WO2019095463A1 - Magnetic fluorescent powder composite and plane coating method therefor - Google Patents

Magnetic fluorescent powder composite and plane coating method therefor Download PDF

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WO2019095463A1
WO2019095463A1 PCT/CN2017/114918 CN2017114918W WO2019095463A1 WO 2019095463 A1 WO2019095463 A1 WO 2019095463A1 CN 2017114918 W CN2017114918 W CN 2017114918W WO 2019095463 A1 WO2019095463 A1 WO 2019095463A1
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magnetic
phosphor
chip
different
fluorescent powder
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PCT/CN2017/114918
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French (fr)
Chinese (zh)
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李立勉
李立群
李妙姿
陈育
黄梓龙
文尚胜
吴露锶
辜月纯
余奕伟
苏彬锋
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广东金源照明科技股份有限公司
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/508—Wavelength conversion elements having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements

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  • the invention belongs to the field of optoelectronic technology, and in particular relates to a magnetic phosphor composite material and a planar coating method thereof.
  • a light emitting diode is an electroluminescent device.
  • the core part is composed of a P-type semiconductor and an N-type semiconductor. It can directly convert electrical energy into light energy. It has environmental protection, low cost, high luminous brightness and long service life. A series of advantages, such as long-term, is known as the green lighting energy of the 21st century.
  • the mainstream high-power white LED is made by coating a blue phosphor chip (GaN) with a yellow phosphor (YAG or TAG). Part of the light emitted by the chip excites the phosphor layer to produce yellow light, and the other part is blue light and yellow light. White light after mixing.
  • the LED obtained in this way has become a research hotspot at home and abroad due to its high luminous efficiency, low price and high reliability.
  • a conventional phosphor coating method is a dispensing method. This coating process uses a fine needle-like tool to coat the phosphor powder on the surface of the chip, and after it is flow-formed, it is sent to a curing device for heat curing, and ideally a spherical crown-like coating is formed.
  • the structure of the phosphor layer prepared by this method is non-uniform in structure, which makes the spatial uniformity of the LED color of the LED poor, and since the phosphor density is greater than that of the silica gel material, the particle precipitation phenomenon is easily caused, and the light is backscattered. Come back, that is, the light energy is absorbed by the chip and the substrate, and the light extraction efficiency is lowered.
  • the spectrum of the luminescence is monotonous, which makes it difficult to adjust the optical parameters such as the color temperature of the lamp.
  • the phosphor since the phosphor is in direct contact with the chip, the chip is in a closed environment, and the heat generated when the light is emitted is difficult to be emitted in time, resulting in an increase in the junction temperature of the LED, and the temperature of the chip is transmitted to the phosphor layer, which causes the phosphor to accelerate. Aging, luminous efficiency and reliability are reduced. Ultimately affects the luminous efficiency and reliability of the luminaire.
  • remote coating technology and multilayer phosphor structure have been introduced into the packaging technology of LED chips in recent years.
  • the remote coating technology uses the design of the phosphor layer away from the chip to improve the heat dissipation performance.
  • the multi-layer phosphor structure a phosphor layer with different emission spectra can be prepared on the chip, thereby enriching the spectral distribution of the LED lamp to achieve The purpose of changing the optical parameters of the luminaire.
  • the preparation of multilayer phosphor structures is usually carried out by layer coating, that is, coating and curing of a layer of phosphor is completed first, followed by preparation of the second layer.
  • Phosphor By analogy, the film formation cycle is long, which is not conducive to integrated production.
  • the phosphor layer is separately coated with the protective glue, and is easy to fall off at the later stage; the coating of the multi-layer phosphor is carried out by a layer spin coating method, which takes a long time, and the phosphor layer remains before the curing is completed. Part of the phenomenon of particle precipitation occurs; the conventional white LED is made by coating a blue phosphor chip on the blue LED chip, and part of the light emitted by the chip excites the phosphor layer to produce yellow light, which is mixed with the blue color emitted by the chip to generate white light.
  • the overall efficacy of the white LED is not high.
  • the present invention provides a magnetic phosphor composite material and a planar coating method thereof, the object of which is to prepare a phosphor layer by using a magnetic fluorescent bifunctional composite, and effectively increase the phosphor by combining an external magnetic field.
  • the uniformity of particle distribution solves the problem of delamination of phosphor layer and encapsulant, optimizes the process of planar coating of multi-layer phosphor, and shortens the fabrication cycle.
  • the present invention provides an improved method of phosphor coating, comprising the following steps:
  • a planar coating method for a magnetic phosphor composite material comprising the following steps:
  • the phosphor particles with different luminescent properties are concentrated at different heights of the silica gel, and the solidification is performed after the distribution is stable;
  • the encapsulant described in step 1 is an epoxy colloid or a silica gel colloid, which can be directly mixed with the magnetic phosphor composite material; or a powdery filler is added to obtain a colloid with improved refractive index, and then combined with the magnetic phosphor.
  • the composite material is mixed; the powder filler is one or more of fused quartz, fluorite, and glass microbeads.
  • the LED chip in step 2 is one or more of a blue LED chip, a red LED chip, a yellow LED chip, a green LED chip, and a violet LED chip; and may be a single LED chip or a group of LEDs. A combination of chips.
  • the substrate according to the second step may be made of aluminum, copper, alloy, silicon carbide, aluminum nitride or epoxy resin.
  • the coating method described in step 3 may be spin coating, spraying, deposition, printing.
  • the external magnetic field described in step 4 is a magnet having a certain shape, which may be one or more of a horseshoe shape, a spherical shape, an annular shape, and a planar shape; it may be a single magnet or a combination of a group of magnets.
  • the magnetic phosphor powder obtained in the step 3 is adsorbed to different positions in the colloid by the action of the external magnetic field obtained in the step 4, and after the distribution is stabilized, the thermal curing is performed simultaneously.
  • the peripheral optical component in the step 6 is a lens whose outer surface is a free curved surface, and is used for controlling light and achieving uniform illumination; the inner surface thereof may be rectangular, hemispherical or cylindrical; the material of the lens is One or more of polycarbonate, silica gel or glass.
