Preparation method of red light emitting fluorescent powder

Abstract

The invention relates to a preparation method of red light emitting fluorescent powder. By aiming at the conditions of difficult film forming of red light fluorescent powder and poor ultraviolet light resistant performance, 2-thenoyltrifluoroacetone-phenanthroline-methacrylic acid-europium and (4-vinyl phenyl) trimethoxy silane is used as raw materials to prepare the red light emitting fluorescent powder through solution preparation, polymerization reaction, washing, suction filtration, vacuum freeze drying, grinding and screening. The preparation method has the advantages that the process is advanced; the data is precise, full and accurate; the prepared powder body material has high precision and good purity; the purity reaches 9.2 percent; the powder body particle diameter is less than or equal to 800nm; the chromaticity coordinate X is 0.625; Y is 0.308; red light is emitted out; the materials can be matched with blue and green luminous materials to be prepared into white light emitting light emitting diodes; the preparation method belongs to an advanced red light emitting fluorescent powder preparation method.

Description

technical field [0001] The invention relates to a method for preparing a phosphor powder emitting red light, and belongs to the technical field of preparation and application of luminescent materials. Background technique [0002] Silicone is the mainstream material of LED packaging materials, with Si-O-Si bond as the main chain and side chains containing organic groups, which have excellent heat resistance, UV resistance and processing performance. [0003] White light-emitting diodes (LEDs) are known as the fourth-generation green light sources because of their small size, low energy consumption, and long life, and have been widely used in industrial and civilian products. [0004] White light is a kind of composite light, which can be compounded by ultraviolet light to excite phosphors of red, green and blue three primary colors to obtain white light. Its color temperature and color rendering performance depend on the content of red light components. The role of color co...

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Problems solved by technology

[0005] At present, the synthesis of red light phosphors is mainly based on the rare earth metal Eu as the central ion and the polymer material as the matrix to prepare red light materials. Although its luminous performance has been improved, there are still LED light-emitting layer phosphors made of it. Defects of difficult film formation, poor UV resistance, and short device life

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