Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material

A technology of luminescent materials and quantum tailoring, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low utilization rate of solar spectrum, low conversion efficiency of sunlight, and low energy transfer efficiency, so as to improve photoelectric conversion efficiency, The effect of widening the absorption cross section and enhancing the utilization rate

Active Publication Date: 2018-06-22
HENAN UNIV OF SCI & TECH
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Problems solved by technology

However, there are still great shortcomings in the above work: (1) Most of the quantum tailoring mechanism of rare earth ions belongs to cooperative energy transfer, resulting in low energy transfer efficiency and easy concentration quenching, so the conversion efficiency of sunlight is low
(2) Some rare earth ion pairs can perform two-step energy transfer (Nd 3+ -Yb 3+ 、Er 3+ -Yb 3+ 、Pr 3+ -Yb 3+ ), thus effectively improving the energy conversion efficiency, but these ions have a narrow absorption cross-section due to the 4f®4f transition, and the actual utilization of the solar spectrum is low

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  • Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material
  • Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material
  • Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material

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preparation example Construction

[0024] The preparation method of the high-efficiency broad-spectrum quantum tailoring luminescent material of the Bi-Nd-Yb co-doped YAG comprises the following steps:

[0025] Step 1, weigh Y according to the molar percentage distribution ratio in the general formula 2 o 3 (A.R.), Al 2 o 3 (A.R.), Bi 2 o 3 (99.9%), Nd 2 o 3 (99.9%), Yb 2 o 3(99.9%), after that, put the weighed drug in an agate mortar and grind it for 1 to 3 hours to mix it evenly, and then put it in a corundum crucible to be sintered;

[0026] Step 2. Put the corundum crucible containing the sample into the tube furnace, evacuate for 1 to 3 times to reduce the pressure in the furnace chamber to below 0.01MPa, and inject argon gas until it is stable, so that the medicine is in the argon gas environment;

[0027] Step 3: Turn on the tube furnace and evenly raise the temperature to 100°C at a rate of 1°C to 5°C per minute and keep it warm for half an hour to remove the remaining moisture in the sample, t...

Embodiment 1

[0035] A kind of Bi-Nd-Yb co-doped YAG powder luminescent material, its composition general formula is Y 3 al 5 o 12 : 0.5mol% Bi 3+ , 0.5mol%Nd 3+ , 5.0mol% Yb 3+ .

[0036] Concrete preparation steps are as follows:

[0037] Step 1, using an electronic balance to accurately weigh yttrium oxide [Y 2 o 3 ] 5.5307g, alumina [Al 2 o 3 ] 4.2559g, bismuth oxide [Bi 2 o 3 ] 0.0388g, neodymium oxide [Nd 2 o 3 ] 0.0281 g, ytterbium oxide [Y 2 o 3 ] 0.3288 g, placed in an agate mortar and ground for 1.5 hours and mixed evenly, then the crude drug powder obtained by grinding was transferred to a corundum crucible for subsequent use; after the mixed drug was ground, the average particle diameter of the mixed drug powder was detected 2 μm; then put it into a 50 mL corundum crucible to be sintered;

[0038] Step 2. Put the corundum crucible containing the raw material powder in step 1 into the tube furnace, and evacuate to a pressure of 0.01MPa in the furnace. After that, ...

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Abstract

The invention provides a Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material. A composition general formula of the luminescent material is Y3Al5O12:xBi<3+>, yNd<3+>, zYb<3+>, wherein x is greater than or equal to 0.5*10<-2> and less than or equal to 1*10<-2>, y is greater than or equal to 0.5*10<-2> and less than or equal to 2*10<-2> and z is greater than or equal to 1*10<-2> and less than or equal to 10*10<-2>. According to the Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material provided by the invention, Nd<3+>-Yb<3+> co-doping belongs to two-step energy transmission and has relatively high energy conversion efficiency; Bi<3+> in the luminescent material can be used for effectively expanding an absorption section of Nd<3+> through a sensitization effect; sunlight is subjected to broadband absorption so that high-efficiency and wide-spectrum conversion type near-infrared quantum cutting is realized; finally, the sunlight is sufficiently utilized and the conversion efficiency of a crystalline silicon solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of solid luminescent materials, in particular to a near-infrared quantum tailoring down-conversion luminescent Bi-Nd-Yb co-doped YAG high-efficiency wide-spectrum quantum tailoring luminescent material. Background technique [0002] In recent years, with the massive consumption of traditional fossil energy such as coal, oil, and natural gas, the problems of environmental pollution and energy depletion have become increasingly serious. Therefore, people have gradually turned their attention to solar energy, a renewable and clean energy. Crystalline silicon solar cells are currently the most widely used solar energy utilization devices. However, the photoelectric conversion efficiency of solar cells in actual production is only 19%, which is far lower than the theoretical maximum of 31%. [0003] An important reason for the low efficiency of crystalline silicon solar cells is spectral mismatch. The most radia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7774
Inventor 台玉萍柴元武李新忠刘红宇黄新辉杜西刚潘炳力
Owner HENAN UNIV OF SCI & TECH
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