Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of light conversion fluorescent powder and preparation method thereof

A fluorescent powder and light conversion technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high cost, narrow excitation band of light conversion fluorescent powder, low near-infrared emission intensity, etc., achieve low production cost, improve optoelectronic Conversion efficiency, low price effect

Active Publication Date: 2021-05-18
陕西格物旭光科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a light-converting phosphor and a preparation method thereof, which are used to solve the problem of narrow excitation band, low near-infrared emission intensity and high cost of the light-converting phosphor in the prior art. The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of light conversion fluorescent powder and preparation method thereof
  • A kind of light conversion fluorescent powder and preparation method thereof
  • A kind of light conversion fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The preparation method of light-conversion fluorescent powder of the present invention comprises the following steps:

[0046] Execute step S10, according to the general chemical formula M 3-y Ga 2-x GeO 8 :xCr 3+ , yRE 3+ The molar stoichiometric ratio in is to weigh the raw materials of each component respectively.

[0047] S20. Fully grind and mix the raw materials of the components weighed in step S10 evenly.

[0048] In a specific embodiment, the raw materials of the various components weighed are added to an agate mortar and ground for 30 minutes to make them mixed uniformly. It should be noted that as long as the above-mentioned method can be achieved, all suitable for the present invention.

[0049] S30, performing high-temperature sintering in an air atmosphere on the raw materials that have been thoroughly ground and mixed in step S20, and then cooled to room temperature.

[0050] In one embodiment, the fully ground and mixed raw materials are placed in...

Embodiment 1

[0058] Light Conversion Phosphor Zn 3 Ga 2 GeO 8 :0.3Cr 3+ , 0.01Yb 3+ Preparation: Weigh ZnO (analytical pure) 0.2458g, Yb 2 o 3 (Analytical pure) 0.002g, Cr 2 o 3 (Analytical pure) 0.023g, Ga 2 o 3 (Analytical pure) 0.1593g, GeO 2 (Analytical pure) 0.1046g. Mix the above raw materials evenly and put them into a mortar, add absolute ethanol for thorough grinding, put them into a corundum crucible, and then carry out high-temperature solid-phase synthesis in an air atmosphere. In this embodiment, the calcination temperature is set to 1400° C., and the calcination time is 6 hours. After the resistance furnace is cooled to room temperature, the sample is taken out and fully ground to obtain a light conversion phosphor sample.

Embodiment 2

[0060] Light Conversion Phosphor Zn 3 Ga 2 GeO 8 :0.25Cr 3+ , 0.01Yb 3+ Preparation: Weigh ZnO (analytical pure) 0.2458g, Yb 2 o 3 (Analytical pure) 0.002g, Cr 2 o 3 (Analytical pure) 0.0192g, Ga 2 o 3 (Analytical pure) 0.1640g, GeO 2 (Analytical pure) 0.1046g. Mix the above raw materials evenly and put them into a mortar, add absolute ethanol for thorough grinding, put them into a corundum crucible, and then carry out high-temperature solid-phase synthesis in an air atmosphere. In this embodiment, the calcination temperature is set to 1380° C., and the calcination time is 8 hours. After the resistance furnace is cooled to room temperature, the sample is taken out and fully ground to obtain a light conversion phosphor sample.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a light conversion fluorescent powder and a preparation method thereof. The light-converting phosphor is prepared by a high-temperature solid-state sintering method, and its general chemical formula is as follows: M 3‑y Ga 2‑x GeO 8 :xCr 3+ , yRE 3+ , wherein M is selected from one or more combinations of Zn, Ba, Ca and Sr, RE is selected from one or more combinations of Yb, Nd and Ho, and the value range of x is 0 ~0.50, preferably 0.15~0.30, the value range of y is 0.001~0.05, preferably 0.005~0.02. The light-converting fluorescent powder of the present invention is doped with Cr in its matrix 3+ and near-infrared emitting rare earth ions RE 3+ (Yb 3+ ,Nd 3+ , Ho 3+ and its combination), using Cr 3+ As a sensitizer, it can efficiently absorb ultraviolet-visible light with a broad spectrum range of 250-650nm and transfer the energy to the activator RE 3+ , to excite high-intensity near-infrared light, due to the Cr 3+ For non-rare earth elements, rare earth ions RE 3+ The doping amount is low, which reduces the production cost to a certain extent; and matches well with the spectral response of silicon-based solar cells, and can be used for spectral conversion phosphors for silicon-based solar cells.

Description

technical field [0001] The invention relates to the field of spectrum conversion luminescence, in particular to a light conversion fluorescent powder and a preparation method thereof. Background technique [0002] Sunlight contains light of various wavelengths, and current single-junction solar cells can only utilize a part of them. Taking silicon-based solar cells as the most widely used in current technology as an example, the Eg (band gap) of silicon semiconductors is 1.12eV. The infrared light of 1100nm will pass through the battery, so it cannot be used; and for the photons with higher energy in the short-wave range, electrons and holes (carriers) will be excited to a higher energy state, and they will pass through the P-N junction. Excess energy is lost due to heat exchange with the crystal lattice prior to the formation of current. In addition, silicon solar cells have different light responses to different wavelengths, especially the light response to the ultraviol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/68
CPCC09K11/7708
Inventor 赵磊范飞月蔡忆雨商一凡李艳艳
Owner 陕西格物旭光科技有限公司