Blue-light-excited fluorine manganite red-light-emitting material and preparation method and application thereof

A fluoromanganate, blue light excitation technology, applied in luminescent materials, chemical instruments and methods, electrical components and other directions, can solve the problems of complex experimental process, many steps, improve the defects of the material itself, etc., to achieve simple and easy preparation process, Mild conditions and improved photochromic performance

Active Publication Date: 2018-11-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The red light materials mentioned in the above reports are all doped with other luminescent activating ions. The experimental process is relatively complicated and there are many steps. In addition, doping will inevitably increase the defects of the material itself.

Method used

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  • Blue-light-excited fluorine manganite red-light-emitting material and preparation method and application thereof
  • Blue-light-excited fluorine manganite red-light-emitting material and preparation method and application thereof
  • Blue-light-excited fluorine manganite red-light-emitting material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment K 2 MnF 6 The co-precipitation method of the red light material is prepared, and the specific preparation steps are as follows:

[0028] Weigh 10g KHF 2 Dissolve in 50ml of hydrofluoric acid solution with a mass fraction of 49%, add 1g KMnO 4 , stir until the solids are all dissolved, gradually add 30% hydrogen peroxide solution dropwise until the solution turns from purple to yellow, stop the drop immediately, collect the precipitated sample by filtration, wash with acetone for 3 times, and dry at 80°C 2h, get K 2 MnF 6 red light material.

[0029] K obtained in this example 2 MnF 6 The XRD diffraction pattern of the red light material is as follows figure 1 shown by figure 1 It can be seen that the diffraction peak of the sample is consistent with that of the standard card JCPDS 77-1301 (K 2 MnF 6 ), there is no heterophase diffraction peak, indicating that the synthesized red light material sample is a pure phase.

[0030] K obtained in th...

Embodiment 2

[0032] In this example Cs 2 MnF 6 The red light material is prepared by the ion exchange method, and the specific preparation steps are as follows:

[0033] Weigh 2.46g K 2 MnF 6 Add to 10ml 40% hydrofluoric acid solution, add 6.06g CsF to react for 30 minutes, the obtained sample is filtered, washed and dried to obtain CsF 2 MnF 6 red light material.

[0034] Cs obtained in this example 2 MnF 6 The XRD diffraction pattern of the red light material is as follows image 3 shown by image 3 It can be seen that the diffraction peak of the sample is consistent with the standard card JCPDS 77-1301 (Cs 2 MnF 6 ), there is no heterophase diffraction peak, indicating that the synthesized red light material sample is a pure phase.

[0035] Cs obtained in this example 2 MnF 6 The room temperature excitation and emission spectra of red light materials are shown in Figure 4 shown by Figure 4 It can be seen that the sample has strong broadband excitation peaks in the ultra...

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Abstract

The invention belongs to the field of light-emitting materials and discloses a blue-light-excited fluorine manganite red-light-emitting material and a preparation method and application thereof. The chemical formula of the blue-light-excited fluorine manganite red-light-emitting material is A2MnF6, wherein A is optional one of or the combination of more than two of Li, Na, K, Rb, Cs and NH4. The preparation method includes: dissolving AHF2 into a hydrofluoric acid solution, adding KMnO4, stirring to achieve uniform dissolving, dropwise adding a hydrogen peroxide solution to perform coprecipitation reaction, filtering to collect precipitates, and washing and drying to obtain the A2MnF6 red-light-emitting material. The fluorine manganite red-light-emitting material is good in light-emittingperformance, capable of effectively improving the photochromic performance of a white-light LED, capable of lowering color temperature and increasing color rendering index and applicable to the fieldsof white-light LED lighting and backlight display.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a blue-light-excited fluoromanganate red-light material and a preparation method and application thereof. Background technique [0002] Compared with traditional lighting sources such as incandescent lamps and fluorescent lamps, white LEDs have outstanding advantages such as low heat generation, low power consumption, fast response, no flicker, and long life, and are known as a new generation of solid-state lighting sources. The current mainstream commercial white LED consists of blue chip and yellow phosphor Y 3 al 5 o 12 : Ce 3+ (YAG:Ce 3+ ) combined and packaged. This type of white light LED lacks red light components in the emission spectrum, resulting in a high color temperature of the light source (CCT>4000K) and a low color rendering index (CRI, Ra<80), which is difficult to meet indoor lighting requirements. Mainstream commercial backlight white...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61H01L33/50
CPCC09K11/616H01L33/502Y02B20/00
Inventor 宋恩海周亚运王媛婧张勤远
Owner SOUTH CHINA UNIV OF TECH
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