  • a magnetic phosphor composite material which comprises a ferroferric oxide as a magnetic core, a silica as a coupling agent, and a rare earth-doped inorganic fluorescent material as a magnetic fluorescent bifunctional composite;
  • the magnetic core has a particle size of 50 ⁇ 200nm;
  • the coupling agent has good biocompatibility, can reduce the quenching effect of the ferroferric oxide on the phosphor, the thickness is 10-20 nm;
  • the fluorescent material is one or more of a red phosphor, a green phosphor, a yellow phosphor, and a blue phosphor, and has a thickness of 20 to 40 nm;
  • the magnetic phosphor composite material, the rare earth-doped inorganic fluorescent material with different luminescent properties should be coated with magnetic cores of different particle sizes to obtain a magnetic fluorescent bifunctional composite having different magnetic properties;
  • the magnetic cores of different particle sizes are obtained by adding a surface modifier during the preparation of the ferroferric oxide;
  • the surface modifier is hydrochloric acid, hydrogen peroxide, ferric chloride or oleic acid.
  • the magnetic fluorescent bifunctional composites of different magnetic sizes may also be obtained by coating one or two or three or different numbers of magnetic cores with a coupling agent.
  • the red phosphor is a fluorescent material mainly composed of a sulfide system, a nitride system or a tungsten/molybdate system;
  • the green phosphor is a thiogallate system, an oxynitride system or silicon.
  • the acid salt system is a fluorescent material of a main body;
  • the blue phosphor is a fluorescent material mainly composed of YAG, TAG, an oxynitride system, a halophosphate system or a silicate system.
  • the magnetic fluorescent bifunctional complex can be prepared by a sol-gel method, a microemulsion method, a coprecipitation method or a solvothermal method.
  • the invention provides an improved method for the planar coating of phosphors, which has the following advantages:
  • the LED light source excites a plurality of phosphors having different luminescent properties to emit light of different wavelengths, and the spectral distribution is wider;
  • the effect of external magnetic field can be used to achieve the uniform distribution of the same type of phosphor powder and the controllable effect of layered arrangement of different types of phosphors, and the preparation of multi-layer phosphors can be completed at one time to improve production efficiency. At the same time solve the problem of phosphor precipitation;
  • the glue directly acts as a protective glue for the LED chip, and at the same time separates the chip from the phosphor layer to avoid the problem that the heat of the chip is directly transmitted to the phosphor layer, which causes accelerated aging and reduced reliability.
  • the preparation of protective rubber and phosphor layer is achieved by one coating, so the adhesion between the phosphor layer and the protective rubber is better and better, and it is not easy to fall off in the later stage;
  • the combination of powder and external magnetic field can achieve the one-time coating of multi-layer phosphors by changing the magnetic properties of different phosphors to improve the light-emitting performance.
  • FIG. 1 is a schematic structural view of a first embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a second embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of the second embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a third embodiment of the present invention.
  • Figure 5 is a schematic view showing the structure of the third embodiment of the present invention.
  • Figure 6 is a schematic view showing the structure of the fourth embodiment of the present invention.
  • Figure 7 is a schematic structural view of Embodiment 5 of the present invention.
  • Figure 8 is a schematic structural view of Embodiment 5 of the present invention.
  • Figure 9 is a schematic view showing the structure of a fifth embodiment of the present invention.
  • Example 1 As shown in Fig. 1, the present invention provides an improved method for planar coating of phosphors comprising a total of five parts.
  • the substrate 1 is used to support the package structure of the entire LED; the flip-chip LED chip 2 is fixed on the substrate 1 by means of die bonding or eutectic soldering; the package glue 3 is mixed with a plurality of different kinds of magnetic fluorescent dual function composites 4;
  • the magnet 5 provides an external magnetic field to adsorb different fluorescent bifunctional composites 4 to different locations in the encapsulant 3.
  • the magnetic properties of a substance are measured by magnetic permeability, and the magnetic permeability of ferroferric oxide is affected by the particle size.
  • the magnetic size of the magnetic core can be adjusted in the following manner.
  • Method 1 Surface treatment of hydrochloric acid, hydrogen peroxide, ferric chloride or oleic acid, etc., to obtain particles of ferroferric oxide having different particle sizes, and adding a coupling agent such as silica to prevent the trioxide-to-phosphorus powder Quenching effect;
  • Mode 2 The couplant coats one, two or three different numbers of ferroferric oxide particles to obtain cores having different sizes of magnetism.
  • Embodiment 2 As shown in FIG. 2 and FIG. 3, different types of phosphors are used as outer casings, and ferroferric oxide having different magnetic properties obtained by the method 1 or 2 is coated to obtain magnetically polarized bifunctional composites having different magnetic properties. 4.
  • a powdery filler such as glass beads or the like may be added to the encapsulant to obtain a colloid having an improved refractive index, which is then mixed with the magnetic phosphor composite.
  • the magnetic fluorescent bifunctional composite 4 of different excitation wavelengths is emitted by the LED chip 2 After the light is excited, different wavelengths of light will be generated, and the white light will be emitted by mixing; the type of the magnetic fluorescent bifunctional composite 4 and its ratio with the encapsulant 3 can be adjusted according to the requirements of the luminaire for the spectral energy distribution to achieve the color temperature. Effective control of optical parameters such as color rendering index.
  • Embodiment 3 As shown in FIG. 4, different magnetic fluorescent bifunctional composites are adsorbed to different positions of the encapsulant layer by using an external magnetic field to realize hierarchical arrangement of phosphors: the yellow phosphor is located on the bottom layer. The green phosphor is in the middle layer and the red phosphor is on the top or other arrangement. After the phosphor particles are fixed in position, thermal curing is simultaneously performed to achieve coating of the phosphor layer.
  • the position of the underlying phosphor can be fixed in the middle of the encapsulant layer, and there is no phosphor distribution in the lower part of the encapsulant to realize the isolation of the phosphor layer from the chip, thereby effectively avoiding the degradation of the phosphor performance caused by the chip temperature.
  • the phosphor layer prepared by the method can directly use the bottom encapsulant as the protective glue of the chip, eliminating the injection of the protective glue in the traditional coating process, and simultaneously spraying and curing the protective glue and the phosphor layer. To avoid the problem of late fall off.
