TW201837161A - Fluorescent substance, fabrication method thereof and light-emitting module and solar panel using such - Google Patents

Abstract

Embodiments disclose a fluorescent substance, its fabrication method and a light-emitting module and solar panel using the fluorescent substance. The fluorescent substance is excited by ultraviolet light to emit full-spectrum white light having a wavelength ranging from 344 nm to 689 nm. The fluorescent light at 50% emission intensity has a wavelength ranging from 427nm to 564nm. The fluorescent light at 90% emission intensity has a wavelength ranging from 459nm to 513nm. The fluorescent light at highest emission intensity has a wavelength ranging from 480nm to 510nm. The color diagram of the white light includes an X-coordinate of 0.34 to 0.37 and a Y-coordinate of 0.34 to 0.37. The disclosure uses UV light to excite the fluorescent substance to emit white light instead of mixing RGB-colored fluorescent substances.

Description

Fluorescent powder, method for producing the same, and light-emitting module and solar panel using the same

The invention relates to a fluorescent powder, a method for manufacturing the same, and a light emitting module and a solar panel using the same, in particular to ultraviolet light to excite a single fluorescent powder to emit white light without The invention of mixing RGB three-color phosphor powder is required.

The white light source is suitable for night illumination because it is close to sunlight. Common white light sources such as fluorescent lamps and white LEDs.

Among them, the principle of illumination of fluorescent lamps can be found in Wikipedia https://zh.wikipedia.org/wiki/%E8%9E%A2%E5%85%89%E7%87%88, which describes the fluorescent lamp as a kind of arc lamp. . It uses electricity to excite mercury vapor in argon or helium to form a plasma and emit short-wave ultraviolet light. When the ultraviolet light is absorbed by the fluorescent powder, it emits visible light to illuminate, so that the way of emitting visible light belongs to fluorescence.

In addition, the white LED can be found in Wu Xinmou, Lin Yingzhi, Hong Haoen and others in the first issue of the new quarterly magazine, Volume 42, "White LED and Fluorescent Powder Development Application Trends". The article points out that the principle of white LED implementation can be divided into two types, one is the contrast color mixture, such as blue LED with yellow fluorescent powder, but the white light produced by this method has poor color rendering, and the second is red and green. The blue (RGB) three colors are mixed, and the actual implementation method can be divided into multiple wafer type LEDs, that is, the red, green and blue LED chips are integrated on one lamp, and the method can be controlled and displayed. The chromaticity is the best, but the circuit design is complicated and the production cost is high. The other method is single-chip LED. The principle of white LED illumination is mainly short-wavelength LED chips, such as blue light (450-480 nm) or UV. (380 ~ 420 nm) LED chip, which emits fluorescent powder with a long wavelength of light. The light from the LED is mixed with the light of the phosphor powder to form white light. Therefore, this type of LED is also called a Phosphor converted LED. PC-LED).

However, ultraviolet light is used as the light source for exciting the fluorescent powder, and it is necessary to match the RGB three-color fluorescent powder to emit white light.

Accordingly, the present invention intends to develop a phosphor powder which emits white light after being excited by an ultraviolet light having a wavelength between 200 nm and 400 nm without mixing phosphor powder of different colors. . The phosphor powder emits white light in the following wavelength range under the excitation of the ultraviolet light, wherein the light emission range is between 344 nm and 689 nm; the 50% emission intensity ranges from 427 nm to 564 Nai. Between meters; 90% of the light intensity range is between 459 nm and 513 nm; the strongest intensity is between 480 nm and 510 nm. Preferably, the ultraviolet light has a wavelength of 280 nm. Wherein, the chromaticity coordinates of the white light are between X4 and 0.37, and the Y coordinate is between 0.34 and 0.37.

Further, the phosphor powder is composed of a transition element doped double-layer perovskite, and the chemical formula is: or Wherein, 0≦y≦1, 0≦x≦0.1, A is any one of Ba, Sr, Ca, and Mg, B is any one of Ba, Sr, Ca, and Mg, and C is any one of Eu, Sm, and Nd.

Further, the chemical formula of the phosphor powder is: .

Further, the chemical formula of the phosphor powder is: . Preferably, the value of the parameter x is zero.

The invention further provides a method for manufacturing the foregoing phosphor powder, comprising:

I. Compounds of A, B, and C with ZnO, Forming a phosphor powder precursor according to a molar ratio reaction of each element of the phosphor powder; II. calcining the phosphor powder precursor at a temperature between 800 ° C and 1200 ° C to obtain the Fluorescent powder.

Further, the mixed reaction method of the step I is a chemical synthesis method or a physical synthesis method. Further, the chemical synthesis method includes a sol-gel method or a co-precipitation method; and the physical synthesis method is a solid-state reaction method.

