Quantum dot luminescence transparent casting glue composite material
A technology of quantum dot light-emitting and composite materials, applied in the field of quantum dot light-emitting transparent potting compound materials, can solve the problems of low energy conversion efficiency, less red components, and low color rendering index of LED white light, so as to improve the luminous efficiency and Color rendering, simple preparation method, and the effect of optimizing the packaging structure
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[0022] Example 1
[0023] a. Preparation of quantum dot luminescent materials
[0024] Preparation of ZnO by sol-gel method 2 Quantum dot nanomaterials, add 0.75g zinc nitrate hexahydrate, 2.5mL analytically pure ethyl orthosilicate, and 0.15g urea to 50mL absolute ethanol solution and stir evenly, then adjust the pH with 1M nitric acid to make The pH value of the above-mentioned mixed solution is 3. After 10 hours of stirring and reaction, a transparent solution is formed. After the absolute ethanol in the solution is completely volatilized at room temperature, the formed white substance is dried at 100°C for 2 hours, and finally The prepared material is annealed at a temperature between 300° C. and 700° C. for 3 hours to prepare ZnO quantum dot nanomaterials.
[0025] b. Surface modification of quantum dot luminescent materials
[0026] Dissolve 5 mg of sodium lauryl sulfate with a purity greater than 95% in 25 mL of absolute ethanol, stir quickly to make it uniform, add 30 mg o...
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[0029] Example 2
[0030] a. Preparation of quantum dot luminescent materials
[0031] The CdSe-Cu quantum dot nanomaterial was prepared by the sol-gel method, and 0.17gCuCl 2 ·2H 2 O and 0.29gCd(CH 3 COO) 2 ·2H 2 After mixing O, dissolve it in 150mL analytically pure N,N-dimethylformamide, add 1.5mL analytically pure mercaptoethanol, and then add 1mL sodium selenite solution with a solubility of 20% dropwise within 5 minutes Slowly add to the above-mentioned mixed solution, reflux the final solution for 3 hours, dissolve it in anhydrous ethanol 3 times, centrifuge, and dry it in a vacuum drying oven at 80°C for 2 hours to prepare the CdSe-Cu quantum dot luminescent material , Its quantum dot size is below 10nm, can emit white light with a peak of about 550nm under the excitation of 460nm blue light, and the pressure of the vacuum drying box is controlled below 200Pa.
[0032] b. Surface modification of quantum dot luminescent materials
[0033] Dissolve 30 mg of CdSe-Cu quantum d...
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