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Near-infrared quantum-cutting down-conversion luminescent transparent glass ceramic and preparation method and application thereof

A technology of quantum tailoring and transparent glass, which is applied in the field of rare earth-doped transparent glass ceramics and its preparation technology, can solve the problems of limiting the practical application of solar cells and poor transparency, and achieve improved photoelectric conversion efficiency, low cost, and reduced thermalization effect Effect

Inactive Publication Date: 2010-01-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the materials with the quantum tailoring effect of cooperative energy transfer reported in the literature so far are basically powders. Due to the serious scattering of incident light and poor transparency of powders, their practical application in solar cells is limited.

Method used

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  • Near-infrared quantum-cutting down-conversion luminescent transparent glass ceramic and preparation method and application thereof
  • Near-infrared quantum-cutting down-conversion luminescent transparent glass ceramic and preparation method and application thereof
  • Near-infrared quantum-cutting down-conversion luminescent transparent glass ceramic and preparation method and application thereof

Examples

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example 1

[0022] Example 1: Analytical pure SiO 2 , Al 2 O 3 , NaF, YF 3 and PrF with a purity of 99.99% 3 , YbF 3 Powder, according to 0.1PrF 3 : 0.5YbF 3 : 52SiO 2 : 25Al 2 O 3 : 12.4NaF: 10YF 3 (molar ratio) is accurately weighed and placed in an agate mortar, ground for more than half an hour to make it evenly mixed, then placed in a platinum crucible, heated to 1500 ℃ in a program-controlled high temperature box-type resistance furnace, and kept for 6 hours Then, pour the glass melt into the copper mold quickly to form; put the obtained precursor glass into a resistance furnace, anneal at 600 °C for 2 hours, and then cool with the furnace to eliminate internal stress. According to the results of differential thermal analysis (such as figure 1 ), the annealed glass was kept at 650 °C for 5 hours to obtain a light green transparent glass-ceramic; X-ray diffraction results showed that YF with an orthogonal structure was precipitated in the glass matrix 3 crystal phase (suc...

example 2

[0025] Example 2: Analytical pure SiO 2 , Al 2 O 3 , LiF, YF 3 and YbF with a purity of 99.99% 3 and PrF 3 Powder, according to 0.1PrF 3 : 1.0YbF 3 : 55SiO 2 : 25Al 2 O 3 : 3.9LiF: 15YF 3 (molar ratio) is accurately weighed and placed in an agate mortar, ground for more than half an hour to make it evenly mixed, then placed in a platinum crucible, heated to 1400°C in a program-controlled high-temperature box-type resistance furnace, and kept for 2 hours Then, pour the glass melt into the copper mold quickly to form; put the obtained precursor glass into a resistance furnace, anneal at 500 °C for 2 hours and then cool with the furnace to eliminate internal stress; keep the annealed glass at 600 °C In 2 hours, a pale green transparent glass ceramic was obtained. X-ray diffraction results show that YF with orthorhombic structure is precipitated in the glass matrix 3 Crystallographic phase; transmission electron microscopy observations show that a large amount of YF wi...

example 3

[0026] Example 3: Analytical pure SiO 2 , Al 2 O 3 , NaF, YF 3 and YbF with a purity of 99.99% 3 and TbF 3 Powder, according to 0.5TbF 3 : 2YbF 3 : 50SiO 2 : 25Al 2 O 3 : 10.5NaF: 12YF 3 (molar ratio) is accurately weighed, and after the same preparation and heat treatment process as in Example 1, a colorless and transparent glass-ceramic is obtained. The results of X-ray diffraction, transmission electron microscopy and energy dispersive spectroscopy showed that YF was precipitated in the glass ceramics. 3 crystal phase, and rare earth ions Tb and Yb are aggregated in the crystal phase. The surface of the sample was polished, and the emission spectrum at room temperature was measured with a FLS920 fluorescence spectrometer under the excitation condition of 487nm laser, and it was observed that the emission spectrum corresponds to Yb 3+ : 2 F 5 / 2 → 2 F 7 / 2 The quantum-tailored near-infrared light emission band of the transition (centered at 976 nm).

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Abstract

The invention discloses a near-infrared quantum-cutting down-conversion luminescent transparent glass ceramic and a preparation method and application thereof. The glass ceramic comprises the following compositions: 40 to 60 mol percent of SiO2, 10 to 30 mol percent of Al2O3, 5 to 25 mol percent of YF3, 0 to 15 mol percent of NaF, 0 to 15 mol percent of LiF, 0.01 to 5 mol percent of YbF, 0.01 to 5 mol percent of ReF, less than 0.5 mol percent of MSO4, and less than 0.02 mol percent of Fe, wherein the Re refers to Pr or Tb or Tm; M refers to Mg or Ca or Bar o Sr; and the contents of the NaF and the LiF are not 0 simultaneously. The glass ceramic can realize high-efficiency near-infrared quantum-cutting down-conversion luminescence under the excitation of blue light. The transparent glass ceramic is coupled with a silicon solar cell, and is hopeful to reduce the thermalization effect of the silicon solar cell and improve the photoelectric conversion efficiency of the cell.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a rare earth-doped transparent glass ceramic capable of realizing efficient near-infrared quantum tailoring down-conversion luminescence and a preparation process thereof. technical background [0002] In the face of the current situation that fossil energy is gradually depleted and the impact of large-scale consumption of fossil energy on the ecological environment is becoming increasingly prominent, it is urgent to develop and apply new and renewable energy. Silicon solar cell photovoltaic power generation is an important part of new energy and renewable energy. It is considered to be the most promising new energy technology in the world today. All developed countries have invested huge sums of money in research and development, and actively promoted the process of industrialization. Vigorously develop market applications. [0003] As we all know, the band gap of sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 陈大钦王元生余运龙黄萍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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