a dy 3+ doped na 5 y(moo 4 ) 4 Warm white fluorescent powder and preparation method thereof

A fluorescent powder and warm white light technology, applied in chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve problems such as agglomeration or insufficiently uniform composition, uneven distribution, high synthesis temperature, etc., and achieve the goal of reducing air pollutants Produce, avoid the influence of luminous performance, reduce the effect of synthesis temperature
CN112646578BActive Publication Date: 2022-07-08CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Publication Date
2022-07-08

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Abstract

The present invention relates to a Dy 3+ Doping with Na 5 Y(MoO 4 ) 4 The invention relates to a warm white fluorescent powder and a preparation method thereof, belonging to the technical field of luminescent materials. The chemical formula of phosphor powder is: Na 5 Y 1‑x (MoO 4 ) 4‑y (WO 4 ) y :xDy 3+ ; Among them, 0.01≤x≤0.07, 0.04≤y≤0.20. Using Na 5 Y(MoO 4 ) 4 as the matrix, with Dy 3+ For the luminous center, through Dy 3+ The yellow light and blue light emitted by ions are combined with white light, and the luminescent properties of the phosphors are significantly enhanced after the anion structure is replaced; the samples are synthesized by the soft chemical method of the citric acid sol combustion method, which avoids the multiple high-temperature calcination of the high-temperature solid-phase method. It also avoids the defects of easy agglomeration and irregular morphology of the particles obtained by the co-precipitation method.
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Description

technical field

[0001] The present invention relates to a Dy 3+ Doping with Na 5 Y(MoO 4 ) 4 A warm white light phosphor and a preparation method thereof belong to the technical field of luminescent materials. Background technique

[0002] As a new generation of lighting sources, white LEDs have very broad application prospects and have been widely used in signal lights, display screens, LCD backlights and other fields. Compared with traditional lighting sources such as incandescent lamps and fluorescent lamps, white LEDs have obvious advantages such as high luminous efficiency, energy saving and environmental protection, long service life, and good color rendering. Currently, commercial white LEDs are fabricated by coating yellow YAG:Ce phosphors on blue InGaN chips. However, the lack of red light emission, resulting in low color rendering index (CRI) and high color temperature (CCT), greatly hinders the application of white LEDs. Another approach to making white LEDs...

Claims

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