A red, green and blue light all-inorganic perovskite quantum dot and porous glass composite luminescent material and preparation method thereof

A technology of porous glass and luminescent materials, applied in luminescent materials, glass manufacturing equipment, inorganic chemistry, etc., can solve the problems of ion concentration quenching, poor stability, and limited applications

Active Publication Date: 2020-10-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But at the same time, because the perovskite quantum dot material (all-inorganic lead halide) is a zero-dimensional material, it has a large specific surface area and high surface energy, and is greatly affected by the surface ligands. In the solid state, the luminous efficiency decays seriously, the stability is relatively poor, and clusters are easy to cause ion concentration quenching, which limits its further application in the field of luminescent materials such as white LEDs to a certain extent.

Method used

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  • A red, green and blue light all-inorganic perovskite quantum dot and porous glass composite luminescent material and preparation method thereof
  • A red, green and blue light all-inorganic perovskite quantum dot and porous glass composite luminescent material and preparation method thereof
  • A red, green and blue light all-inorganic perovskite quantum dot and porous glass composite luminescent material and preparation method thereof

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Effect test

Embodiment 2

[0038] (1) Accurately weigh 5.2917gSiO 2 , 4.8860g H 3 BO 3 , 1.2110gNa 2 CO 3 , 0.3333gCaCO 3 , mix the above raw materials and grind them evenly in an agate mortar to obtain a precursor mixture. Put the precursor mixture in a crucible and heat it up to 1000°C at a rate of 8°C / min in a temperature-programmed box-type resistance furnace, then heat it up to 1550°C at a rate of 5°C / min and keep it for 2 hours, then pour it on a cooled iron plate The obtained glass is quickly transferred to an annealing furnace and kept at 450°C for 2 hours. Then the glass was ground, polished and placed in a muffle furnace at 590°C for 24 hours. Place the glass in 1mol / L NaOH solution for 15min and wash until neutral; put the glass in distilled water at 95°C for 12h; L of HCl solution and 1.5mol / L of NH 4 Cl solution in a mixed solution, and heated in a water bath at 95°C for 18 hours; put the acid-leached porous glass in distilled water again at 95°C for 24 hours, then wash it with dist...

Embodiment 3

[0043] (1) Accurately weigh 5.2065gSiO 2 , 5.0916g H 3 BO 3 , 0.9879gNa 2 CO 3 , 0.3333gCaCO 3 , mix the above raw materials and grind them evenly in an agate mortar to obtain a precursor mixture. Put the precursor mixture in a crucible and heat it up to 1000°C at a rate of 8°C / min in a temperature-programmed box-type resistance furnace, then heat it up to 1500°C at a rate of 5°C / min for 2 hours, then pour it on a cooled iron plate The obtained glass is quickly transferred to an annealing furnace and kept at 450°C for 2h. Then the glass was ground, polished and placed in a muffle furnace at 620°C for 24 hours. Place the glass in 1mol / L NaOH solution for 15min and wash until neutral; soak the glass in distilled water at 98°C for 12h; and place the pretreated glass in a 0.5mol / L ratio of 1:1 HCl solution and 0.5mol / L NH 4 Cl solution, and heated in a water bath at 98°C for 36 hours; soak the acid-leached porous glass in distilled water at 98°C for 24 hours, then wash wit...

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Abstract

The invention discloses a preparation method of a red, green, blue light full inorganic perovskite quantum dot and porous glass composite luminescent material. Firstly, porous glass is prepared by a melt phase separation method, CsPbX3 (X=Cl, Br or I) quantum dots are prepared by a hot injection method, the CsPbX3 (X = Cl, Br or I) quantum dots are introduced into the porous glass by solution impregnation or multiple drop-wise adding to obtain the CsPbX3 quantum dot and porous glass composite luminescent material. The invention also discloses the red, green, blue light full inorganic perovskite quantum dot and porous glass composite luminescent material prepared by the preparation method. The CsPbX3 perovskite quantum dots and the porous glass are compounded, the superior luminescence property of the quantum dots in the solid state can be kept, and the protection and optimization of a pure quantum dot material can be realized.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a red, green and blue light all-inorganic perovskite quantum dot and porous glass composite luminescent material and a preparation method thereof. Background technique [0002] Quantum dots are semiconductor nanoparticles with a particle size between 2 and 20 nm, which belong to zero-dimensional nanomaterials. Due to the three-dimensional confinement, its quantum confinement is more obvious, it has a high quantum yield, and its fluorescence color can be adjusted according to the ion size, etc. It has a very wide application prospect in the fields of solar cells, fluorescent biomarkers and other solid-state luminescent technologies. Therefore, it has attracted continuous attention and research in the field of luminescent materials. In recent years, perovskite quantum dot materials (all-inorganic lead halides) have become a new research focus, which has a luminous wavelength that can cove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/078C03B19/02C01G21/00C03C23/00C09K11/66
CPCC01G21/006C01P2002/34C01P2002/72C01P2006/60C03B19/02C03C3/078C03C23/0095C09K11/665
Inventor 叶柿韩玉红孙佳奕张勤远
Owner SOUTH CHINA UNIV OF TECH
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