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

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...

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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 water and oxygen stability of quantum dots; (4) The synthesis temperature of glass systems such as borosilicate is relatively high, which leads to serious volatilization of Br, which is not conducive to CsPbBr 3 Generation of quantum dots; (5) GeO required for germanate glass system 2 The raw materials are relatively expensive, and their usage should be reduced as much as possible; (5) Cs source, Pb source, and Br source have a significant impact on the CsPbBr source in the glass system. 3 The precipitation effect of quantum dots is more obvious, but the mechanism is not clear

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