ , 0.1% Cu 2+
[0018] The product is synthesized by high temperature solid phase reaction. Weigh CaCO according to stoichiometric ratio 3 10.0g, ZnS 9.75g, Eu 2 o 3 1.41mg, CuO 7.95mg, H 3 BO 3 0.2g. After the ingredients are ground, put them into a quartz crucible, push the crucible into a tube-type high-temperature furnace, and seal it. First pass nitrogen to drive away the air in the high-temperature furnace, then pass into nitrogen and hydrogen (95% N 2 +5%H 2 ) mixed gas, the temperature was programmed to burn at 1000°C for 9 hours. Heating was then stopped, and nitrogen was continued to cool to room temperature. The product was taken out, washed three times with deionized water, and dried to obtain the phosphor product. Under excitation at 330nm, the phosphor simultaneously emits blue-green and red light (such as figure 2 shown), compounded to obtain white light emission, the color coordinates are (0.330, 0.284), which...
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