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Transparent glass ceramics with quantum cutting luminescence characteristics and preparation method thereof

A technology of luminescent properties, glass ceramics, applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problems of limited practical application, poor transparency, serious scattering, etc., achieve good mechanical properties and thermal stability, low cost, and preparation technology simple effect

Inactive Publication Date: 2010-10-13
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the materials with near-infrared quantum tailoring effect 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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  • Transparent glass ceramics with quantum cutting luminescence characteristics and preparation method thereof
  • Transparent glass ceramics with quantum cutting luminescence characteristics and preparation method thereof
  • Transparent glass ceramics with quantum cutting luminescence characteristics and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0018] Example 1: Analytical pure SiO 2 、Al 2 o 3 , NaF, YF 3 and a purity of 99.99% YbF 3 Powder, according to 0.5YbF 3 : 52SiO 2 : 25Al 2 o 3 : 12.5NaF : 10TbF 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°C in a program-controlled high-temperature box-type resistance furnace, and then kept for 6 hours , and then, pour the melt into a copper mold and quickly cool it to form a precursor glass; put the 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, the annealed glass was kept at 650°C for 5 hours to obtain colorless and transparent glass ceramics; the results of X-ray diffraction showed that TbF with orthorhombic structure was precipitated in the glass matrix. 3 crystal phase (eg figure 1 shown)...

example 2

[0020] Example 2: 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 1.0YbF 3 : 52SiO 2 : 25Al 2 o 3 :12NaF:10TbF 3 The proportioning of (molar ratio) is accurately weighed, and after the same preparation and heat treatment process as Example 1, a colorless and transparent glass-ceramic is obtained. The results of X-ray diffraction, transmission electron microscopy and energy spectrum analysis showed that TbF precipitated in glass ceramics 3 nanocrystalline phase, and the rare earth ion Yb gathers in the crystal phase. After the sample is surface polished, the emission spectrum at room temperature is measured with a FLS920 fluorescence spectrometer under the excitation condition of 485nm, and it is observed that the corresponding Yb 3+ : 2 f 5 / 2 → 2 f 7 / 2 Transitional near-infrared quantum tailoring emission band (central wavelength 976nm). By calculating the fluorescence decay curve of the sample, the t...

example 3

[0021] Example 3: Analytical pure SiO 2 、Al 2 o 3 , NaF, YF 3 and YbF with a purity of 99.99% 3 and TmF 3 Powder, according to 1.5YbF 3 : 52SiO 2 : 25Al 2 o 3 : 11.5NaF : 10TbF 3 The proportioning of (molar ratio) is accurately weighed, and after the same preparation and heat treatment process as Example 1, a colorless and transparent glass-ceramic is obtained. The results of X-ray diffraction, transmission electron microscopy and energy spectrum analysis showed that TbF precipitated in glass ceramics 3 In the nanocrystalline phase, rare earth ions Yb gather in the crystalline phase. After the sample is surface polished, the emission spectrum at room temperature is measured with a FLS920 fluorescence spectrometer under the excitation condition of 485nm, and it is observed that the corresponding Yb 3+ : 2 f 5 / 2 → 2 f 7 / 2 Transitional near-infrared quantum tailoring emission band (central wavelength 976nm). By calculating the fluorescence decay curve of the sampl...

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Abstract

The invention discloses transparent glass ceramics with quantum cutting luminescence characteristics and a preparation method and purposes thereof. The glass ceramics comprises the following components: 40 to 60mol percent of SiO2, 10 to 30mol percent of Al2O3, 5 to 25mol percent of TbF3, 0 to 15mol percent of NaF, 0 to 15mol percent of LiF, 0.01 to 5mol percent of YbF3, less than 0.5mol percent of MSO4, less than 0.02mol percent of Fe, and M refers to Mg, Ca, Ba or Sr. The glass ceramics has the following microstructure characteristic that: TbF3 nanocrystallines which are doped with rare earth and is an orthogonal structure are uniformly distributed in a glass substrate. The glass ceramic material can be excited by blue light to realize converting and giving off light under the high-efficiency near infrared quantum cutting. By being coupled with a silicon solar cell, the transparent glass ceramics is expected to reduce the heating effect of the 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 new type of material that can effectively improve the photoelectric conversion efficiency of silicon solar cells, and in particular to a rare earth that can convert blue light with a shorter wavelength into near-infrared light that can be efficiently utilized by silicon solar cells Doped transparent glass ceramics and its preparation process. Background technique [0002] With the rapid development of society, energy shortages and environmental problems caused by the extensive use of traditional fossil energy (such as coal, oil, etc.) have become increasingly prominent. All developed countries have invested huge sums of money in competing to research and develop new clean and renewable energy sources. Silicon solar cell photovoltaic power generation is an important part of new energy and renewable energy, and is considered to be the most promising new energy technolo...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B32/02H01L31/055
CPCY02E10/50Y02E10/52
Inventor 翁方轶陈大钦王元生余运龙
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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