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Method for synthesizing inorganic perovskite nanowires

A synthesis method and nanowire technology, applied in inorganic chemistry, chemical instruments and methods, lead compounds, etc., can solve the problems of low yield of nanowire method, high cost of high temperature treatment process, complexity of experimental process, etc., and achieve uniform morphology. , the effect of low reaction temperature and high yield

Active Publication Date: 2018-09-07
HEBEI UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention aims at preparing perovskite CsPbX at present 3 The shortcomings of the nanowire method, such as the low yield, the complexity of the experimental process, the high-temperature processing process, and the high cost, provide an inorganic perovskite CsPbX 3 Synthesis of (X=Cl, Br, I) Nanowires

Method used

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  • Method for synthesizing inorganic perovskite nanowires
  • Method for synthesizing inorganic perovskite nanowires
  • Method for synthesizing inorganic perovskite nanowires

Examples

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Embodiment 1

[0045] Step 1, take by weighing 0.7mmol cesium carbonate (Cs 2 CO 3 ) into a flask containing 1.0 mL of oleic acid and 8.0 mL of octadecene, stirred at 120° C. for 25 min to completely dissolve the cesium carbonate powder, and then naturally cooled to room temperature to form a cesium precursor solution.

[0046] Step 2. Weigh 2.0mmol of lead bromide into a flask containing 2.0mL of oleic acid, 2.0mL of oleylamine and 16mL of octadecene, stir at 110°C for 25min to completely dissolve the lead bromide powder, and then cool in an ice-water bath to room temperature to form a lead bromide precursor solution.

[0047] Step 3. Heat the cesium oleate precursor solution obtained in step 1 to 80°C, measure 2mL and add it to the reaction kettle, cool to room temperature, then add 20mL lead bromide precursor obtained in step 2 at room temperature, and sonicate 15min.

[0048] Step 4. React the mixed solution obtained in Step 3 at a heating temperature of 120° C. for 70 h, and naturall...

Embodiment 2

[0053] Step 1. Weigh 0.7 mmol of cesium carbonate and add it to a flask containing 1.0 mL of oleic acid and 8.0 mL of octadecene, stir at 120°C for 25 minutes to completely dissolve the cesium carbonate powder, then cool naturally to room temperature to form a cesium precursor body solution.

[0054] Step 2. Weigh 2.0mmol of lead bromide into a flask containing 2.0mL of oleic acid, 2.0mL of oleylamine and 16mL of octadecene, stir at 110°C for 25min to completely dissolve the lead bromide powder, and then cool in an ice-water bath to room temperature to form a lead bromide precursor solution.

[0055] Step 3. Weigh 2.0mmol lead iodide and add it to a flask containing 2.0mL oleic acid, 2.0mL oleylamine and 16mL octadecene, stir at 110°C for 25min to completely dissolve the lead iodide powder, and then use an ice-water bath to cool to room temperature to form a lead iodide precursor solution.

[0056] Step 4. Heat the cesium oleate precursor solution obtained in step 1 to 80°C ...

Embodiment 3

[0063] Step 1. Weigh 0.7 mmol of cesium carbonate and add it to a flask containing 1.0 mL of oleic acid and 8.0 mL of octadecene, stir at 120°C for 25 minutes to completely dissolve the cesium carbonate powder, then cool naturally to room temperature to form a cesium precursor body solution.

[0064] Step 2. Weigh 2.0mmol of lead bromide into a flask containing 2.0mL of oleic acid, 2.0mL of oleylamine and 16mL of octadecene, stir at 110°C for 25min to completely dissolve the lead bromide powder, and then cool in an ice-water bath to room temperature to form a lead bromide precursor solution.

[0065] Step 3. Weigh 2.0mmol lead chloride and add it to a flask containing 2.0mL oleic acid, 2.0mL oleylamine, 2.0mL trioctylphosphine and 16mL octadecene, stir at 110°C for 25min to make the lead chloride powder completely dissolved, and then cooled to room temperature using an ice-water bath to form a lead chloride precursor solution.

[0066] Step 4. Heat the cesium oleate precurso...

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Abstract

The invention discloses a method for synthesizing inorganic perovskite nanowires. According to the method, a CsPbBr3 nanowire which has a length of several millimeters, a diameter of only about 10 nmand an ultrahigh draw ratio is prepared at a low temperature by utilizing a solvothermal method and an anion exchange method, and nanowires CsPbI3 and CsPbCl3 are obtained by virtue of a simple anionexchange process. The method has a great effect of promoting industrial large-scale preparation of inorganic perovskite nanowires and is expected to further realize application in various aspects suchas photoelectric detection, laser and solar cells and the like. The method disclosed by the invention is simple, controllable, high in yield, uniform in morphology, low in reaction temperature and suitable for large-scale production.

Description

technical field [0001] The invention relates to a method for synthesizing inorganic perovskite nanowires, specifically CsPbX with a super high aspect ratio 3 The invention discloses a method for synthesizing (X=Cl, Br, I) nanowires, belonging to the fields of new material preparation and nanotechnology. Background technique [0002] Inorganic perovskite CsPbX 3 (X=Cl, Br, I) nanocrystals are used in light-emitting diodes, solar cells, etc. And photoelectric detection and other fields have a wide range of applications. Among them, one-dimensional inorganic perovskite nanowires have great application prospects in both solar cells and photoelectric detection due to their unique structural characteristics, such as excellent optical conductivity and good lateral conductivity. The synthesis method of titanium ore nanowires has become the research direction of many scientific researchers. Preparation of inorganic perovskite CsPbX 3 The synthesis methods of nanowires mainly inc...

Claims

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Application Information

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IPC IPC(8): C01G21/00C09K11/66
CPCC01G21/006C01P2004/16C01P2004/60C01P2004/64C09K11/66
Inventor 林靖翟伟黄阳何鑫唐成春
Owner HEBEI UNIV OF TECH
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