  • the peripheral optical component 7 is mounted to complete the packaging of the LED chip.
  • Embodiment 4 As shown in FIG. 6, the shape of the magnet can be changed, and the arrangement shape of the phosphor layer can be changed accordingly.
  • the shape of the magnet is not limited to the planar shape or the curved shape as shown in the drawing, and may be other.
  • the horseshoe shape, the conical shape, and the like are not limited to a single one, and may be a group of magnets to realize periodic arrangement of magnetic fluorescent particles.
  • Embodiment 5 As shown in FIG. 7 and FIG. 8, this method is applied to an integrated package multi-chip LED. A plurality of chips are fixed on the substrate by eutectic soldering or the like to form a connected circuit.
  • the magnetic fluorescent particles/encapsulated rubber composite material is directly coated on the surface of the chip by spraying method, and different magnetic fluorescent bifunctional composites are adsorbed to different positions of the encapsulant layer by the action of an external magnetic field to realize stratification of the phosphor powder. After the phosphor particles are fixed in position, the heat curing is simultaneously performed to complete the coating of the phosphor layer. Finally, the peripheral optical component 7 is mounted to complete the packaging of the multi-chip LED, as shown in FIG.

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  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

A magnetic fluorescent powder composite (4) and a plane coating method therefor, comprising the following steps: preparing a magnetic fluorescent powder composite (4), and mixing same with a packaging adhesive (3) in a certain ratio uniformly; fixing a flip LED chip (2) on a package substrate (1) to form a closed circuit; coating a mixture of the magnetic fluorescent powder and the adhesive obtained in the step above on the chip (2); using the action of an external magnetic field to concentrate fluorescent powder particles having different luminescence properties at different height positions of the silica gel, and curing same after the distribution of the particles is stabilized; and mounting a peripheral optical component (7). By using the action of the magnetic field, the fluorescent powder is allowed to locate at different height positions of the packaging adhesive (3), a remote coating process can be realized, and the packaging adhesive (3) at the bottom layer directly serves as a protective adhesive for the LED chip (2), and at the same time, the chip (2) and the fluorescent powder layer are separated, so as to avoid problems such as accelerated aging and decreased reliability caused by direct conduction of heat of the chip to the fluorescent powder layer.

Description

一种磁性荧光粉复合材料及其平面涂覆方法Magnetic phosphor composite material and plane coating method thereof 技术领域：Technical field:
本发明属于光电技术领域，具体涉及一种磁性荧光粉复合材料及其平面涂覆方法。The invention belongs to the field of optoelectronic technology, and in particular relates to a magnetic phosphor composite material and a planar coating method thereof.
背景技术：Background technique:
发光二极管(Light emitting diode)是一种电致发光器件，其核心部分是由P型半导体和N型半导体构成，可直接将电能转化为光能，具有环保、成本低、发光亮度高、使用寿命长等一系列优点，被誉为21世纪的绿色照明能源。A light emitting diode is an electroluminescent device. The core part is composed of a P-type semiconductor and an N-type semiconductor. It can directly convert electrical energy into light energy. It has environmental protection, low cost, high luminous brightness and long service life. A series of advantages, such as long-term, is known as the green lighting energy of the 21st century.
目前主流的大功率白光LED是通过在蓝光LED芯片(GaN)上覆盖一层黄色荧光粉(YAG或TAG)制成，芯片发出的部分光线激发荧光粉层产生黄光，另一部分蓝光与黄光混合后呈现白光。该方式所得LED因其光效高、价格低、可靠性高等优点，成为国内外的一大研究热点。At present, the mainstream high-power white LED is made by coating a blue phosphor chip (GaN) with a yellow phosphor (YAG or TAG). Part of the light emitted by the chip excites the phosphor layer to produce yellow light, and the other part is blue light and yellow light. White light after mixing. The LED obtained in this way has become a research hotspot at home and abroad due to its high luminous efficiency, low price and high reliability.
传统的荧光粉涂覆方式是点胶涂覆法。这种涂覆工艺采用细针头类工具将荧光粉胶涂覆在芯片表面，待其流动成型后送入固化设备中加热固化，理想情况下形成类似球冠状的涂层。但这种方法所制备的荧光粉层中心到边缘的结构性非均匀，使得LED发光颜色的空间均匀性差，并且由于荧光粉密度大于硅胶材料，容易造成颗粒沉淀现象，导致光会被后向散射回来，即光能量被芯片和基板吸收，出光效率降低。同时由于仅有一层荧光粉膜，发光的光谱较为单调，导致对灯具的色温等光学参数的调整难度较大。此外，由于荧光粉与芯片直接接触，使得芯片处于封闭环境中，其发光时所产生的热量难以及时地散发，导致LED结温升高，而芯片温度传导至荧光粉层，会导致荧光粉加快老化，发光效率和可靠性降低。最终影响灯具的发光效率和可靠性。A conventional phosphor coating method is a dispensing method. This coating process uses a fine needle-like tool to coat the phosphor powder on the surface of the chip, and after it is flow-formed, it is sent to a curing device for heat curing, and ideally a spherical crown-like coating is formed. However, the structure of the phosphor layer prepared by this method is non-uniform in structure, which makes the spatial uniformity of the LED color of the LED poor, and since the phosphor density is greater than that of the silica gel material, the particle precipitation phenomenon is easily caused, and the light is backscattered. Come back, that is, the light energy is absorbed by the chip and the substrate, and the light extraction efficiency is lowered. At the same time, since there is only one layer of phosphor film, the spectrum of the luminescence is monotonous, which makes it difficult to adjust the optical parameters such as the color temperature of the lamp. In addition, since the phosphor is in direct contact with the chip, the chip is in a closed environment, and the heat generated when the light is emitted is difficult to be emitted in time, resulting in an increase in the junction temperature of the LED, and the temperature of the chip is transmitted to the phosphor layer, which causes the phosphor to accelerate. Aging, luminous efficiency and reliability are reduced. Ultimately affects the luminous efficiency and reliability of the luminaire.
