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A group of compound fluorescent materials and a preparation method thereof

A technology of compound fluorescence and compounds, which is applied in the directions of luminescent materials, chemical instruments and methods, electrical components, etc., to achieve the effect of improving the luminous intensity and the ability to resist thermal decay.

Active Publication Date: 2013-07-03
邓华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials still have the same difficulties and problems as the aforementioned Eu-activated red materials in terms of synthesis methods and corresponding material properties.

Method used

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  • A group of compound fluorescent materials and a preparation method thereof
  • A group of compound fluorescent materials and a preparation method thereof
  • A group of compound fluorescent materials and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Proportion: 5SiN 1.33 o 0.06 0.99SrN 0.67 ·CaN 0.67 0.01EuN 0.67 / 0.035Au. Weigh various raw materials whose purity is analytically pure or high-purity: Si 3 N 4 15.19 g, SrCO 3 9.49 g, CaCN 2 5.20 grams, Eu 2 o 3 0.11 grams, the above raw materials are fully mixed and ground evenly, then weigh 0.45 grams of high-purity Au powder with a particle size of 10-1000nm, put it into the mixture, mix well and grind evenly, then put it into an alumina crucible, put Into the pressure heat treatment furnace, in high-purity N 2 and H 2 Sintering at 1000-1800° C. for 4-8 hours under mixed atmosphere and 0-3 atmospheric pressure. The sintered powder is orange and emits orange-red light with a peak emission wavelength of 590nm. For the excitation and emission characteristics of the sample, see figure 2 .

Embodiment 2～12

[0084] Proportion: 5SiN 1.33 o 0.07 0.95SrN 0.67 ·CaN 0.67 0.05EuN 0.67 / xAu, 0.012≤x≤0.094. Weigh the ratio as Si 3 N 4 15.15 g, SrCO 3 9.09 g, CaCN 2 5.19 g, Eu 2 o 3 Eleven parts of 0.57 grams of analytically pure or high-purity raw materials, weighing 0.15 grams, 0.23 grams, 0.3 grams, 0.38 grams, 0.45 grams, 0.53 grams, 0.6 grams, and 0.75 grams of high-purity Au powders with a particle size of 10-1000 nm gram, 0.9 gram, 1.05 gram and 1.2 gram, and then the preparation method and steps of samples with different Au content are the same as in Example 1. The sintered powder is orange-red and emits red light. The emission characteristics and Au addition amount of each embodiment are shown in Table 1. As a control, a sample 5SiN without Au was also prepared 1.33 o 0.99 0.95SrN 0.67 ·CaN 0.67 0.05EuN 0.67 (x=0, labeled c1). The emission spectra of several typical samples in Examples 2-12 under the excitation of 460nm blue light are shown in image 3 .

[00...

Embodiment 13～23

[0090] Proportion: 5SiN 1.33 o 0.08 0.95SrN 0.67 ·CaN 0.67 0.05EuN 0.67 / xZn, 0.035≤x≤0.283. Weigh the ratio as Si 3 N 4 15.15 g, SrCO 3 9.09 g, CaCN 2 5.19 g, Eu 2 o 3 Eleven parts of 0.57 grams of analytically pure or high-purity raw materials, each of 0.15 grams, 0.23 grams, 0.3 grams, 0.38 grams, 0.45 grams, 0.53 grams, 0.6 grams, and 0.75 grams of high-purity Zn powder with a particle size of 10-1000 nm was weighed. gram, 0.9 gram, 1.05 gram and 1.2 gram, and then the preparation method and steps of samples with different Zn content are the same as in Example 1. The sintered powder is orange-red and emits red light. See Table 2 for the emission characteristics of each embodiment and the amount of Zn added. Also take the sample 5SiN without Zn 1.33 o 0.09 0.95SrN 0.67 ·CaN 0.67 0.05EuN 0.67 (c1) served as a control. The emission spectra of several typical samples in Examples 13-23 under the excitation of 460nm blue light are shown in Figure 4 .

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Abstract

The invention provides a group of novel compound fluorescent materials and a preparation method thereof. Each compound fluorescent material is composed of a main phase and a second phase, wherein the main phase is coordinated by taking nitrogen as an anion and takes rare earth as an active ion, and the second phase is of nitrogen inert metal simple substances such as Co, Rh, Ir, Cu, Au, Ag, Ni, Pd, Pt, Ru, Os and Zn. Low phonon energy nitrogen inert metal simple substance is distributed in a main phase crystal domain or on a crystal domain boundary in a fluorescence main phase crystal domain structure in the form of a second phase micro crystal domain, so that the luminescent intensity and the heat decay resistance of the fluorescent phase are improved. The compound fluorescent material is prepared by using the calcium cyanamide thermal reduction nitridation reaction process which takes the particles of the nitrogen inert metal simple substances as seed crystals, can be excited by UV-blue-green light to obtain red light or green-orange light emission, and can be used for manufacturing high-efficiency LED devices.

Description

technical field [0001] The invention relates to a group of novel composite fluorescent materials for semiconductor light-emitting devices, which can be excited by ultraviolet-blue-green light chips with emission wavelengths in the range of 300-550 nm, absorb at least part of the light emitted by the excitation light source, and emit at a wavelength of 500 nm The red light, green light, yellow light or orange light within the range of ~700nm belongs to the field of lighting technology, display and optoelectronics. Background technique [0002] The semiconductor lighting and display technology realized by using light-emitting diodes has many advantages such as extremely small power consumption, environmental friendliness, long life and flexible application. At present, the way to realize semiconductor lighting and display is mainly based on phosphor conversion technology that excites fluorescent materials of various colors through ultraviolet-blue-green chips. For example, us...

Claims

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Application Information

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IPC IPC(8): C09K11/59C09K11/64C09K11/87H01L33/50
Inventor 刘海军
Owner 邓华
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