Further, in step I, the compound A is one of the following: , CaO, , BaO, , SrO, Or MgO; B compound is one of the following: , CaO, , BaO, , SrO, Or MgO; C compound is one of the following: , or .

Further, in the step I, the phosphor powder precursor is ground and pulverized; in the step II, after the calcination is completed, the phosphor powder may be further ground and pulverized.

The invention further provides a light-emitting module using the phosphor powder of the invention, comprising:

An ultraviolet light emitting device; a light cover covering the ultraviolet light emitting member, wherein the fluorescent powder is contained on the light cover.

Further, the phosphor powder is doped in the lamp cover.

Further, the phosphor powder is coated on the lamp cover.

Further, the light emitting module is an LED light emitting member.

Further, the light emitting module is a fluorescent light emitting member.

The invention further provides a solar panel using the phosphor powder of the invention, the solar panel has a panel layer and a layer of a wafer, the phosphor powder is coated on the surface of the panel layer, the inner layer of the panel layer, and the crucible One or a combination of the wafer layer surface or the back side of the wafer layer.

According to the above technical features, the following effects can be achieved:

1. The present invention can use ultraviolet light to excite a single type of phosphor powder to emit white light without mixing RGB three-color phosphor powder.

2. The phosphor of the present invention is excited by ultraviolet light to emit white light of a full spectrum.

In view of the above technical features, the main effects of the phosphor powder of the present invention, the method for producing the phosphor powder, and the light-emitting module and the solar panel using the same will be clearly shown in the following embodiments.

The phosphor of the present embodiment emits white light in the following wavelength range under excitation of an ultraviolet light having a wavelength between 200 nm and 400 nm, wherein the light emission range is from 344 nm to 689 nm. 50% of the range of light intensity ranged from 427 nm to 564 nm; 90% of the range of light intensity ranged from 459 nm to 513 nm; the strongest beam intensity ranged from 480 nm to 510 Between the rice.

The phosphor powder of this embodiment is composed of a transition element doped double-layer perovskite, and its chemical formula is: or Wherein, 0≦y≦1, 0≦x≦0.1, A is any one of Ba, Sr, Ca, and Mg, B is any one of Ba, Sr, Ca, and Mg, and C is any one of Eu, Sm, and Nd. Preferably, the chemical formula of the phosphor powder is: or .

The method for producing the phosphor powder is a compound of A, B, and C and ZnO, According to the molar ratio mixing reaction of each element of the phosphor powder, the reaction method is a chemical synthesis method or a physical synthesis method, such as a sol-gel method or a co-precipitation method, and the physical synthesis method such as solid state reaction method Thereby, forming a phosphor powder precursor; and calcining at a temperature between 800 ° C and 1200 ° C to obtain the phosphor powder.

Among them, the A compound is one of the following: , CaO, , BaO, , SrO, Or MgO; B compound is one of the following: , CaO, , BaO, , SrO, Or MgO; C compound is one of the following: , or .

Take For example, The manufacturing method of the phosphor powder includes:

I. Will (CaO), ZnO, as well as According to the molar ratio reaction of each element of the phosphor powder, a phosphor powder precursor is formed, and the phosphor powder precursor is placed in a ball mill tank, and ethanol and agate beads are added at a concentration of 99.99%, and placed. To the ball mill shaker, the agate beads are used to oscillate back and forth, and the phosphor powder precursor is pulverized by friction and shear force to achieve preliminary mixing. The phosphor powder precursor dissolved in the ethanol is placed in an oven, waiting for the ethanol solvent to evaporate, and the phosphor powder precursor is dried, and then ground using a dry ball mill.

II. The phosphor powder precursor is placed in a crucible, and calcined at 800 ° C, 900 ° C, 1000 ° C, 1100 ° C and 1200 ° C, respectively, when the calcination temperature is lower than 1000 ° C, added per minute The temperature is raised to a desired temperature at a temperature of 10 ° C. When the calcination temperature is higher than 1000 ° C, the temperature is raised to 1000 ° C by heating at 10 ° C per minute, and then the temperature is raised to a desired temperature by heating at 5 ° C per minute, and then the temperature is maintained for 180 minutes. Then, the temperature is lowered to 10 ° C per minute to cool down to room temperature. After the calcination is completed, the phosphor powder is taken out, and the powder may be agglomerated after being subjected to high temperature treatment, which may cause difficulty in subsequent encapsulation on the light-emitting member, and When the PL fluorescence absorption characteristic is measured, when the phosphor powder absorbs the excitation light, a part of the excitation light source is scattered on the surface, causing distortion of the fluorescence efficiency measurement, and therefore dry ball milling is performed.

in In the phosphor powder, the measurement is performed with x being 0 (ie ):

Referring to the first A to the first G, the fluorescence spectrometer (Photoluminescence, PL) analysis, respectively, the wavelength of ultraviolet light is 250 nm, 253 nm, 260 nm, 280 nm, 300 nm, 320 nm, 365 nm, excited The white light spectral range obtained by the phosphor.