为提高光源的品质及可靠性，近几年远程涂覆技术和多层荧光粉结构开始被引入LED芯片的封装技术中。远程涂覆技术采用荧光粉层远离芯片的设计，从而改善散热性能；而利用多层荧光粉结构，可以在芯片上制备具有不同发射光谱的荧光粉层，从而丰富LED灯具的光谱分布，以达到改变灯具光学参数的目的。但同时也存在以下问题：(1)远离涂覆技术采用荧光粉层单独成膜的方法，成膜后的荧光粉层与芯片经封装胶贴合在一起，封装胶与荧光粉层的附着程度难以保证，后期容易出现脱落现象；(2)采用喷涂、旋涂或沉积等方式制备荧光粉层，荧光粉颗粒的沉淀现象虽能够得到一定程度的改善，但在其完成固化之前，仍有部分颗粒沉淀，无法实现颗粒的均匀分布；(3)目前多层荧光粉结构的制备，通常采用层层涂布的方式，即先完成一层荧光粉的涂覆、固化，再接着制备第二层荧光粉， 依次类推……成膜周期长，不利于一体化生产。In order to improve the quality and reliability of the light source, remote coating technology and multilayer phosphor structure have been introduced into the packaging technology of LED chips in recent years. The remote coating technology uses the design of the phosphor layer away from the chip to improve the heat dissipation performance. With the multi-layer phosphor structure, a phosphor layer with different emission spectra can be prepared on the chip, thereby enriching the spectral distribution of the LED lamp to achieve The purpose of changing the optical parameters of the luminaire. However, at the same time, the following problems also exist: (1) The method of separately forming a film by using a phosphor layer away from the coating technology, the phosphor layer after the film formation and the chip are pasted together by the encapsulant, and the adhesion degree of the encapsulant and the phosphor layer It is difficult to ensure that the phenomenon of shedding is likely to occur in the later stage; (2) the phosphor layer is prepared by spraying, spin coating or deposition, although the precipitation phenomenon of the phosphor particles can be improved to some extent, but before it is cured, there are still some parts. The precipitation of particles does not achieve uniform distribution of particles; (3) the preparation of multilayer phosphor structures is usually carried out by layer coating, that is, coating and curing of a layer of phosphor is completed first, followed by preparation of the second layer. Phosphor, By analogy, the film formation cycle is long, which is not conducive to integrated production.
现有技术的实施方案：荧光粉层与保护胶分开涂覆，后期容易脱落；多层荧光粉的涂覆采用的是层层旋涂的方法，耗时长，且荧光粉层在完成固化之前仍会出现部分颗粒沉淀的现象；传统的白光LED通过在蓝光LED芯片上覆盖一层黄色荧光粉制成，芯片发出的部分光线激发荧光粉层产生黄光，与芯片发出的蓝色混合产生白光，但由于存在能量损耗，这种白光LED整体光效不高。The prior art embodiment: the phosphor layer is separately coated with the protective glue, and is easy to fall off at the later stage; the coating of the multi-layer phosphor is carried out by a layer spin coating method, which takes a long time, and the phosphor layer remains before the curing is completed. Part of the phenomenon of particle precipitation occurs; the conventional white LED is made by coating a blue phosphor chip on the blue LED chip, and part of the light emitted by the chip excites the phosphor layer to produce yellow light, which is mixed with the blue color emitted by the chip to generate white light. However, due to the energy loss, the overall efficacy of the white LED is not high.
发明内容：Summary of the invention:
针对现有技术的以上缺陷，本发明提供了一种磁性荧光粉复合材料及其平面涂覆方法，其目的在于：利用磁性荧光双功能复合物制备荧光粉层，结合外磁场作用有效提高荧光粉颗粒的分布均匀性，解决荧光粉层与封装胶脱层的问题，优化多层荧光粉平面涂覆的工艺，缩短制作周期。In view of the above defects of the prior art, the present invention provides a magnetic phosphor composite material and a planar coating method thereof, the object of which is to prepare a phosphor layer by using a magnetic fluorescent bifunctional composite, and effectively increase the phosphor by combining an external magnetic field. The uniformity of particle distribution solves the problem of delamination of phosphor layer and encapsulant, optimizes the process of planar coating of multi-layer phosphor, and shortens the fabrication cycle.
为实现以上目的，本发明提供了一种荧光粉平面涂覆的改进方法，包括如下步骤：To achieve the above object, the present invention provides an improved method of phosphor coating, comprising the following steps:
一种磁性荧光粉复合材料的平面涂覆方法，包括如下步骤：A planar coating method for a magnetic phosphor composite material, comprising the following steps:
①制备磁性荧光粉复合材料，并将其按一定比例与封装胶混合均匀；1 preparing a magnetic phosphor composite material and mixing it with the encapsulant at a certain ratio;
②将倒装LED芯片固定在封装基板上，形成连通的电路；2 fixing the flip-chip LED chip on the package substrate to form a connected circuit;
③将步骤①所得的磁性荧光粉胶混合物涂覆在芯片上；3 coating the magnetic phosphor paste mixture obtained in step 1 on the chip;
④利用外磁场的作用，将具有不同发光性质的荧光粉颗粒集中在硅胶的不同位置高度上，待其分布稳定后进行固化；4 using the action of the external magnetic field, the phosphor particles with different luminescent properties are concentrated at different heights of the silica gel, and the solidification is performed after the distribution is stable;
⑤安装外围光学部件。5 Install peripheral optical components.
进一步的，步骤①所述的封装胶是环氧类胶体或硅胶类胶体，可直接与磁性荧光粉复合材料混合；或加入粉末状填充物得到折射率改善的胶体，再将之与磁性荧光粉复合材料混合；所述粉末填充物为熔凝石英、荧石、玻璃微珠中的一种或多种。Further, the encapsulant described in step 1 is an epoxy colloid or a silica gel colloid, which can be directly mixed with the magnetic phosphor composite material; or a powdery filler is added to obtain a colloid with improved refractive index, and then combined with the magnetic phosphor. The composite material is mixed; the powder filler is one or more of fused quartz, fluorite, and glass microbeads.
进一步的，步骤②所述LED芯片为蓝光LED芯片、红光LED芯片、黄光LED芯片、绿光LED芯片、紫光LED芯片中的一种或多种；可为单个LED芯片，或一组LED芯片的组合。Further, the LED chip in step 2 is one or more of a blue LED chip, a red LED chip, a yellow LED chip, a green LED chip, and a violet LED chip; and may be a single LED chip or a group of LEDs. A combination of chips.
