Holmium-and-ytterbium-codoped lead fluoride up-conversion luminescent material, and preparation method and application thereof
A technology of luminescent materials and lead fluoride, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc.
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[0027] The preparation method of the above-mentioned holmium-ytterbium-doped lead fluoride up-conversion luminescent material comprises the following steps:
[0028] Step S11, according to PbF 4 :xHo 3+ ,yYb 3+ The stoichiometric ratio of each element is weighed as PbF 4 , HoF 3 and YbF 3 Powder, wherein, x is 0.01-0.08, and y is 0-0.1.
[0029] In this step, preferably, x is 0.05 and y is 0.06.
[0030] Step S13, mix the powder weighed in step S11 and dissolve it in an acidic solution containing fluorine for crystallization treatment to obtain crystals, dissolve the crystals in a solvent, then add ammonia water to adjust the pH value to 1-6, and obtain a mixed solution.
[0031] In this step, preferably, the fluorine-containing acidic solution includes hydrofluoric acid, ammonium fluoride or ammonium bifluoride;
[0032] In this step, preferably, the solvent is distilled water or a mixed solution of distilled water and absolute ethanol.
[0033] Step S15, transfer th...
Embodiment 1
[0042] Choose PbF 4 , HoF 3 and YbF 3The powder is mixed according to the molar number of each component being 0.89mmol, 0.05mmol and 0.06mmol. After mixing, it is dissolved in a hydrofluoric acid solution for crystallization treatment to obtain crystals, and then the crystals are dissolved in distilled water and ammonia water is added to the solution to adjust the pH value to 5. Then the mixed solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and kept at 300°C for 3 hours to obtain a precipitate. Then the obtained precipitate was repeatedly washed with ethanol and distilled water, and evaporated to dryness at 100°C to obtain a chemical formula of PbF 4 : 0.05Ho 3+ ,0.06Yb 3+ up-converting phosphors.
[0043] Preparation of organic light-emitting diodes The substrate 1 stacked in sequence uses soda-lime glass, the cathode 2 uses a metal Ag layer, and the organic light-emitting layer 3 uses Ir(piq)2(acac) Chinese name is two...
Embodiment 2
[0048] Choose PbF 4 , HoF 3 and YbF 3 The powder is mixed according to the molar number of each component being 0.82mmol, 0.08mmol and 0.1mmol. After mixing, it is dissolved in nitric acid solution for crystallization treatment to obtain crystals, and then the crystals are dissolved in distilled water and ammonia water is added to the solution to adjust the pH value to 1. Then the mixed solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and kept at 150°C for 2h to obtain a precipitate. Then the obtained precipitate was repeatedly washed with ethanol and distilled water, and evaporated to dryness at 100°C to obtain a chemical formula of PbF 4 : 0.08Ho 3+ ,0.1Yb 3+ up-converting phosphors.
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