CsPbBr3 (cesium-lead-bromide) perovskite quantum dot fluorescent glass for display of wide color gamut and preparation method and application thereof

A technology of cesium-lead-bromide perovskite and fluorescent glass, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of unfavorable quantum dots, reduce usage, Br volatilization, etc., achieve luminous intensity without attenuation, high water oxygen Stability, high photostability effect

Active Publication Date: 2019-10-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the current CsPbBr 3 The research on quantum dot fluorescent glass has achieved remarkable results, but it is still in its infancy, and there are still various problems: (1) CsPbBr 3 The quantum efficiency of quantum dot fluorescent glass under blue light excitation is generally low and needs to be further improved; (2) CsPbBr 3 It is difficult to realize the uniform precipitation of quantum dot fluorescent glass; (3) the chemical stability and moisture resistance of the phosphate glass system are poor, and the CsPbBr cannot be effectively improved. 3 The wa

Method used

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  • CsPbBr3 (cesium-lead-bromide) perovskite quantum dot fluorescent glass for display of wide color gamut and preparation method and application thereof
  • CsPbBr3 (cesium-lead-bromide) perovskite quantum dot fluorescent glass for display of wide color gamut and preparation method and application thereof
  • CsPbBr3 (cesium-lead-bromide) perovskite quantum dot fluorescent glass for display of wide color gamut and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: the present embodiment CsPbBr 3 The chemical composition mole percentage (mol%) of perovskite quantum dot fluorescent glass is: 18GeO 2 -20SiO2 2 -32B 2 o 3 -5Al 2 o 3 -5SrCO 3 -4ZnO-8Cs 2 CO 3 -3PbBr 2 -5NaBr

[0041] CsPbBr in Table 1 Example 1 3 Raw material composition of perovskite quantum dot fluorescent glass

[0042] raw material GeO 2

[0043] Accurately weigh and analyze pure germanium dioxide (GeO 2 ), silicon dioxide (SiO 2 ), boron oxide (B 2 o 3 ), alumina (Al 2 o 3 ), strontium carbonate (SrCO 3 ), zinc oxide (ZnO), cesium carbonate (Cs 2 CO 3 ), lead bromide (PbBr 2 ), sodium bromide (NaBr). Put the accurately weighed raw materials into an agate mortar and grind them thoroughly, mix them evenly, place them in a corundum crucible, and melt them in a box furnace at 1200°C for 1 hour, then take out the glass melt and quickly pour it into preheated graphite Molded in a mold to obtain a bulk precursor glass, p...

Embodiment 2

[0044] Embodiment 2: the present embodiment CsPbBr 3 The chemical composition mole percentage (mol%) of perovskite quantum dot fluorescent glass is: 38GeO 2 -34B 2 o 3 -5Al 2 o 3 -5SrCO 3 -4ZnO-8Cs 2 CO 3 -3PbBr 2 -3NaBr

[0045] CsPbBr in Table 2 Example 2 3 Raw material composition of perovskite quantum dot fluorescent glass

[0046] raw material GeO 2

[0047] Accurately weigh and analyze pure germanium dioxide (GeO2) according to Table 2 2 ), boron oxide (B 2 o 3 ), alumina (Al 2 o 3 ), strontium carbonate (SrCO 3 ), zinc oxide (ZnO), cesium carbonate (Cs 2 CO 3 ), lead bromide (PbBr 2 ), sodium bromide (NaBr). Put the precisely weighed raw materials in an agate mortar and grind them thoroughly, mix them evenly, place them in a corundum crucible, and melt them in a box furnace at 1100°C for 0.5h, then take out the glass melt and quickly pour it into a preheated Molding in a graphite mold to obtain bulk precursor glass, put the obtained pre...

Embodiment 3

[0048] Embodiment 3: the present embodiment CsPbBr 3 The chemical composition mole percentage (mol%) of perovskite quantum dot fluorescent glass is: 40SiO 2 -32B 2 o 3 -3Al 2 o 3 -4SrCO 3 -5ZnO-8Cs 2 CO 3 -4PbBr 2 -4KBr

[0049] CsPbBr in Table 3 Example 3 3 Raw material composition of perovskite quantum dot fluorescent glass

[0050] raw material SiO 2

[0051] Accurately weigh and analyze pure silicon dioxide (SiO2) according to Table 2 2 ), boron oxide (B 2 o 3 ), alumina (Al 2 o 3 ), strontium carbonate (SrCO 3 ), zinc oxide (ZnO), cesium carbonate (Cs 2 CO 3 ), lead bromide (PbBr 2 ), potassium bromide (KBr). Put the accurately weighed raw materials into an agate mortar and grind them thoroughly, mix them evenly, place them in a corundum crucible, and melt them in a box furnace at 1250°C for 0.5h, then take out the glass melt and quickly pour it into a preheated Molding in a graphite mold to obtain bulk precursor glass, put the obtained p...

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Abstract

The invention belongs to the technical field of display of fully-organic perovskite quantum dots, and discloses a CsPbBr3 (cesium-lead-bromide) perovskite quantum dot fluorescent glass for display ofwide color gamut and a preparation method and application thereof. The CsPbBr3 perovskite quantum dot fluorescent glass comprises the following components in percentage by mole: 0 to 45% of SiO2 (silicon dioxide), 0 to 45% of GeO2 (germanium dioxide), 30 to 40% of B2O3 (boron oxide), 2 to 8% of Al2O3 (aluminum oxide), 3 to 7% of MCO3 (metal carbonate), 1 to 5% of ZnO (zinc oxide), 5 to 15% of CsBr(cesium bromide) or Cs2CO3 (cesium carbonate), 2 to 10% of PbBr2 (lead bromide) or PbO (lead oxide), and 3 to 15% of NaBr (sodium bromide) or KBr (potassium-bromide), wherein M is Ca (calcium) or Sr(strontium); the sum of the components in percentage by mole is 100%. The CsPbBr3 perovskite quantum dot fluorescent glass has the advantages that the technology is simple, and the operation is easy;after in-situ crystallization, the quantum efficiency is higher, the light emitting stability is obviously improved, and the broad application prospect is realized.

Description

technical field [0001] The invention belongs to the technical field of all-inorganic perovskite quantum dot display, in particular to a cesium lead bromide (CsPbBr) display with a wide color gamut. 3 ) perovskite quantum dot fluorescent glass and its preparation method and application. Background technique [0002] Rec.2020 has become the next-generation display color gamut standard after NTSC. In order to achieve richer colors and excellent detail performance, it is urgent to develop new narrow-band emitting fluorescent materials. At present, the mainstream technical solution to realize wide color gamut display based on backlight liquid crystal display (Liquid-Crystal Display, LCD) is "blue light LED+β-SiAlON:Eu 2+ Green Phosphor+K 2 SiF 6 :Mn 4+ Red phosphor", wherein, red phosphor K 2 SiF 6 :Mn 4+ Because of its sharp-line emission (half-peak width<5nm) characteristics that can meet the requirements of wide color gamut display for red light materials, commercial...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B32/02C03C4/12H01L33/50
CPCC03B32/02C03C4/12C03C10/16H01L33/504
Inventor 张学杰庞小亮谢丽青张浩然雷炳富庄健乐刘应亮
Owner SOUTH CHINA AGRI UNIV
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