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EuCl3-assisted growth method of Cs3Cu2X5 perovskite single crystal

A growth method, perovskite technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problem of low luminous efficiency of single crystal

Inactive Publication Date: 2021-09-10
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature solvent method has lower luminous efficiency than single crystals synthesized by other growth methods.

Method used

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  • EuCl3-assisted growth method of Cs3Cu2X5 perovskite single crystal
  • EuCl3-assisted growth method of Cs3Cu2X5 perovskite single crystal
  • EuCl3-assisted growth method of Cs3Cu2X5 perovskite single crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] All-inorganic copper-based perovskite crystal Cs 3 Cu 2 I 5 Preparation method and steps

[0040] Step 1: weigh the cesium iodide (99.5%) of 7.779g (i.e. 0.03mol), the copper iodide (98%) of 3.809g (i.e. 0.02mol), put two kinds of medicines in 3. in 100ml beaker, again Weigh 0.0194g of EuCl 3 Put it into a beaker ③.

[0041] Step 2: First transfer 7.5ml of N,N-dimethylformamide to the beaker ③ with a pipette gun, and then transfer 2.5ml of dimethyl sulfoxide to the beaker ③ (ie DMF:DMSO=3: 1) Finally, add 2ml of methyl acetate (MAC) to the beaker ③, place the beaker ③ on a magnetic stirrer at 70 degrees Celsius and stir for 6 hours to fully dissolve and react the medicine.

[0042] Step 3: Take a clean 100ml beaker ④, and filter the powder in the beaker ③ with qualitative filter paper.

[0043] Step 4: Seal the beaker ④ containing the filtered clear, transparent orange-yellow saturated solution with parafilm, and continue to grow at a constant temperature of 65°C ...

Embodiment 2

[0050] All-inorganic copper-based perovskite crystal Cs 3 Cu 2 Br 5 Preparation method and steps:

[0051] Other steps are the same as in Example 1, except that cesium iodide is replaced by cesium bromide; solvent N,N-dimethylformamide, dimethyl sulfoxide are replaced by N,N-dimethylformamide and methyl acetate. The obtained product crystal has good luminescence performance.

Embodiment 3

[0053] All-inorganic copper-based perovskite crystal Cs 3 Cu 2 Cl 5 Preparation methods and steps.

[0054] Other steps are the same as in Example 1, except that cesium iodide is replaced by cesium chloride; solvent N,N-dimethylformamide, dimethyl sulfoxide and methyl acetate are replaced by gamma-butyrolactone and acetic acid methyl ester. The obtained crystal has good luminescence performance.

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Abstract

The invention relates to an EuCl3-assisted growth method of a Cs3Cu2X5 perovskite single crystal. According to the method, CuX and CsX serve as raw materials, an organic mixed solution composed of methylformamide, dimethyl sulfoxide and methyl acetate serves as a crystal synthesis environment, EuCl3 is added at the temperature lower than 70 DEG C to assist growth, and high-quality Cs3Cu2X5 which is square in shape and remarkably improved in quantum efficiency is separated out. The Cs3Cu2X5 crystal grows on a hot plate at a constant temperature, has the characteristics of good crystal luminescence property, short manufacturing period, low cost, simple growth process, environmental friendliness and the like, and can be separated out within 24 hours.

Description

technical field [0001] The invention belongs to the field of new material preparation, in particular to EuCl 3 Auxiliary Cs 3 Cu 2 I 5 Low-temperature solvent synthesis of perovskite single crystals. Background technique [0002] Perovskite materials have shown excellent performance in photoelectric conversion, which has attracted the attention of researchers. Lead-based perovskite has superior optical properties, such as controllable emission spectrum, narrow luminescence peak, low defect density, low cost and simple growth process. However, the instability and environmental unfriendliness limit the application of lead-based perovskites. However, the all-inorganic copper-based perovskite Cs 3 Cu 2 I 5 The chemical properties are more stable, the luminous efficiency is high, and the cost of growth is low, so it is an ideal semiconductor material. Therefore, the development of highly stable and environmentally friendly lead-free perovskite materials has huge research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/14C30B29/12
CPCC30B7/14C30B29/12
Inventor 胡章贵韩美娜
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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