进一步的，步骤②所述的基板，其材质可为铝、铜、合金、碳化硅、氮化铝、环氧树脂。Further, the substrate according to the second step may be made of aluminum, copper, alloy, silicon carbide, aluminum nitride or epoxy resin.
进一步的，步骤③所述的涂覆方式可为旋涂、喷涂、沉积、印刷。Further, the coating method described in step 3 may be spin coating, spraying, deposition, printing.
进一步的，步骤④所述的外磁场为具有一定形状的磁铁，可为马蹄状、球状、圆环状、平面状中的一种或多种；可为单个磁铁，或一组磁铁的组合。 Further, the external magnetic field described in step 4 is a magnet having a certain shape, which may be one or more of a horseshoe shape, a spherical shape, an annular shape, and a planar shape; it may be a single magnet or a combination of a group of magnets.
进一步的，步骤③所得的磁性荧光粉胶，在步骤④所得外磁场的作用下，将具有不同磁性大小的磁性荧光颗粒吸附到胶体中的不同位置，待其分布稳定后，同步进行热固化，实现不同发光性质的荧光粉分层排布。Further, the magnetic phosphor powder obtained in the step 3 is adsorbed to different positions in the colloid by the action of the external magnetic field obtained in the step 4, and after the distribution is stabilized, the thermal curing is performed simultaneously. A layered arrangement of phosphors that achieve different luminescent properties.
进一步的，步骤⑥所述外围光学部件为外表面为自由曲面的透镜，用于控制光线和实现均匀照明的要求；其内表面可为矩形状、半球状或圆柱状；所述透镜的材质为聚碳酸酯、硅胶或玻璃中一种或多种。Further, the peripheral optical component in the step 6 is a lens whose outer surface is a free curved surface, and is used for controlling light and achieving uniform illumination; the inner surface thereof may be rectangular, hemispherical or cylindrical; the material of the lens is One or more of polycarbonate, silica gel or glass.
一种磁性荧光粉复合材料，以四氧化三铁为磁性核，二氧化硅为耦合剂，掺杂稀土的无机荧光材料为外壳的磁性荧光双功能复合物；所述磁性核粒径为50～200nm；所述耦合剂具有良好的生物相容性，能够减少四氧化三铁对荧光粉的淬灭作用，厚度为10～20nm；A magnetic phosphor composite material, which comprises a ferroferric oxide as a magnetic core, a silica as a coupling agent, and a rare earth-doped inorganic fluorescent material as a magnetic fluorescent bifunctional composite; the magnetic core has a particle size of 50 ～ 200nm; the coupling agent has good biocompatibility, can reduce the quenching effect of the ferroferric oxide on the phosphor, the thickness is 10-20 nm;
进一步的，所述荧光材料为红色荧光粉、绿色荧光粉、黄色荧光粉、蓝光荧光粉中的一种或多种，厚度为20～40nm；Further, the fluorescent material is one or more of a red phosphor, a green phosphor, a yellow phosphor, and a blue phosphor, and has a thickness of 20 to 40 nm;
进一步的，所述的磁性荧光粉复合材料，不同发光性质的掺杂稀土的无机荧光材料应包覆不同粒径大小的磁性核，以得到具有磁性大小不同的磁性荧光双功能复合物；Further, the magnetic phosphor composite material, the rare earth-doped inorganic fluorescent material with different luminescent properties should be coated with magnetic cores of different particle sizes to obtain a magnetic fluorescent bifunctional composite having different magnetic properties;
进一步的，所述不同粒径大小的磁性核通过在四氧化三铁的制备过程中加入表面改性剂获得；所述表面改性剂为盐酸、过氧化氢、氯化铁或油酸。Further, the magnetic cores of different particle sizes are obtained by adding a surface modifier during the preparation of the ferroferric oxide; the surface modifier is hydrochloric acid, hydrogen peroxide, ferric chloride or oleic acid.
进一步的，所述不同磁性大小的磁性荧光双功能复合物还可以通过耦合剂包覆一个或两个或三个或不同数目的磁性核得到。Further, the magnetic fluorescent bifunctional composites of different magnetic sizes may also be obtained by coating one or two or three or different numbers of magnetic cores with a coupling agent.
进一步的，所述红色荧光粉为以硫化物体系、氮化物体系或钨/钼酸盐体系为主体的荧光材料；所述绿色荧光粉为以硫代镓酸盐体系、氮氧化物体系或硅酸盐体系为主体的荧光材料；所述蓝色荧光粉为以YAG、TAG、氮氧化物体系、卤磷酸盐体系或硅酸盐体系为主体的荧光材料。Further, the red phosphor is a fluorescent material mainly composed of a sulfide system, a nitride system or a tungsten/molybdate system; the green phosphor is a thiogallate system, an oxynitride system or silicon. The acid salt system is a fluorescent material of a main body; the blue phosphor is a fluorescent material mainly composed of YAG, TAG, an oxynitride system, a halophosphate system or a silicate system.
进一步的，所述磁性荧光双功能复合物可通过溶胶-凝胶法、微乳热法、共沉淀法或溶剂热法方式制备。Further, the magnetic fluorescent bifunctional complex can be prepared by a sol-gel method, a microemulsion method, a coprecipitation method or a solvothermal method.
