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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 morphology and size are not very uniform, and the synthesis of all-inorganic perovskite nanosheets has not been reported. In contrast, all-inorganic Perovskite nanosheets are more stable than organic-inorganic hybrid perovskite nanosheets, and have broader application prospects

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

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

[0029] 2) Weigh 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 bottle;

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

[0031] 4) Continue to keep warm at 120°C for 10 minutes after pumping to completely dissolve the reactants;

[0032] 5) Heat up to 140°C, take 0.55g of the cesium precursor prepared in step 1) and quickly inject it into the reaction solution, and the colorless and transparent solution turns yellow quickly;

[0033] 6) After reacting for 150 minutes, the solution was placed in an ice bath and rapidly cooled to room tem...

Embodiment 2

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

Embodiment 3

[0038] Using the same process as in Example 1, the difference is that the time in step 6) of Example 1 is changed to 300min, 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.

Description

technical field [0001] The present invention relates to a kind of CsPbX 3 The invention discloses a method for preparing inorganic perovskite nanosheets, belonging to the field of new material preparation. Background technique [0002] With the advent of new perovskite solar cells, perovskite materials have attracted more and more attention. Among them, metal halide perovskite materials show excellent photoelectric performance, and their photoelectric conversion efficiency is high, which can reach more than 20%. , high carrier mobility, fast response, strong room temperature photoluminescence characteristics and nonlinear optical effects, in the fields of solar cells, photodetectors, optical sensors, light-emitting diodes, nonlinear optics / photoconductive elements, etc. It has quite broad application prospects, and its development value is very high. When organic-inorganic hybrid perovskite materials set off a wave of research, all-inorganic perovskite materials emerged in...

Claims

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Application Information

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IPC IPC(8): C01G21/16B82Y40/00
CPCC01G21/16C01P2002/01C01P2004/04C01P2006/60
Inventor 曾海波许蕾梦宋继中薛洁董宇辉李建海
Owner NANJING UNIV OF SCI & TECH
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