Preparation method of manganese-doped all-inorganic lead chloride perovskite nanosheets

A technology of manganese doping and perovskite, applied in nanotechnology, nano optics, nanotechnology, etc., to achieve high fluorescence quantum efficiency, good stability, and strong stability

Inactive Publication Date: 2018-07-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, manganese doping in nanosheets with uni

Method used

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  • Preparation method of manganese-doped all-inorganic lead chloride perovskite nanosheets
  • Preparation method of manganese-doped all-inorganic lead chloride perovskite nanosheets
  • Preparation method of manganese-doped all-inorganic lead chloride perovskite nanosheets

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Experimental program
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Embodiment 1

[0031] In Example 1, manganese-doped lead chloride perovskite nanosheets were synthesized by a high-temperature liquid phase method, which specifically included the following steps:

[0032] (1) Metal chloride salt PbCl 2 and MnCl 2 According to the molar ratio of 2:3 (lead chloride 20.9mg, manganese chloride 14.2mg), add 1.5mL oleic acid, 1.5mL oleylamine, 1mL TOP 5mL 1-octadecene solution, heat to 120 ° C, completely under vacuum dissolve.

[0033] (2) Under nitrogen protection, inject 0.4 mL of cesium source precursor CsOA into the solution in (1) above. Wherein, the preparation method of the added cesium oleate (CsOA) precursor solution is: 814mg cesium carbonate CsCO 3 , 2.5mL oleic acid OA, 40mL 1-octadecene were added to a 100mL three-necked flask, the temperature was raised to 120°C under vacuum and kept for 1h, then the temperature was raised to 150°C and kept for 4h, and the heating was removed and naturally cooled to room temperature.

[0034] (3) Continue to ra...

Embodiment 2

[0037] Similar to Example 1, the difference is that manganese-doped lead chloride perovskite nanosheets can also be obtained by prolonging the reaction time in Example 1 to 20 min.

Embodiment 3

[0039] Similar to Example 1, the difference is that by adjusting five groups of PbCl 2 / MnCl 2 The ratiometric spectra contrast the effect of manganese doping concentration on the luminescent properties. Such as Figure 5 As shown, when the adjusted ratios are Pb:Mn=4:1, 3:2, 1:1, 2:3, 1:4, there are differences in the luminous efficiency of manganese with different ratios of Pb and Mn, wherein the ratio is The luminous efficiency of the material is the highest at 2:3.

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Abstract

The invention discloses a preparation method of manganese-doped all-inorganic lead chloride perovskite nanosheets. The method comprises the following steps: adding cesium carbonate into a mixed solution of 1-octadecene and oleic acid to prepare a cesium oleate precursor solution; then, adding metal chlorides PbCl2 and MnCl2, oleic acid, oleylamine and trioctylphosphine into a 1-octadecene solution, heating up to 100-120 DEG C under the vacuum condition to obtain a mixed solution; finally, injecting the mixed solution into the cesium oleate precursor solution, which is heated up to 100-120 DEGC, in a vacuum or an inert atmosphere, continuously heating up to 180-240 DEG C, carrying out heat preservation for 10-30 minutes, cooling and then centrifugally cleaning to obtain the manganese-dopedall-inorganic lead chloride perovskite nanosheets. The synthesis method provided by the invention is simple and convenient to operate and high in repeatability; the synthesized manganese-doped nanosheet fluorescent powder is not only uniform in morphology and size, but is also high in quantum efficiency and good in heat stability.

Description

technical field [0001] The invention belongs to the technical field of photoelectric luminescent materials, and more specifically relates to a preparation method of manganese-doped all-inorganic lead-chloride perovskite nanosheets. Background technique [0002] All-inorganic lead-containing perovskite nanocrystals have been widely explored for optoelectronic devices due to their excellent properties such as high fluorescent quantum dot efficiency and high carrier mobility. Doping perovskite nanocrystals can obtain new light-emitting windows and improve the stability of perovskite nanocrystals. Among them, manganese-doped all-inorganic lead-chloride perovskite, which converts low quantum efficiency blue light emission into high quantum efficiency orange light emission, is the most widely studied. [0003] At present, manganese-doped perovskite nanocrystals are mainly concentrated in cubic shapes with a size of about 10nm, which is outside the Bohr radius of 5nm of all-inorga...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 王静宣曈曈曹鲁豫黄俊健楼孙棋甘伟江
Owner SUN YAT SEN UNIV
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