本发明提供一种荧光粉平面涂覆的改进方法，具有以下优点：The invention provides an improved method for the planar coating of phosphors, which has the following advantages:
1、LED光源激发多种具有不同发光性质的荧光粉发出不同波长的光，光谱分布更广；1. The LED light source excites a plurality of phosphors having different luminescent properties to emit light of different wavelengths, and the spectral distribution is wider;
2、采用具有磁性的荧光复合材料，利用外磁场的作用实现同种类荧光粉均匀分布、不同种类荧光粉分层排布的可控效果，一次性完成多层荧光粉的制备，提高生产效率，同时解决荧光粉沉淀的问题；2. Using a magnetic composite material with magnetic properties, the effect of external magnetic field can be used to achieve the uniform distribution of the same type of phosphor powder and the controllable effect of layered arrangement of different types of phosphors, and the preparation of multi-layer phosphors can be completed at one time to improve production efficiency. At the same time solve the problem of phosphor precipitation;
3、通过表面改性或包覆不同数量磁芯的方法实现磁性大小不同的磁性荧光粉的制备；3. Preparation of magnetic phosphors having different magnetic properties by surface modification or coating of different numbers of magnetic cores;
4、利用磁场作用使荧光粉位于封装胶的不同位置高度，可实现远程涂覆工艺，底层的封装 胶直接作为LED芯片的保护胶，同时将芯片和荧光粉层分隔开，避免因芯片的热量直接传导至荧光粉层导致其加速老化、可靠性降低的问题。4, using the magnetic field to make the phosphor at different heights of the encapsulant, can realize the remote coating process, the bottom package The glue directly acts as a protective glue for the LED chip, and at the same time separates the chip from the phosphor layer to avoid the problem that the heat of the chip is directly transmitted to the phosphor layer, which causes accelerated aging and reduced reliability.
5、利用磁性荧光粉与外磁场的配合，通过一次涂覆实现保护胶与荧光粉层的制备，因此荧光粉层与保护胶之间的粘合性更佳优越，后期不易脱落；利用磁性荧光粉与外磁场的配合，通过改变不同荧光粉的磁性大小，实现多层荧光粉的一次性涂覆，改善出光性能。5. Using the combination of magnetic phosphor and external magnetic field, the preparation of protective rubber and phosphor layer is achieved by one coating, so the adhesion between the phosphor layer and the protective rubber is better and better, and it is not easy to fall off in the later stage; The combination of powder and external magnetic field can achieve the one-time coating of multi-layer phosphors by changing the magnetic properties of different phosphors to improve the light-emitting performance.
附图说明DRAWINGS
附图1为本发明的实施例一结构示意图。1 is a schematic structural view of a first embodiment of the present invention.
附图2为本发明的实施例二结构示意图。2 is a schematic structural view of a second embodiment of the present invention.
附图3为本发明的实施例二结构示意图。Figure 3 is a schematic view showing the structure of the second embodiment of the present invention.
附图4为本发明的实施例三结构示意图。4 is a schematic structural view of a third embodiment of the present invention.
附图5为本发明的实施例三结构示意图。Figure 5 is a schematic view showing the structure of the third embodiment of the present invention.
附图6为本发明的实施例四结构示意图。Figure 6 is a schematic view showing the structure of the fourth embodiment of the present invention.
附图7为本发明的实施例五结构示意图。Figure 7 is a schematic structural view of Embodiment 5 of the present invention.
附图8为本发明的实施例五结构示意图。Figure 8 is a schematic structural view of Embodiment 5 of the present invention.
附图9为本发明的实施例五结构示意图。Figure 9 is a schematic view showing the structure of a fifth embodiment of the present invention.
具体实施方式Detailed ways
以下将对本发明的优选实施例进行详细的描述。Preferred embodiments of the present invention will be described in detail below.
实施例1：如图1所示，本发明提供一种荧光粉平面涂覆的改进方法，共包含5个部分。基板1用于支撑整个LED的封装结构；倒装LED芯片2通过固晶或共晶焊接的方式固定在基板1上；封装胶3中混有多种不同种类的磁性荧光双功能复合物4；磁铁5提供外磁场将不同荧光双功能复合物4吸附到封装胶3中的不同位置。Example 1: As shown in Fig. 1, the present invention provides an improved method for planar coating of phosphors comprising a total of five parts. The substrate 1 is used to support the package structure of the entire LED; the flip-chip LED chip 2 is fixed on the substrate 1 by means of die bonding or eutectic soldering; the package glue 3 is mixed with a plurality of different kinds of magnetic fluorescent dual function composites 4; The magnet 5 provides an external magnetic field to adsorb different fluorescent bifunctional composites 4 to different locations in the encapsulant 3.
物质磁性大小是以磁导率来衡量的，四氧化三铁的磁导率受颗粒大小影响。磁性核的磁性大小可以通过以下方式进行调节。方式1：通过盐酸、过氧化氢、氯化铁或油酸等进行表面处理可获得粒径大小不同的四氧化三铁粒子，并加入耦合剂如二氧化硅，防止四氧化三铁对荧光粉的淬灭作用；方式2：耦合剂包覆一个、两个或三个等不同数目的四氧化三铁颗粒，得到具有不同大小磁性的核。The magnetic properties of a substance are measured by magnetic permeability, and the magnetic permeability of ferroferric oxide is affected by the particle size. The magnetic size of the magnetic core can be adjusted in the following manner. Method 1: Surface treatment of hydrochloric acid, hydrogen peroxide, ferric chloride or oleic acid, etc., to obtain particles of ferroferric oxide having different particle sizes, and adding a coupling agent such as silica to prevent the trioxide-to-phosphorus powder Quenching effect; Mode 2: The couplant coats one, two or three different numbers of ferroferric oxide particles to obtain cores having different sizes of magnetism.
实施例2：如图2、图3所示，将不同种类的荧光粉作为外壳，包覆通过方式1或2得到的具有不同磁性的四氧化三铁，得到磁性不同的磁性荧光双功能复合物4。Embodiment 2: As shown in FIG. 2 and FIG. 3, different types of phosphors are used as outer casings, and ferroferric oxide having different magnetic properties obtained by the method 1 or 2 is coated to obtain magnetically polarized bifunctional composites having different magnetic properties. 4.
所述封装胶中可加入粉末状填充物如玻璃微珠等得到折射率改善的胶体，再将之与磁性荧光粉复合材料混合。不同激发波长的磁性荧光双功能复合物4受LED芯片2发出的 光线激发后，将产生不同波长的光线，经混合产生白光出射；磁性荧光双功能复合物4的种类及其与封装胶3的配比可根据灯具对光谱能量分布的要求进行调整，实现对色温、显色指数等光学参数的有效控制。A powdery filler such as glass beads or the like may be added to the encapsulant to obtain a colloid having an improved refractive index, which is then mixed with the magnetic phosphor composite. The magnetic fluorescent bifunctional composite 4 of different excitation wavelengths is emitted by the LED chip 2 After the light is excited, different wavelengths of light will be generated, and the white light will be emitted by mixing; the type of the magnetic fluorescent bifunctional composite 4 and its ratio with the encapsulant 3 can be adjusted according to the requirements of the luminaire for the spectral energy distribution to achieve the color temperature. Effective control of optical parameters such as color rendering index.
