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A kind of LED white light fluorescent powder and preparation method thereof

A fluorescent powder and white light technology, applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve the problems of low color rendering index and poor color reproduction, and achieve good repeatability, high yield and stable structure Effect

Active Publication Date: 2016-08-24
兰陵县创志电子商务有限责任公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current white light is mostly composed of yellow phosphor and LED blue light, which has problems such as poor color reproduction and low color rendering index.

Method used

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  • A kind of LED white light fluorescent powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 0.1 mmol 1,4-bis(imidazol-1-yl)benzene, 0.2 mmol 2,2'-dimethoxy-4,4'-biphenyldicarboxylic acid, 0.1 mmol manganese nitrate and 0.1 mmol europium nitrate in In a mixed solvent of 3mL acetonitrile, 6mL dimethylformamide and 6mL water, stir at room temperature to form a mixed solution A, then reflux the above mixed solution A at 75°C for 6 hours to obtain a mixed solution B, and then mix the mixed solution B was placed in a 25 mL hydrothermal reaction kettle, heated for 48 hours under solvothermal conditions of 160°C, and then cooled to room temperature at a rate of 5°C / hour to obtain the white light phosphor.

[0019] The structures of the above compounds were then characterized.

[0020] The phosphors were then subjected to structural characterization.

[0021] The X-ray diffraction data of the phosphor powder is on the Bruker Smart Apex CCD surface probe diffractometer, using MoK α Radiation (λ = 0.71073 Å), collected in ω-scan mode and corrected for Lp facto...

Embodiment 2

[0024] Dissolve 0.1 mmol 1,4-bis(imidazol-1-yl)benzene, 0.2 mmol 2,2'-dimethoxy-4,4'-biphenyldicarboxylic acid, 0.1 mmol manganese nitrate and 0.1 mmol europium nitrate in In a mixed solvent of 3mL acetonitrile, 6mL dimethylformamide and 6mL water, stir at room temperature to form a mixed solution A, then reflux the above mixed solution A at 75°C for 6 hours to obtain a mixed solution B, and then mix the mixed solution B was placed in a 25 mL hydrothermal reaction kettle, heated for 24 hours under solvothermal conditions of 180°C, and then cooled to room temperature at a rate of 4°C / hour to obtain the white light phosphor. The fluorescence spectrogram of this embodiment is as shown in Embodiment 1.

Embodiment 3

[0026] Dissolve 0.1 mmol 1,4-bis(imidazol-1-yl)benzene, 0.2 mmol 2,2'-dimethoxy-4,4'-biphenyldicarboxylic acid, 0.1 mmol manganese nitrate and 0.1 mmol europium nitrate in In a mixed solvent of 3mL acetonitrile, 6mL dimethylformamide and 6mL water, stir at room temperature to form a mixed solution A, then reflux the above mixed solution A at 75°C for 6 hours to obtain a mixed solution B, and then mix the mixed solution B was placed in a 25 mL hydrothermal reaction kettle, heated for 36 hours under solvothermal conditions of 170°C, and then cooled to room temperature at 2°C / hour to obtain the white light phosphor. The fluorescence spectrogram of this embodiment is as shown in Embodiment 1.

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Abstract

The invention relates to the field of LEDs, in particular to a white fluorescent powder for LEDs and a preparation method thereof. A white light fluorescent powder for LED, the chemical molecular formula of the fluorescent powder is C44H34N4O12MnEu. The synthesis method of the white light phosphor of the present invention is simple, and the structure of the obtained white light phosphor is stable; the white light phosphor of the present invention adopts a simple solvothermal synthesis method, and compared with the preparation method of the existing white light phosphor, this method does not require high temperature Roasting, high yield and good repeatability; when the white light phosphor of the present invention is excited by light with a wavelength of 350nm, it can emit light in the bands of 430nm, 500nm, 580nm, and 620nm, and these four bands are superimposed to realize in a single matrix white light emission.

Description

technical field [0001] The invention relates to the field of LEDs, in particular to a white fluorescent powder for LEDs and a preparation method thereof. Background technique [0002] Light Emitting Diode (LED, Light Emitting Diode) is a new type of light emitting device, it not only has low power consumption, long life, low working voltage, environmental protection, safety, fast response, high reliability, less maintenance, small size, weight Light and other advantages, and can emit blue light, green light, purple light or deep ultraviolet light, making LED white light a reality, is the high-tech direction of my country's development. However, the current white light is mostly composed of yellow phosphor and LED blue light, which has problems such as poor color reproduction and low color rendering index. Panchromatic single-matrix white phosphors can overcome the above problems to a certain extent. Therefore, the development of high-efficiency single-matrix white phosphors ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F19/00C09K11/06
CPCY02B20/00
Inventor 朱林
Owner 兰陵县创志电子商务有限责任公司
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