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A eu-nd-yb co-doped strontium aluminate high-efficiency broadband quantum tailoring luminescent material

A eu-nd-yb, luminescent material technology, applied in luminescent materials, semiconductor devices, chemical instruments and methods, etc., can solve the problems of low utilization rate of solar spectrum, low conversion efficiency of sunlight, low energy transfer efficiency, etc. Achieve the effect of improving photoelectric conversion efficiency, broad spectrum conversion and utilization, and broadening the absorption cross section

Active Publication Date: 2021-02-05
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above work still has the following disadvantages: (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

Method used

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  • A eu-nd-yb co-doped strontium aluminate high-efficiency broadband quantum tailoring luminescent material
  • A eu-nd-yb co-doped strontium aluminate high-efficiency broadband quantum tailoring luminescent material
  • A eu-nd-yb co-doped strontium aluminate high-efficiency broadband quantum tailoring luminescent material

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preparation example Construction

[0025] The Eu-Nd-Yb co-doped SrAl 2 o 4 A method for preparing a quantum tailoring luminescent material, comprising the following steps:

[0026] Step 1. Weigh the SrCO by a certain mole percentage 3 (A.R.), Al 2 o 3 (A.R.), Eu 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;

[0027] 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, pass argon to stabilize and then pass in hydrogen, adjust the gas flow to make the two The gas ratio is: 95%

[0028] Step 3: Turn on the tube furnace and evenly raise the temperature to 100°C at a rate of 1°C~5°C per minute and keep it warm for half an hour to remove the remaining moisture ...

Embodiment 1

[0036] A Eu-Nd-Yb co-doped SrAl 2 o 4 Quantum tailoring luminescent material, its composition formula is SrAl 2 o 4 : 0.5mol%Eu 2+ , 0.5mol% Nd 3+ , 5.0mol% Yb 3+ .

[0037] Concrete preparation steps are as follows:

[0038] Step 1. Accurately weigh strontium carbonate [SrCO 3 ] 5.4994g, alumina [Al 2 o 3 ]4.0423g, europium oxide [Eu 2 o 3 ] 0.0349g, neodymium oxide [Nd 2 o 3 ] 0.0310 g, ytterbium oxide [Yb 2 o 3 ] 0.3904 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;

[0039] Step 2. Put the corundum crucible containing the raw material drug powder in step 1 into the tube furnace, and evacuate the furnace to a pressure of 0.01 MPa. After that, feed argon until the fl...

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Abstract

A kind of Eu-Nd-Yb co-doped strontium aluminate high-efficiency wide-spectrum quantum tailoring luminescent material, the luminescent material is based on SrAl 2 o 4 is the matrix, and the general composition formula of the luminescent material is SrAl 2 o 4 : x Eu 2+ , y Nd 3+ , z Yb 3+ , where, 0.5×10 ‑2 ≤x≤1×10 ‑2 , 0.5×10 ‑2 ≤y≤2×10 ‑2 , 1×10 ‑2 ≤z≤10×10 ‑2 . A kind of Eu-Nd-Yb co-doped SrAl provided by the invention 2 o 4 Quantum tailored luminescent material, Eu in the luminescent material system 2+ Through its sensitization effect, it can effectively broaden the Nd 3+ Absorption cross-section, broadband absorption of sunlight, and then realize efficient, wide-spectrum conversion near-infrared quantum tailoring. Thereby realizing full utilization of sunlight and improving conversion efficiency of crystalline silicon solar cells.

Description

technical field [0001] The invention relates to the technical field of solid luminescent materials, in particular to a Eu-Nd-Yb co-doped SrAl with near-infrared quantum tailoring down-conversion luminescence 2 o 4 High-efficiency broad-spectrum quantum tailoring luminescent materials. Background technique [0002] In recent years, due to the global energy crisis and severe environmental pollution, renewable and clean energy represented by solar energy has become the direction of the development of a new generation of energy system. Crystalline silicon solar cells are currently the most reasonable and effective devices for utilizing solar energy and are widely used. However, in actual production, its photoelectric conversion efficiency is only up to 19.0%, which is far lower than the maximum theoretical value of 31%. [0003] Spectral mismatch is an important reason for the low efficiency of crystalline silicon solar cells. In the solar spectrum (300~2500 nm) irradiated t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64H01L31/0264
CPCC09K11/7792H01L31/0264
Inventor 台玉萍柴元武李新忠刘红宇杜西刚杜锦屏黄新辉潘炳力
Owner HENAN UNIV OF SCI & TECH
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