实施例3：如图4所示，利用外磁场的作用，将不同的磁性荧光双功能复合物吸附到封装胶层的不同位置上，实现荧光粉的分层排布：黄色荧光粉位于底层，绿色荧光粉位于中间层，红色荧光粉位于顶层或其他排列方式。待荧光粉颗粒位置固定后，同步进行热固化，实现荧光粉层的涂覆。利用外磁场的作用，可将底层荧光粉的位置固定在封装胶层中部，封装胶下部无荧光粉分布，实现荧光粉层与芯片的隔离，有效避免芯片温度导致荧光粉性能衰减。同时，采用该种方法制备的荧光粉层，可直接将底部的封装胶作为芯片的保护胶，省去传统涂覆工艺中保护胶注入的环节，更由于保护胶与荧光粉层同步喷涂、固化，避免了后期脱落的问题。最后，如图5所示，安装外围光学部件7，完成LED芯片的封装。Embodiment 3: As shown in FIG. 4, different magnetic fluorescent bifunctional composites are adsorbed to different positions of the encapsulant layer by using an external magnetic field to realize hierarchical arrangement of phosphors: the yellow phosphor is located on the bottom layer. The green phosphor is in the middle layer and the red phosphor is on the top or other arrangement. After the phosphor particles are fixed in position, thermal curing is simultaneously performed to achieve coating of the phosphor layer. By the action of the external magnetic field, the position of the underlying phosphor can be fixed in the middle of the encapsulant layer, and there is no phosphor distribution in the lower part of the encapsulant to realize the isolation of the phosphor layer from the chip, thereby effectively avoiding the degradation of the phosphor performance caused by the chip temperature. At the same time, the phosphor layer prepared by the method can directly use the bottom encapsulant as the protective glue of the chip, eliminating the injection of the protective glue in the traditional coating process, and simultaneously spraying and curing the protective glue and the phosphor layer. To avoid the problem of late fall off. Finally, as shown in FIG. 5, the peripheral optical component 7 is mounted to complete the packaging of the LED chip.
实施例4：如图6所示，改变磁铁的形状，能够使荧光粉层的排布形状也随之发生改变，磁铁的形状不限于图中所示的平面状、曲面状，也可为其他的马蹄状、圆锥状等，其个数也不限于单个，可为一组磁铁，以实现磁性荧光颗粒的周期性排列分布。Embodiment 4: As shown in FIG. 6, the shape of the magnet can be changed, and the arrangement shape of the phosphor layer can be changed accordingly. The shape of the magnet is not limited to the planar shape or the curved shape as shown in the drawing, and may be other. The horseshoe shape, the conical shape, and the like are not limited to a single one, and may be a group of magnets to realize periodic arrangement of magnetic fluorescent particles.
实施例5：如图7、图8所示，采用此种方法，适用集成封装多芯片LED。多颗芯片通过共晶焊接等方法固定在基板上，形成连通的电路。采用喷涂法直接将磁性荧光颗粒/封装胶复合材料涂覆在芯片表面，利用外磁场的作用，将不同的磁性荧光双功能复合物吸附到封装胶层的不同位置上，实现荧光粉的分层排布，待荧光粉颗粒位置固定后，同步进行热固化，完成荧光粉层的涂覆。最后安装外围光学部件7，完成多芯片LED的封装，如图9所示。Embodiment 5: As shown in FIG. 7 and FIG. 8, this method is applied to an integrated package multi-chip LED. A plurality of chips are fixed on the substrate by eutectic soldering or the like to form a connected circuit. The magnetic fluorescent particles/encapsulated rubber composite material is directly coated on the surface of the chip by spraying method, and different magnetic fluorescent bifunctional composites are adsorbed to different positions of the encapsulant layer by the action of an external magnetic field to realize stratification of the phosphor powder. After the phosphor particles are fixed in position, the heat curing is simultaneously performed to complete the coating of the phosphor layer. Finally, the peripheral optical component 7 is mounted to complete the packaging of the multi-chip LED, as shown in FIG.
当然，以上图示仅为本发明较佳实施方式，并非以此限定本发明的使用范围，故，凡是在本发明原理上做等效改变均应包含在本发明的保护范围内。 The above description is only intended to be a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all equivalent changes in the principles of the present invention are included in the scope of the present invention.

Claims (10)

  1. 一种磁性荧光粉复合材料的平面涂覆方法，其特征在于包括如下步骤：A planar coating method for a magnetic phosphor composite material, comprising the steps of:
    ①制备磁性荧光粉复合材料，并将其按一定比例与封装胶混合均匀；1 preparing a magnetic phosphor composite material and mixing it with the encapsulant at a certain ratio;
    ②将倒装LED芯片固定在封装基板上，形成连通的电路；2 fixing the flip-chip LED chip on the package substrate to form a connected circuit;
    ③将步骤①所得的磁性荧光粉胶混合物涂覆在芯片上；3 coating the magnetic phosphor paste mixture obtained in step 1 on the chip;
    ④利用外磁场的作用，将具有不同发光性质的荧光粉颗粒集中在硅胶的不同位置高度上，待其分布稳定后进行固化；4 using the action of the external magnetic field, the phosphor particles with different luminescent properties are concentrated at different heights of the silica gel, and the solidification is performed after the distribution is stable;
    ⑤安装外围光学部件。5 Install peripheral optical components.
  2. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤①所述的封装胶是环氧类胶体或硅胶类胶体，可直接与磁性荧光粉复合材料混合；或加入粉末状填充物得到折射率改善的胶体，再将之与磁性荧光粉复合材料混合；所述粉末填充物为熔凝石英、荧石、玻璃微珠中的一种或多种。The planar coating method according to claim 1, wherein the encapsulant in the step 1 is an epoxy colloid or a silica gel colloid, which can be directly mixed with the magnetic phosphor composite; or a powdery filler is added. The refractive index-improved colloid is further mixed with the magnetic phosphor composite; the powder filler is one or more of fused quartz, fluorite, and glass microbeads.
