Inorganic perovskite CsPbX3 nanosheet synthesis method

A technology of nanosheets and inorganic calcium, which is applied in the field of preparation of CsPbX3 inorganic perovskite nanosheets, can solve the problems of uneven morphology and size of synthesis, and achieve the effects of good crystallinity, simple preparation process and low cost.

Active Publication Date: 2016-06-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Currently there are reports (LingY, YuanZ, TianY, et al.. Advanced Materials, 2016, 28 (2): 305-311.), (YuanZ, ShuY, TianY, etal. Chemical Communications, 2015, 51 (91): 16385-16388 .) Synthesized organic-inorganic hybrid perovskite nanosheets, but the synthesized morpho

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  • Inorganic perovskite CsPbX3 nanosheet synthesis method
  • Inorganic perovskite CsPbX3 nanosheet synthesis method
  • Inorganic perovskite CsPbX3 nanosheet synthesis method

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[0027] Example 1

[0028] 1) Dissolve 6mmol of Cs(st) in 40mL of octadecene, heat and stir to make it completely dissolved, and prepare the cesium precursor;

[0029] 2) Weigh out 0.198g of PbBr 2 , Dissolved in a mixed solution of 1.5mL oleic acid, 1mL oleylamine and 15mL octadecene, and put the mixed solution in a four-necked flask;

[0030] 3) The mixed solution is heated and stirred at 120°C, and repeatedly pumped and filled with argon, circulates 6-10 times to exhaust the oxygen and water in the reaction system, and ensure that the reaction system is protected by an inert atmosphere;

[0031] 4) After pumping, continue to keep at 120°C for 10 minutes to completely dissolve the reactants;

[0032] 5) The temperature is raised to 140°C, 0.55g of the cesium precursor prepared in step 1) is quickly injected into the reaction solution, and the colorless and transparent solution quickly turns yellow;

[0033] 6) After reacting for 150 minutes, place the solution in an ice bath and quickly...

Example Embodiment

[0035] Example 2

[0036] The same process as in Example 1 is used, except that the time in step 6) of Example 1 is changed to 60 min, and other conditions remain the same.

Example Embodiment

[0037] Example 3

[0038] The same process as in Example 1 is adopted, except that the time in step 6) of Example 1 is changed to 300 min, and other conditions remain the same.

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Abstract

The invention provides an inorganic metal halide perovskite nanosheet preparation method. Cesium lead halide CsPbX3 perovskite nanosheets are prepared by means of a high-temperature thermal injection method. According to the high-temperature thermal injection method for synthesis, a metal halide precursor in an oil system is in reaction under inertial gas shielding to produce metal halide perovskite nanosheets, and the size of the perovskite nanosheets is controlled by change of reaction temperature and time. The synthesized nanosheets have the advantages of shape uniformity, high light emitting efficiency, high stability, simplicity in synthesis and high development value.

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Claims

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Application Information

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Owner NANJING UNIV OF SCI & TECH
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