Narrow-particle size distribution PbS quantum dot-doped glass and preparation method thereof

A technology of quantum dot glass and doped glass, which is applied in the field of PbS quantum dot doped glass and its preparation, can solve the problems that quantum dots are not easy to control, restrict the application and development of quantum dot doped glass, and have a wide particle size distribution of quantum dots. , to achieve the effect of simple preparation method, strong luminescence performance and good thermal stability

Active Publication Date: 2017-07-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, quantum dots prepared in glass also have some disadvantages, such as quantum dots are not easy to control, and the particle size distribution of quantum dots is wide, which greatly restricts the application and development of quantum dot-doped glass.

Method used

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  • Narrow-particle size distribution PbS quantum dot-doped glass and preparation method thereof
  • Narrow-particle size distribution PbS quantum dot-doped glass and preparation method thereof
  • Narrow-particle size distribution PbS quantum dot-doped glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare the PbS quantum dot-doped glass with narrow particle size distribution, the method is as follows:

[0019] 1) Preparation of glass substrate: 50SiO2 according to molar percentage 2 -25Na 2 O-5Al 2 o 3 -7.2ZnO-10CaO-2ZnS-0.8PbO After weighing the raw materials and mixing them evenly, they are melted in a high-temperature furnace at 1400°C and formed, and annealed to eliminate stress.

[0020] 2) Prepare PbS quantum dot-doped glass; heat-treat the glass obtained in step 1) at temperatures of 520°C, 530°C, 540°C, 550°C and 560°C for 10 hours, thereby preparing the average particle size in the glass matrix. The particle size distributions of PbS quantum dots of 1.87nm, 2.28nm, 3.20nm, 4.01nm and 4.66nm are 7.30%, 6.03%, 4.91%, 5.42% and 6.88%, respectively. Taking 1.87nm and particle size distribution of 7.30% as an example, the particle size is within the range of 1.87±(1.87*7.30%)=1.73nm-2.01nm.

[0021] After testing, the central wavelengths of the absorptio...

Embodiment 2

[0027] Prepare the PbS quantum dot-doped glass with narrow particle size distribution, the method is as follows:

[0028] 1) Preparation of glass substrate: 52SiO according to molar percentage 2 -20Na 2 O-7Al 2 o 3 -6.4ZnO-11CaO-3ZnS-0.6PbO, after weighing the raw materials and mixing them evenly, they are melted in a high temperature furnace at 1400°C and formed, and annealed to eliminate stress.

[0029] 2) Prepare PbS quantum dot-doped glass; heat-treat the glass obtained in step 1) at temperatures of 510°C, 520°C, 530°C, 540°C, 550°C and 560°C for 10 hours, thereby preparing average PbS quantum dots with particle sizes of 1.34nm, 1.49nm, 2.16nm, 2.40nm, 3.10nm and 4.02nm respectively have particle size distributions of 10.18%, 10.05%, 6.86%, 5.89%, 6.19% and 7.18%.

[0030] After testing, the central wavelengths of the absorption peaks of the narrow particle size distribution PbS quantum dot-doped glass prepared in this example are 703nm, 787nm, 1079nm, 1179nm, 1459nm ...

Embodiment 3

[0033] Prepare the PbS quantum dot-doped glass with narrow particle size distribution, the method is as follows:

[0034] 1) Preparation of glass substrate: 50SiO2 according to molar percentage 2 -22Na 2 O-6Al 2 o 3 -5.8ZnO-12CaO-4ZnS-0.2PbO), weigh the raw materials and mix them evenly, melt them in a high-temperature furnace at 1400°C, shape them, and anneal them to eliminate stress.

[0035]2) Prepare PbS quantum dot-doped glass; heat-treat the glass substrate obtained in step 1) at temperatures of 500°C, 510°C, 520°C, 530°C, 540°C, 550°C and 560°C for 10 hours, so that the glass substrate PbS quantum dots with average particle diameters of 1.40nm, 1.52nm, 1.74nm, 2.07nm, 3.12nm, 4.12nm and 5.88nm were prepared, and the particle size distributions were 8.66%, 7.75%, 7.87%, 7.87% , 5.49%, 5.12% and 6.38%.

[0036] After testing, the central wavelengths of the absorption peaks of the narrow particle size distribution PbS quantum dot-doped glass prepared in this example a...

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Abstract

The invention discloses narrow-particle size distribution PbS quantum dot-doped glass. The narrow-particle size distribution PbS quantum dot-doped glass comprises a glass matrix and PbS quantum dots doped into the glass matrix, wherein the glass matrix comprises the following components: 45-55 mol% of SiO2, 20-30 mol% of Na2O, 3-10 mol% of Al2O3, 8-12 mol% of MO, 5-8 mol% of ZnO, 1-6 mol% of ZnS and 0.1-1 mol% of PbO, the sum is 100 mol%; M represents an alkaline earth element. Through the components and the preparation method of the glass provided by the invention, controllable preparation of the PbS quantum dots with the particle size distribution of 4.91-12.37% in the glass matrix can be achieved; the particle sizes of the prepared quantum dots in the glass matrix are adjustable, and adjustable fluorescence of the PbS quantum dot-doped glass in an infrared band can be achieved, so that the narrow-particle size distribution PbS quantum dot-doped glass is a light-emitting material with a very good application prospect.

Description

technical field [0001] The invention relates to the field of luminescent functional materials, in particular to a PbS quantum dot-doped glass with narrow particle size distribution and a preparation method thereof. Background technique [0002] In recent decades, due to its three-dimensional size smaller than its exciton Bohr radius, quantum dot materials have the characteristics of quantum confinement effect, size effect and surface effect, and then exhibit many unique optical properties and physical properties different from bulk materials. performance. [0003] The PbS bulk material has a smaller bandgap energy of 0.41eV and a larger exciton Bohr radius of about 20nm, so that the quantum confinement effect of PbS quantum dots is more obvious, and the bandgap can be adjusted in a larger range, which can realize absorption spectrum and luminescence. The adjustment of the spectrum in the near-infrared to mid-infrared band makes it have great application potential in the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C3/105
Inventor 刘超张文超韩建军赵修建
Owner WUHAN UNIV OF TECH
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