Referring to the second figure, taking the phosphor powder calcined at a calcination temperature of 1100 ° C as an example, the phosphor powder is scanned at a full wavelength band, and the optimum excitation wavelength is 280 nm. The peak intensity of the radiant radiant is at 492 nm, while the width of the radiant radiant peak ranges from 344 nm to 689 nm. It does not change the peak of the radiatable emission as the wavelength of the excitation is changed. width.

Referring to the third figure, it can be found that the calcination temperature does not affect the wavelength of the peak intensity of the radiation emission peak of 492 nm, but it affects its light-emitting intensity, and the higher the calcination temperature, the higher the intensity of the excitation light.

Referring to the fourth part, the color of the illuminating part is proposed by the International Lighting Commission (Commission Internationale de L'Eclairage: CIE) in 1931, and the chromaticity coordinate map is proposed to easily observe the chromaticity of the actual illuminating. Experimental results Fluorescent powders at 800 ° C, 900 ° C, 1000 ° C, 1100 ° C, 1200 ° C, its chromaticity coordinates are (0.34, 0.34), (0.35, 0.37), (0.35, 0.36), (0.35, 0.36), (0.35, 0.35), which belongs to the white light range. Therefore, the experimental results confirmed that this type of fluorescent material can produce very strong white light. The chromaticity coordinates of the white light are between 0.34 and 0.37, and the Y coordinate is between 0.34 and 0.37.

Referring to FIG. 5, a light-emitting module using the foregoing phosphor powder, the light-emitting module is an LED light-emitting component, comprising:

An ultraviolet light emitting member (1); a lamp cover (2) covering the ultraviolet light emitting member (1), the fluorescent powder (3) being doped in the lamp cover (2). The ultraviolet light is emitted by the ultraviolet light emitting member (1) to excite the fluorescent powder (3) to emit white light.

Referring to the sixth figure, in order to use the above-mentioned fluorescent powder light-emitting module, the light-emitting module is a fluorescent light-emitting component, comprising:

An ultraviolet light emitting member (1A) is an electric power that excites mercury vapor in argon or helium gas to form a plasma and emits ultraviolet light; a lamp cover (2A), which is a lamp tube for filling argon or helium gas and mercury Vapor, the phosphor powder (3) is coated on the lamp cover (2A). The ultraviolet light is also emitted from the ultraviolet light emitting member (1A) to excite the fluorescent powder (3) to emit white light.

The light-emitting module can also be a power-saving light bulb, and since the principle of the light-saving bulb is the same as that of the fluorescent tube, the structure thereof will not be described in detail herein.

Referring to FIG. 7A, a solar panel (4) using the foregoing phosphor powder, the solar panel (4) has a panel layer (41) and a wafer layer (42), the phosphor powder (3) Applying on the surface of the panel layer (41), since the solar panel (4) can only absorb the wavelength of visible light, when the sunlight is irradiated on the solar panel (4), the phosphor (3) can The ultraviolet light in the light is converted into white light and utilized by the solar panel (4), so that the power generation efficiency of the solar panel (4) can be increased.

Referring to FIG. 7B, the phosphor powder (3) may be coated on the inner layer of the panel layer (41) in addition to the surface of the panel layer (41), and the solar panel may be improved. (4) Power generation efficiency.

Referring to the seventh C diagram, the phosphor powder (3) can also be coated on the surface of the germanium wafer layer (42), which can also improve the power generation efficiency of the solar panel (4).

Referring to FIG. 7D, the phosphor powder (3) can also be coated on the back surface of the germanium wafer layer (42), which can also improve the power generation efficiency of the solar panel (4).

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

 (1) (1A) ‧ ‧ ultraviolet light illuminating parts

(2) (2A) ‧‧‧shade

(3) ‧‧‧Fluorescent powder

(4) ‧‧‧ solar panels

(41) ‧‧‧ panel layer

(42)‧‧‧矽 Wafer layer

[Fig. 1A] is a white light spectral range of the full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 250 nm.

[Fig. B] is a white light spectral range of the full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 253 nm.

[Fig. 1C] is a white light spectral range of the full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 260 nm.

[First D] is a white light spectral range of full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 280 nm.

[Fig. E E] is a white light spectral range of the full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 300 nm.

[Front F] is the white light spectral range of the full-band scanning after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 320 nm.

