Photon conversion material and preparation method thereof

A technology for photon conversion and raw materials, applied in the field of photon conversion materials and their preparation, can solve the problems of insufficient brightness and high price, and achieve the effects of low price, low synthesis temperature, and overcoming inconsistent response coefficients

Active Publication Date: 2014-12-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

LEDs have been successfully used in LCD backlight, outdoor and large-screen displays for securities trading, automobiles, landscape decoration, street lighting, signal warnings, etc. However, in terms of household lighting, white LEDs still need to overcome heat dissipation, insufficient brightness and price at this stage. Problems such as high

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  • Photon conversion material and preparation method thereof
  • Photon conversion material and preparation method thereof
  • Photon conversion material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: YBO 3 : Bi 3+ 0.01 , Gd 3+ r

[0053] According to the chemical formula (Y 0.99 Bi 0.01 )BO 3 and (Y 0.65 Gd 0.35 ) 0.99 Bi 0.01 BO 3 The atomic weight ratio shown is respectively weighed Y 2 o 3 、Gd 2 o 3 , Bi(NO 3 ) 3 ·5H 2 O and H 3 BO 3 , where H 3 BO 3 Excessive 5%; pour each raw material into an agate mortar, drop in about 3% alcohol accounting for the total mass of raw materials, use agate grinding rod to grind the sample fully; then put it into a corundum crucible, use the grinding rod to compress the sample, add corundum Material crucible cover, put the sample into the furnace, heat up to 800°C at 50°C / min, keep warm for 2 hours and then cool to room temperature with the furnace; take out the sample, grind the sample again, put it into a corundum crucible, press it tightly, and cover it Then put it into the furnace, raise the temperature at 50°C / min to 1150°C, keep it warm for 4 hours, then cool it down to 600°C at 5°C / min, and...

Embodiment 2

[0055] Example 2: YBO 3 : Bi 3+ x , Gd 3+ 0.35

[0056] According to the same method of embodiment 1 synthetic photon conversion material (Y 0.65 Gd 0.35 ) 1-x Bi x BO 3 (x=0, 0.0001 and 0.0003), and the luminescence properties of the samples were characterized at the Hefei Light Source Vacuum Ultraviolet Spectrum Experimental Station of the National Synchrotron Radiation Laboratory.

[0057] Monitor the emission at 313nm, and measure the excitation spectrum of the sample as figure 2 shown. From figure 2 Visible: when there is no Bi 3+ When doped, the excitation spectrum of the sample mainly has a borate matrix absorption band (HB) with a peak wavelength of 169nm and a borate matrix absorption band (HB) with a peak wavelength of 274nm. 8+ S 7 / 2 → 6 I J (Gd 3+ ) electronic transition composition; when the sample is mixed with Bi 3+ After that, two new absorption bands appear, and the intensity of the absorption bands varies with Bi in the range of 0-0.0003 ...

Embodiment 3

[0059] Example 3: YBO 3 : Bi 3+ x , Gd 3+ r , Tb 3+ 0.04

[0060] to Y 2 o 3 、Gd 2 o 3 , Tb 4 o 7 , Bi(NO 3 ) 3 ·5H 2 O and H 3 BO 3 Be raw material, synthesize sample according to the same method of embodiment 1 (Y 1-r Gd r ) 1-x Bi x Tb 0.04 BO 3 (r=0, 0.2, 0.35, 0.5; x=0, 0.01), and the luminescence properties of the samples were characterized at the Hefei Light Source Vacuum Ultraviolet Spectroscopy Experimental Station of the National Synchrotron Radiation Laboratory.

[0061] Sample (Y 1-r Gd r ) 1-x Bi x Tb 0.04 BO 3 The emission spectrum under excitation at 172nm is as Figure 4 As shown, the emission peaks in the figure correspond to Tb at 622nm, 582nm, 543nm and 488nm respectively 3+ of 5 D. 4 - 7 f J (J=3,4,5,6) Electronic transitions. Monitor Tb 3+ With the strongest emission at 543nm, the excitation spectrum of the sample is measured as Figure 5 shown. From Figure 5 It can be seen that the excitation spectrum not only conta...

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Abstract

The invention discloses a photon conversion material and a preparation method thereof. The composition general formula of the photon conversion material is (Ln1-x-ySxRy) BO3, wherein Ln is one or more of Y<3+>, La<3+>, Sc<3+>, Lu<3+>, Al<3+>, Gd<3+> and In<3+>; S is one or more of Sb<3+>, Bi<3+>, Sn<2+> and Pb<2+>; R is one or more of Eu<3+>, Tb<3+>, Ce<3+>, Pr<3+> and Sm<3+>; and in the general formula, x and y respectively express mole percentages of the S and the R accounting for Ln in a LnBO3 lattice dot matrix, x is more than or equal to 0 and less than or equal to 1.0, y is more than or equal to 0 and less than or equal to 1.0, and the x and the y are not 0 at the same time. The photon conversion material can be used for converting photons from short or medium ultraviolet wavelength to medium or long ultraviolet wavelength or visible light wavelength and converting high-energy photons to linear spectrums or broadband spectrums or regulating the high-energy photons to near white light according to the application requirement of a detector or a short or medium ultraviolet light emitting diode (LED).

Description

1. Technical field [0001] The invention relates to a fluorescent material and a preparation method thereof, in particular to a photon conversion material and a preparation method thereof. 2. Background technology [0002] Space exploration has always been in the ascendant, especially in order to seize the supremacy of the air, countries around the world continue to develop space exploration in a deeper direction. Xe Gas Proportional Scintillation Counter (GPSC) is widely used due to its outstanding advantages such as large-area uniform detection, ability to work at room temperature, high energy resolution (at least twice as high as that of gas proportional counters), good energy linearity, and high counting capacity. It is widely used in astrophysics, high-energy physics and nuclear radiation high-energy particle detection. In addition, X-ray detection is also widely used in X-ray spectrometer, X-ray fluorescence analysis and medical treatment. The Xe gas proportional scint...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 陈雷罗安琪张耀蒋阳李俊巍李国鹏
Owner HEFEI UNIV OF TECH
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