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CsPbX3 nano-crystal doped boron-containing glass and preparation method thereof

A technology of nanocrystalline and boron glass, which is applied in the field of CsPbX3 nanocrystalline doped boron-containing glass and its preparation, can solve the problems of poor optical quality of glass and difficulty in meeting application requirements, and achieve the promotion of clarification and homogenization, and the nanocrystalline size can be adjusted control, the effect of excellent optical performance

Active Publication Date: 2018-08-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, since the sol-gel of the glass has not undergone a high-temperature melting process, the glass matrix has a certain porosity, and the optical quality of the glass is poor, which is difficult to meet the application requirements.

Method used

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  • CsPbX3 nano-crystal doped boron-containing glass and preparation method thereof
  • CsPbX3 nano-crystal doped boron-containing glass and preparation method thereof
  • CsPbX3 nano-crystal doped boron-containing glass and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh raw materials according to the following atomic mole percentages, Si: 4.71%, B: 27.75%, O: 56.94%, Cs: 1.05%, Pb: 1.31%, Br: 2.09%, Ca: 3.14%, Na: 2.09%, Zn : 0.92%. After mixing evenly, melt at 1100-1300°C for 20-60 minutes, then cool to shape, and anneal at about 350°C to eliminate residual stress to obtain transparent glass (hereinafter referred to as original glass, represented by AP). Cut it into a specific size, treat it at 480-530°C for 3-10 hours, and cool it to room temperature with the furnace to obtain CsPbBr 3 The nanocrystal-doped transparent glass is polished and tested. figure 1 and figure 2 It is the original glass and its absorption spectrum under different heat treatment temperature and time, AP represents the original glass sample without heat treatment, 480℃ / 10h, etc. represent the heat treatment temperature and time conditions, figure 2 It is the fluorescence spectrogram of the sample in this example under 365nm laser excitation. It can ...

Embodiment 2

[0048] The raw materials were weighed according to the following atomic mole percentages, B: 33.90%, O: 56.17%, Ca: 3.15%, Cs: 1.45%, Pb: 1.45%, Br: 1.94%, Na: 1.94%. After mixing evenly, melt at 1100-1300°C for 20-60 minutes, then cool to shape, and anneal at about 350°C to eliminate residual stress to obtain transparent glass. Cut it into a specific size, treat it at 480-550°C for 10 hours, and cool it to room temperature with the furnace to obtain CsPbBr 3 The nanocrystal-doped transparent glass is polished and tested. Absorption spectra and fluorescence spectra of samples under different heat treatment temperatures and times, as shown in image 3 and Figure 4 As shown, the adjustable range of fluorescence peak wavelength is 503-518nm, and the quantum efficiency of the glass sample treated at 500°C for 10h is 21.4%.

Embodiment 3

[0050] Weigh raw materials according to the following atomic mole percentages, Si: 5.33%, B: 26.67%, O: 54.95%, Cs: 2.66%, Pb: 0.8%, I: 3.73%, Ca: 0%, Na: 3.73%, Zn : 2.13%, mixed evenly and melted at 1100-1300°C for 20-60 minutes, then cooled and formed, and annealed at about 350°C to eliminate residual stress to obtain transparent glass. Cut it into a specific size, treat it at 440-500°C for 3-10 hours, and cool it to room temperature with the furnace to obtain CsPbI 3 The nanocrystal-doped transparent glass is polished and tested. Absorption spectra and fluorescence spectra of samples under different heat treatment temperatures and times, as shown in Figure 5 and Figure 6 As shown, the adjustable range of fluorescence peak wavelength is 644-696nm, and the quantum efficiency of the glass sample treated at 480°C for 10h is 20.8%.

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Abstract

The invention provides CsPbX3 nano-crystal doped boron-containing glass and a preparation method thereof. The atom molar percentage of elements in the CsPbX3 nano-crystal doped boron-containing glassis as follows: Si: 0 to 9.18 percent, B: 26.02 to 33.90 percent, O: 54.01 to 57.96 percent, Cs: 1.00 to 2.66 percent, Pb: 0.39 to 2.02 percent, X: 1.76 to 3.73 percent, M: 0 to 5.10 percent, N: 0 to 3.73 percent and Zn: 0 to 2.13 percent, wherein X is one or a mixture of more than two of Cl, Br or I, M is one or a mixture of more than two of Ca, Sr or Ba, and N is one or a mixture of more than twoof Li, Na or K. The process is simple and easy to operate, the price is low, the nano-crystal has controllable size, and light within a certain range of the visible light waveband can be obtained; furthermore, the CsPbX3 nano-crystal doped boron-containing glass has an excellent optical property, can obtain light within a certain range of the visible light waveband, has high transmittance and haspotential application in various fields of LEDs, solar batteries, nano-crystal lasers and the like.

Description

technical field [0001] The invention belongs to the field of luminescent materials, in particular to a CsPbX 3 Nanocrystalline doped boron-containing glass and its preparation method. Background technique [0002] Semiconductor nanocrystals are small in size and affected by the quantum confinement effect. Their energy band structure is a discrete energy level structure. As the size of nanocrystals gradually decreases, their forbidden band width gradually increases. bands of absorption and fluorescence. [0003] Perovskite semiconductor material CsPbX 3 (X=Cl, Br, I) The band gap energy is CsPbCl respectively 3 :2.97eV; CsPbBr 3 :2.30eV; CsPbI 3 : 1.73eV. Chemically synthesized CsPbX 3 Nanocrystalline fluorescence quantum yield can reach more than 90%, with narrow half-width and short fluorescence lifetime, perovskite CsPbX 3 Nanocrystal is a promising optical material. [0004] There are many methods for preparing nanocrystals, such as thermal injection, hydrotherma...

Claims

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Application Information

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IPC IPC(8): C03C14/00C03C4/12C01G21/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G21/006C03C4/12C03C14/006
Inventor 刘超艾兵韩建军赵修建
Owner WUHAN UNIV OF TECH
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