Method for synthesizing copper-based perovskite powder by low-temperature solvent method

A solvent method and perovskite technology, applied in chemical instruments and methods, copper compounds, inorganic chemistry, etc., can solve the problems of lack of powder synthesis process, etc., and achieve low cost of growth equipment, short manufacturing cycle, and few process steps Effect

Inactive Publication Date: 2021-01-29
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For current Cs 3 Cu 2 x 5 The powder synthesis process is missing, and the present invention proposes a low-temperature solvent method to synthesize copper-based perovskite Cs 3 Cu 2 x 5 powder method

Method used

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  • Method for synthesizing copper-based perovskite powder by low-temperature solvent method
  • Method for synthesizing copper-based perovskite powder by low-temperature solvent method
  • Method for synthesizing copper-based perovskite powder by low-temperature solvent method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]All inorganic copper-based perovskite powder Cs3Cu2I5Preparation method and steps

[0026]Step 1: Weigh 15.558g (ie 0.06mol) of cesium iodide (99.5%) and 7.618g (ie, 0.04mol) of copper iodide (98%), and put the two drugs into a 250ml beaker.

[0027]Step 2: First transfer 16ml of N,N-dimethylformamide to a 250ml beaker with a pipette, and then transfer 4ml of dimethylsulfoxide to a 250ml beaker (ie DMF:DMSO=4:1 ).

[0028]Step 3: Put the stirring rotor into the above-mentioned 250m beaker and seal it with a parafilm.

[0029]Step 4: Place the beaker on a magnetic stirrer and stir for 5 hours at a constant temperature at a temperature of 60 degrees Celsius and a rotation speed of 750 r / s to fully dissolve and react the medicine.

[0030]Step 5: Take a clean 100ml beaker and filter the precipitated powder in the solution with qualitative filter paper.

[0031]Step 6: Dry the filtered powder, grind it thoroughly with a grinder, take a small amount of powder for XRD detection, and store the remaini...

Embodiment 2

[0037] All inorganic copper-based perovskite powder Cs 3 Cu 2 Br 5 Preparation method and steps:

[0038] The other steps are the same as in Example 1, except that cesium iodide is replaced with cesium bromide; the solvents N,N-dimethylformamide and dimethylsulfoxide are replaced with separate N,N-dimethylformamide . The obtained product powder has good luminescence properties.

Embodiment 3

[0040] All inorganic copper-based perovskite powder Cs 3 Cu 2 Cl 5 Preparation methods and steps.

[0041] The other steps are the same as in Example 1, except that cesium iodide is replaced with cesium chloride; the solvents N,N-dimethylformamide and dimethyl sulfoxide are replaced with separate γ-butyrolactone. The resulting product has good light-emitting properties.

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Abstract

The invention relates to a method for synthesizing copper-based perovskite powder by a low-temperature solvent method. The method comprises the following steps: adding CsX and CuX into a polar organicmixed solution, and stirring for 4-6 hours at 40-70 DEG C, wherein the polar organic mixed solution is a mixed solution of N, N-dimethylformamide (DMF)and dimethyl sulfoxide (DMSO), the CsX is cesiumchloride, cesium bromide or cesium iodide, and the CuX is copper chloride, copper bromide or copper iodide. According to the synthesis process, constant-temperature growth on a hot plate is not needed, synthesis is directly conducted on a magnetic stirrer, the synthesis process has the advantages of being short in manufacturing period, low in cost, simple in growth step, environmentally friendlyand the like, and Cs3Cu2X5 powder with high crystallization quality is separated out within 5 hours.

Description

Technical field[0001]The invention belongs to the field of new material preparation, and specifically relates to a low-temperature solvent synthesis method of lead-free perovskite powder with a copper base instead of a lead base.Background technique[0002]In recent years, lead-based perovskite materials have shown excellent performance in photoelectric conversion and have received widespread attention! Lead-based perovskite materials not only have excellent optical properties, such as adjustable emission spectra, narrow luminescence peaks, and low defect state density. Lead-based perovskites also have many advantages such as low manufacturing costs and simple production processes. However, the inherent crystal structure of lead-based perovskite materials is unstable, and it is prone to phase transition decomposition at room temperature, which easily causes the leakage of heavy metal lead ions in the compound. The defects of easy decomposition of materials and unfriendly environment s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61C01G3/00
CPCC09K11/616C01G3/006C01P2004/03C01P2002/72C01P2006/60
Inventor 胡章贵韩美娜王迪
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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