  3. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤②所述LED芯片为蓝光LED芯片、红光LED芯片、黄光LED芯片、绿光LED芯片、紫光LED芯片中的一种或多种；可为单个LED芯片，或一组LED芯片的组合。The planar coating method according to claim 1, wherein the LED chip of step 2 is one of a blue LED chip, a red LED chip, a yellow LED chip, a green LED chip, and a violet LED chip. A variety; can be a single LED chip, or a combination of a group of LED chips.
  4. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤②所述的基板，其材质可为铝、铜、合金、碳化硅、氮化铝、环氧树脂。The planar coating method according to claim 1, wherein the substrate of the step 2 is made of aluminum, copper, alloy, silicon carbide, aluminum nitride or epoxy resin.
  5. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤③所述的涂覆方式可为旋涂、喷涂、沉积、印刷。The planar coating method according to claim 1, wherein the coating method described in the step 3 is spin coating, spraying, depositing, and printing.
  6. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤④所述的外磁场为具有一定形状的磁铁，可为马蹄状、球状、圆环状、平面状中的一种或多种；可为单个磁铁，或一组磁铁的组合。The planar coating method according to claim 1, wherein the external magnetic field in the step 4 is a magnet having a certain shape, and may be one or more of a horseshoe shape, a spherical shape, an annular shape, and a planar shape. ; can be a single magnet, or a combination of a group of magnets.
  7. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤③所得的磁性荧光粉胶，在步骤④所得外磁场的作用下，将具有磁性大小不同的磁性荧光颗粒吸附到胶体中的不同位置，待其分布稳定后，同步进行热固化，实现不同发光性质的荧光粉分层排布。The method of claim 1 , wherein the magnetic phosphor obtained in step 3 adsorbs magnetic fluorescent particles having different magnetic properties into the colloid under the action of the external magnetic field obtained in step 4. Position, after the distribution is stable, the thermal curing is simultaneously performed to realize the layered arrangement of the phosphors with different luminescent properties.
  8. 根据权利要求1所述的平面涂覆方法，其特征在于：步骤⑥所述外围光学部件为外表面为自由曲面的透镜，用于控制光线和实现均匀照明的要求；其内表面可为矩形状、半球状或圆柱状；所述透镜的材质为聚碳酸酯、硅胶或玻璃中一种或多种。The planar coating method according to claim 1, wherein the peripheral optical component of the step 6 is a lens whose outer surface is a free-form surface, which is used for controlling light and achieving uniform illumination; and the inner surface thereof may be rectangular. , hemispherical or cylindrical; the lens is made of one or more of polycarbonate, silica gel or glass.
  9. 一种磁性荧光粉复合材料，其特征在于：A magnetic phosphor composite material characterized by:
    磁性荧光粉复合材料以四氧化三铁为磁性核，二氧化硅为耦合剂，掺杂稀土的无机荧光材料为外壳的磁性荧光双功能复合物；所述磁性核粒径为50～200nm；所述耦合剂具有良好的生 物相容性，能够减少四氧化三铁对荧光粉的淬灭作用，厚度为10～20nm；The magnetic phosphor composite material has a ferroferric oxide as a magnetic core, silica as a coupling agent, and a rare earth-doped inorganic fluorescent material as a magnetic fluorescent bifunctional composite; the magnetic core has a particle diameter of 50 to 200 nm; The coupling agent has a good life The compatibility of the material can reduce the quenching effect of the ferroferric oxide on the phosphor, and the thickness is 10-20 nm;
    所述荧光材料为红色荧光粉、绿色荧光粉、黄色荧光粉、蓝光荧光粉中的一种或多种，厚度为20～40nm；The fluorescent material is one or more of a red phosphor, a green phosphor, a yellow phosphor, and a blue phosphor, and has a thickness of 20 to 40 nm;
    所述的磁性荧光粉复合材料，不同发光性质的掺杂稀土的无机荧光材料应包覆不同粒径大小的磁性核，以得到具有不同磁性大小的磁性荧光双功能复合物；The magnetic phosphor composite material, the rare earth-doped inorganic fluorescent material with different luminescent properties should be coated with magnetic cores of different particle sizes to obtain magnetic fluorescent bifunctional composites having different magnetic sizes;
    所述不同粒径大小的磁性核通过在四氧化三铁的制备过程中加入表面改性剂获得；所述表面改性剂为盐酸、过氧化氢、氯化铁或油酸；The magnetic cores of different particle sizes are obtained by adding a surface modifier during the preparation of the ferroferric oxide; the surface modifier is hydrochloric acid, hydrogen peroxide, ferric chloride or oleic acid;
    所述不同磁性大小的磁性荧光双功能复合物还可以通过耦合剂包覆一个或两个或三个或不同数目的磁性核得到。The magnetically fluorescent bifunctional complexes of different magnetic sizes may also be obtained by coating one or two or three or different numbers of magnetic nuclei with a coupling agent.
  10. 根据权利要求9所述的一种磁性荧光粉复合材料，其特征在于：所述红色荧光粉为以硫化物体系、氮化物体系或钨/钼酸盐体系为主体的荧光材料；所述绿色荧光粉为以硫代镓酸盐体系、氮氧化物体系或硅酸盐体系为主体的荧光材料；所述蓝色荧光粉为以YAG、TAG、氮氧化物体系、卤磷酸盐体系或硅酸盐体系为主体的荧光材料；The magnetic phosphor composite material according to claim 9, wherein the red phosphor is a fluorescent material mainly composed of a sulfide system, a nitride system or a tungsten/molybdate system; the green fluorescent material The powder is a fluorescent material mainly composed of a thiogallate system, an oxynitride system or a silicate system; the blue phosphor is YAG, TAG, a nitrogen oxide system, a halophosphate system or a silicate The system is a fluorescent material of the main body;
    所述磁性荧光双功能复合物可通过溶胶-凝胶法、微乳热法、共沉淀法或溶剂热法方式制备。 The magnetic fluorescent bifunctional complex can be prepared by a sol-gel method, a microemulsion method, a coprecipitation method or a solvothermal method.
PCT/CN2017/114918 2017-11-14 2017-12-07 Magnetic fluorescent powder composite and plane coating method therefor WO2019095463A1 (en)

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