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A mn-doped cspb 2 br 5 Preparation method of bulk crystal

A crystal and bulk technology, applied in the application field of nanomaterials, can solve problems such as limited, achieve the effect of simple method, consistent lattice phase, and easy to promote

Active Publication Date: 2021-12-21
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are very limited reports on the B-site ion doping of perovskite crystals.

Method used

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  • A mn-doped cspb <sub>2</sub> br <sub>5</sub> Preparation method of bulk crystal
  • A mn-doped cspb <sub>2</sub> br <sub>5</sub> Preparation method of bulk crystal
  • A mn-doped cspb <sub>2</sub> br <sub>5</sub> Preparation method of bulk crystal

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Experimental program
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Embodiment

[0032] doped MnBr 2 CsPb 2 Br 5 The preparation of crystal (feeding molar ratio MnBr 2 4H 2 O:PbBr 2 =1:1):

[0033] (1) Preparation of CsBr precursor solution: ensure that the glass bottle is clean, weigh 0.064g of CsBr, and put it into the glass bottle; then add 2mL of HBr into the bottle with a pipette gun, and place the glass bottle in a magnetic stirrer Heating to 90°C to obtain a clear CsBr precursor solution;

[0034] (2)MnBr 2 and PbBr 2 Preparation of mixed precursor solution: ensure that the glass bottle is clean, weigh 0.221g of PbBr 2 and 0.172 g of MnBr 2 4H 2 O was placed in a glass vial; then 3 mL of HBr was added to the vial with a pipette gun, and the vial was placed in a magnetic stirrer and heated to 90°C to obtain clear MnBr 2 and PbBr 2 mixed precursor solution;

[0035] (3) MnBr obtained from step (2) 2 and PbBr 2 The mixed precursor solution was kept at 90 °C, and then the CsBr precursor solution obtained in step (1) was dropped into the M...

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Abstract

The invention discloses a Mn-doped CsPb 2 Br 5 The preparation method of bulk crystal comprises the following steps: (1) adding CsBr powder into HBr solution, heating and stirring to make it dissolve completely, so as to obtain CsBr precursor solution; (2) adding PbBr 2 Powder and MnBr 2 4H 2 O powder was added to the HBr solution, heated and stirred to dissolve completely, and MnBr 2 and PbBr 2 Mixing precursor solution; (3) the CsBr precursor solution of step (1) gained is added to the MnBr of step (2) gained 2 and PbBr 2 Mixing the precursor solution to obtain a mixed solution; (4) cooling the mixed solution obtained in step (3) to room temperature to finally obtain precipitated crystals. The present invention grows out stable, thinner Mn-doped CsPb from concentrated hydrobromic acid by liquid phase method 2 Br 5 blocky crystals.

Description

technical field [0001] The invention relates to a Mn-doped CsPb 2 Br 5 The invention relates to a method for preparing block crystals, which belongs to the application field of nanometer materials. Background technique [0002] Inorganic perovskite crystal materials are expected to achieve better results when applied to optoelectronic devices due to their advantages such as wider absorption spectrum, higher carrier mobility, longer carrier lifetime and higher stability. The excellent optoelectronic device performance makes crystalline perovskite materials expected to achieve more excellent optoelectronic device performance in optoelectronic devices. In addition, the extremely low defect density of perovskite crystals provides an ideal material platform for studying its intrinsic physical properties and developing novel devices. However, the toxicity of lead is considered to be the biggest problem causing environmental pollution. Substituting Pb in the crystal structure b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B7/10C09K11/66
CPCC30B29/12C30B7/10C09K11/665
Inventor 王春雷李想徐淑宏崔一平
Owner SOUTHEAST UNIV