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1D dmapbi 3 Growth methods of large single crystals

A growth method, single crystal technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve problems such as limited applications

Active Publication Date: 2022-07-05
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Limit the application of this material in photoelectric conversion

Method used

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  • 1D dmapbi <sub>3</sub> Growth methods of large single crystals
  • 1D dmapbi <sub>3</sub> Growth methods of large single crystals
  • 1D dmapbi <sub>3</sub> Growth methods of large single crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 21 mg of chemically pure benzylamine and 461 mg of chemically pure PbI 2 Stir and dissolve in 9.44g of chemically pure DMF to form a clear yellow solution, then drop 14.91g of hydroiodic acid solution (HI mass concentration of 57%) into the solution, 8g of phosphorous acid aqueous solution (phosphorous acid mass concentration of 50%) %) was added dropwise to the solution to stabilize hydriodic acid. The resulting solution was a clear yellow solution. The solution was heated on a heating table at 60°C for about 5-24 hours to volatilize the liquid and decompose dimethylamine to obtain DMAPbI 3 Saturate the solution, then evaporate the solvent from the resulting solution at room temperature, and grow a large yellow single crystal within 10-30 days.

[0018] The following table is the DMAPbI in this example 3 Saturated solution produces yellow single crystal size after different time:

[0019]

[0020] The table above states that, between 5-10 days, DMAPbI 3 The siz...

Embodiment 2

[0022] 107 mg of chemically pure benzylamine and 461 mg of chemically pure PbI 2 Stir and dissolve in 4.7g of chemically pure DMF to form a clear yellow solution, then drop 7.38g of hydroiodic acid solution (HI mass concentration of 57%) into the solution, 4g of phosphorous acid aqueous solution (phosphorous acid mass concentration of 50%) %) was added dropwise to the solution to stabilize hydriodic acid. The resulting solution was a clear yellow solution. The solution was heated on a heating table at 65°C to volatilize the liquid and decompose the dimethylamine to obtain DMAPbI 3 Saturate the solution, then evaporate the solvent from the resulting solution at room temperature, and grow a large yellow single crystal within 10-30 days.

Embodiment 3

[0024] 60 mg of chemically pure benzylamine and 461 mg of chemically pure PbI 2 Stir and dissolve in 7.07g of chemically pure DMF to form a clear yellow solution, then drop 11.14g of hydroiodic acid solution (HI mass concentration of 57%) into the solution, 6g of phosphorous acid aqueous solution (phosphorous acid mass concentration of 50%) %) was added dropwise to the solution to stabilize hydriodic acid. The resulting solution was a clear yellow solution. The solution was heated on a heating table at 55°C to volatilize the liquid and decompose dimethylamine to obtain DMAPbI 3 Saturate the solution, then evaporate the solvent from the resulting solution at room temperature, and grow a large yellow single crystal within 10-30 days.

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Abstract

The invention relates to a one-dimensional DMAPbI in the field of organic-inorganic hybrid perovskite crystal materials 3 A method for growing a large single crystal, the method includes the following steps: 1) combining benzylamine and PbI 2 Stir and dissolve in DMF to form a clear yellow solution; 2) Drop the hydroiodic acid solution into the solution, and then dropwise add aqueous phosphorous acid to stabilize the hydroiodic acid, and the resulting solution is a clear yellow solution; 3) Put the obtained The yellow solution was heated at 55-65°C to volatilize the liquid, DMF was decomposed to obtain dimethylamine, and DMAPbI was obtained 3 Saturated solution; 4) The obtained solution was evaporated at room temperature, and a large yellow single crystal was grown after 10-30 days. The invention grows one-dimensional DMAPbI with a size of 2 mm × 4 mm × 8 mm through an improved solution method 3 Large single crystals, which can be used as optoelectronic materials, can be well applied in the field of photoelectric conversion.

Description

technical field [0001] The invention relates to a perovskite crystal, in particular to the technical field of preparation of organic-inorganic hybrid perovskite crystal materials. Background technique [0002] In the prior art, organic-inorganic hybrid perovskites have received extensive attention due to their excellent photoelectric effect. Among them, methylamine lead iodine (MAPbI 3 ) as the representative of the three-dimensional organic-inorganic hybrid perovskite solar cells with a photoelectric efficiency of 22%, which is comparable to that of silicon solar cells. One-dimensional organic-inorganic hybrid perovskites have attracted much attention due to their good moisture tolerance and excellent optoelectronic properties. In one-dimensional chain compounds, one-dimensional inorganic chains are separated by organic ions to form a quantum wire structure. In such quantum wires, the charge carriers are confined in a one-dimensional inorganic framework. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B7/02
CPCC30B29/54C30B7/02Y02P70/50
Inventor 高凯歌王一鸣
Owner YANGZHOU UNIV
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