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CdTe quantum-dot doped glass and preparation method thereof

A technology of doping glass and quantum dots, applied in glass manufacturing equipment, glass pressing, glass molding, etc., can solve the problems of narrow glass emission spectrum coverage, inability to cover the visible light region, and weak intrinsic luminescence of quantum dots, etc. Achieve the effect of wide luminous coverage, strong controllability and low cost

Active Publication Date: 2016-02-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most research groups on CdTe quantum dot-doped glass focus on phosphate glass, but phosphate glass is unstable compared with silicate glass, and the emission spectrum coverage of the prepared glass is narrow, which cannot cover the entire visible light. area
Dantas et al [J.AlloysCompd.2015,637,466-470] prepared CdTe quantum dot-doped glass in borosilicate, but the defect luminescence is obvious, and the intrinsic luminescence of quantum dots is weak

Method used

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  • CdTe quantum-dot doped glass and preparation method thereof
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  • CdTe quantum-dot doped glass and preparation method thereof

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Experimental program
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Embodiment 1

[0030] The glass chemical composition of this embodiment is SiO 2 : 50mol%; Na 2 O: 25mol%; Al 2 o3 ZnO: 8mol%; BaO: 10mol%; ZnTe: 1mol%; CdO: 1mol%. The glass raw material is SiO 2 、Na 2 SiO 3 、Al 2 o 3 , ZnO, BaCO 3 , ZnTe, CdO. The optical alkalinity of glass is 0.640. Weigh each component according to the mole percentage, mix them evenly, put them in a closed corundum crucible, and melt them at 1350°C for 40 minutes, then pour the melt on a metal copper mold for rapid quenching and forming, put it into an annealing furnace at 300 ℃ annealing for 3 hours, and after cooling with the furnace, the original glass is obtained, which is denoted as S1.

[0031] Then put the original glass in a heat treatment furnace, heat treatment at 530°C, 550°C, 570°C, and 590°C for 10h and 20h respectively, and cool to room temperature with the furnace to obtain a CdTe quantum dot silicate glass sample, absorption spectrum and fluorescence spectrum Figure respectively as Figure 1-...

Embodiment 2

[0033] The glass chemical composition of this embodiment is SiO 2 : 50mol%; Na 2 O: 25mol%; Al 2 o 3 ZnO: 10mol%; BaO: 10mol%; ZnTe: 1mol%; CdO: 1mol%. The optical alkalinity of glass is 0.640. The glass raw material is SiO 2 、Na 2 SiO 3 、Al 2 o 3 , ZnO, BaCO 3 , ZnTe, CdO. Weigh each component according to the mole percentage, mix them evenly, put them in a closed corundum crucible, and melt them at 1350°C for 40 minutes, then pour the melt on a metal copper mold for rapid quenching and forming, put it into an annealing furnace at 300 ℃ annealing for 3 hours, and after cooling with the furnace, the original glass is obtained, which is denoted as S2.

[0034] Then put the original glass in a heat treatment furnace, heat treatment at 530°C, 550°C, 570°C, and 590°C for 10h and 20h respectively, and cool to room temperature with the furnace to obtain a CdTe quantum dot silicate glass sample, absorption spectrum and fluorescence spectrum Figure respectively as Figure...

Embodiment 3

[0036] The glass chemical composition of this embodiment is SiO 2 : 50mol%; Na 2 O: 20mol%; Al 2 o 3 ZnO: 8mol%; BaO: 15mol%; ZnTe: 1mol%; CdO: 1mol%. The optical alkalinity of glass is 0.640. The glass raw material is SiO 2 、Na 2 SiO 3 、Al 2 o 3 , ZnO, BaCO 3 , ZnTe, CdO. Weigh each component according to the mole percentage, mix them evenly, put them in a closed corundum crucible, and melt them at 1400°C for 40 minutes, then pour the melt on a metal copper mold for rapid quenching and forming, put it into an annealing furnace at 300 ℃ annealing for 3 hours, and after cooling with the furnace, the original glass is obtained, which is denoted as S3.

[0037] Next, the original glass was placed in a heat treatment furnace, heat-treated at 570°C, 590°C, 610°C, 630°C, 650°C, and 670°C for 10 hours, and cooled to room temperature with the furnace to obtain a CdTe quantum dot silicate glass sample. The spectra and fluorescence spectra are shown in Figure 7-8 shown. S...

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Abstract

The invention discloses CdTe quantum-dot doped glass. The glass consists of the following components: 40 to 60 percent by mol of SiO2; 10 to 30 percent by mol of Na2O and CaO; 1 to 15 percent by mol of Al2O3; 5 to 15 percent by mol of ZnO; 5 to 20 percent by mol of BaO; 1 to 2 percent by mol of ZnTe; 0.5 to 2 percent by mol of CdO, and the sum of the glass components is 100 percent by mol. The preparation method of the quantum-dot doped glass comprises the following steps: pouring glass melt into a mold, pressing, forming, then annealing for 3 hours at a temperature approximate to a glass transformation temperature, and then heat treating the transparent glass. By adjusting the heat treatment system, the size of a quantum dot is controlled, and the intrinsic photoluminescence with continuous adjustable wavelength of the quantum dot in a range of 550nm to 800nm is further realized. The prepared quantum-dot doped glass has good chemical stability, extremely low ratio of the quantum dot defect luminescence and intrinsic photoluminescence, relatively high fluorescent quantum efficiency and promising application prospect.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a CdTe quantum dot doped glass and a preparation method thereof. Background technique [0002] Quantum dots, that is, semiconductor nanocrystals with a radius close to or smaller than the exciton Bohr radius, are a zero-dimensional semiconductor nanomaterial. Due to the quantum size effect, quantum confinement effect, surface effect, quantum tunneling effect, and Coulomb blocking effect, quantum dots have a series of good optical and electrical properties. [0003] Researchers from various countries have carried out a lot of research on quantum dots. According to the combination of different groups, they can be divided into the following four types: ①I-VII groups, including AgI, CuCl, CuBr, etc.; ②II-VI groups, including CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, etc.; ③ III-V group, including GaAs, GaN, etc.; The belt width varies widely. [0004] CdTe quantum dots are a kind of C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C3/087C03B11/00C03B25/00
Inventor 刘超李文珂夏梦玲王静赵志永张继红韩建军赵修建
Owner WUHAN UNIV OF TECH