[First G map] is a white light spectral range of the full-band scan after the phosphor powder of the present invention is excited by ultraviolet light having a wavelength of 365 nm.

[Second image] is a graph of the fluorescence wavelength and the fluorescence intensity of the full-band scan of the phosphor powder of the present invention at a calcination temperature of 1100 ° C.

[Third image] is a graph showing the fluorescence wavelength and the fluorescence intensity at different calcination temperatures of the phosphor powder of the present invention at a wavelength of 280 nm.

[Fourth figure] is the phosphor powder of the present invention when the parameter x is 0, Chromaticity coordinate map.

[Fifth figure] is a schematic view showing that the light-emitting module of the present invention is an LED light-emitting member.

[Sixth Diagram] is a schematic diagram of the illumination module of the present invention being a fluorescent lamp illumination member.

[Seventh A] is a schematic view in which the phosphor powder of the present invention is used for a solar panel, and the phosphor powder is coated on the surface of the panel layer.

[Fig. 7B] is a schematic view showing that the phosphor powder of the present invention is used for a solar panel, and the phosphor powder is applied to the inner layer of the panel layer.

[Seventh C] is a schematic view in which the phosphor powder of the present invention is used for a solar panel, and the phosphor powder is coated on the surface of the tantalum wafer layer.

[Seventh D] is a schematic view in which the phosphor powder of the present invention is used for a solar panel, and the phosphor powder is coated on the back surface of the tantalum wafer layer.

Claims (20)

A fluorescent powder which emits white light in the following wavelength range under excitation of ultraviolet light, wherein the light-emitting range is between 344 nm and 689 nm, and the strongest light-emitting intensity is between 480 nm. Between 510 nm. The phosphor powder according to claim 1, wherein the 50% emission intensity ranges from 427 nm to 564 nm; and the 90% emission intensity ranges from 459 nm to 513 nm. between. The phosphor powder according to claim 1, wherein the white light has a chromaticity coordinate of an X coordinate of between 0.34 and 0.37 and a Y coordinate of between 0.34 and 0.37. The fluorescent powder according to claim 1, wherein the ultraviolet light has a wavelength of 280 nm. A fluorescent powder consisting of a transition element doped with a double-layered perovskite, the chemical formula of which is: or Wherein, 0≦y≦1, 0≦x≦0.1, A is any one of Ba, Sr, Ca, and Mg, B is any one of Ba, Sr, Ca, and Mg, and C is any one of Eu, Sm, and Nd. For example, the phosphor powder described in claim 5, further, the chemical formula of the phosphor powder is: . For example, the phosphor powder described in claim 5, further, the chemical formula of the phosphor powder is: . The fluorescent powder according to claim 5, wherein the parameter x has a value of zero. A method for producing a phosphor powder according to claim 5, comprising: I. a compound of A, B, and C and ZnO, Forming a phosphor powder precursor according to a molar ratio reaction of each element of the phosphor powder; II. calcining the phosphor powder precursor at a temperature between 800 ° C and 1200 ° C to obtain the Fluorescent powder. The method for producing a phosphor powder according to claim 9, wherein the mixing reaction method of the step I is a chemical synthesis method or a physical synthesis method. The method for producing a phosphor according to claim 10, wherein the chemical synthesis method comprises a sol-gel method or a co-precipitation method; and the physical synthesis method is a solid-state reaction method. The method for producing a phosphor according to claim 9, wherein in the step I, the compound A is one of the following: , CaO, , BaO, , SrO, Or MgO; B compound is one of the following: , CaO, , BaO, , SrO, Or MgO; C compound is one of the following: , or . The method for producing a phosphor according to claim 9, further, in the step I, grinding and pulverizing the phosphor powder precursor; in the step II, after the calcination is completed, the phosphor powder is Grinding and pulverizing again. A illuminating module using the luminescent powder according to claim 1, comprising: an ultraviolet illuminating member; a lamp cover covering the ultraviolet illuminating member, wherein the luminescent powder is contained on the reticle . The illuminating module of claim 14, wherein the phosphor powder is doped in the lampshade. The light-emitting module of claim 14, wherein the phosphor powder is coated on the lamp cover. The illuminating module of claim 14, wherein the illuminating module is an LED illuminating member. The lighting module of claim 14, wherein the lighting module is a fluorescent lamp. The light-emitting module of claim 14, wherein the light-emitting module is a power-saving light bulb. A solar panel using the phosphor powder according to claim 1, wherein the solar panel has a panel layer and a buffer layer, and the phosphor powder is coated on the surface of the panel layer and the inner layer of the panel layer One or a combination of the surface of the wafer layer or the back surface of the wafer layer.