Preparation method of 2-hexyldecanoic acid modified all-inorganic perovskite quantum dot material

A technology of quantum dot material and base decanoic acid, applied in inorganic chemistry, chemical instruments and methods, lead compounds, etc., can solve the problems affecting the luminescence stability, poor stability, and agglomeration of quantum dots, and achieve improved stability. and its optical properties, the effect of improving dispersion and stability, and increasing composite properties

Active Publication Date: 2019-01-29
北京京通光能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The disadvantage of poor stability in environments such as light, heat, air, and moisture has restricted the practical application of all-inorganic perovskite quantum dots.
In recent years, the poor stability of all-inorganic perovskite quantum dot materials has also attracted extensive attention from researchers. 3 For example, there are currently many methods to improve its stability, such as ion doping, core-shell structure, surface passivation, surface coating, post-treatment, ligand modification, etc. These methods are relatively effective at present, and each There are advantages and disadvantages, however, there is no result to greatly improve its stability
[0003] At present, the

Method used

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  • Preparation method of 2-hexyldecanoic acid modified all-inorganic perovskite quantum dot material
  • Preparation method of 2-hexyldecanoic acid modified all-inorganic perovskite quantum dot material
  • Preparation method of 2-hexyldecanoic acid modified all-inorganic perovskite quantum dot material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] (1) Preparation of cesium 2-hexyldecanoate precursor solution: add 0.5mmol of cesium hydroxide CsOH, 4mL of octadecene (ODE) and 0.5mL of 2-hexyldecanoic acid (DA) into a 100mL three-necked flask, The three-necked flask was evacuated to vacuum and placed on a heating mantle magnetic stirrer for magnetic stirring. After stirring for 20 minutes, it was heated to 120°C for reaction until the cesium hydroxide was completely dissolved into cesium 2-hexyldecanoate precursor for use. The whole reaction During the process, the three-necked flask has been kept in a vacuum state and continuously magnetically stirred;

[0028] (2) Preparation of lead chloride precursor: 0.188mmol of lead chloride PbCl 2 , 5mL of octadecene (ODE), 0.5mL of 2-hexyldecanoic acid (DA) and 0.5mL of oleylamine (OLA) were added to an empty 100mL three-necked flask, the three-necked flask was evacuated and put Perform magnetic stirring on the heating mantle magnetic stirrer. After stirring ...

Example Embodiment

[0031] Example 2

[0032] (1) Preparation of cesium 2-hexyldecanoate precursor solution: 0.25mmol of cesium carbonate Cs 2 CO 3 , 4mL of octadecene (ODE) and 0.5mL of 2-hexyldecanoic acid (DA) were added to a 100mL three-necked flask, the three-necked flask was evacuated and placed on a heating mantle magnetic stirrer for magnetic stirring, stirring for 20min Then start to heat to 120°C for the reaction, until the cesium carbonate is completely dissolved into the cesium 2-hexyldecanoate precursor solution for later use. The three-neck flask has been kept in a vacuum state during the whole reaction process and magnetic stirring is continued;

[0033] (2) Preparation of lead bromide precursor solution: 0.188mmol of lead chloride PbBr 2 , 5mL of octadecene (ODE), 0.5mL of 2-hexyldecanoic acid (DA) and 0.5mL of oleylamine (OLA) were added to an empty 100mL three-necked flask, the three-necked flask was evacuated and put Perform magnetic stirring on the heating mantle magnetic stirrer. ...

Example Embodiment

[0036] Example 3

[0037] (1) Preparation of cesium 2-hexyldecanoate precursor: add 0.5mmol of cesium acetate CH 3 COOCs, 4 mL of octadecene (ODE) and 0.5 mL of 2-hexyl decanoic acid (DA) were added to a 100 mL three-necked flask. The three-necked flask was evacuated to vacuum and placed on a heating mantle magnetic stirrer for magnetic stirring. After 20 minutes, start heating to 120°C for the reaction until the cesium acetate is completely dissolved into cesium 2-hexyldecanoate precursor for use. The three-necked flask has been kept in a vacuum state during the whole reaction and magnetic stirring is continued;

[0038] (2) Preparation of lead iodide precursor solution: 0.18mmol of lead iodide PbI 2 , 5mL of octadecene (ODE), 0.5mL of 2-hexyldecanoic acid and 0.5mL of oleylamine (OLA) were added to an empty 100mL three-necked flask, the three-necked flask was evacuated and placed in a heating mantle Perform magnetic stirring on a magnetic stirrer. After stirring for 20 minutes, s...

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Abstract

The invention discloses a preparation method of a 2-hexyldecanoic acid modified all-inorganic perovskite quantum dot material. The 2-hexyldecanoic acid modified calcium-titanium quantum dot material with high stability, good dispersity and excellent optical properties is prepared by the following steps: modifying a perovskite quantum dot material through 2-hexyldecanoic acid, preparing a cesium 2-hexyldecanoate precursor solution, preparing a lead halide precursor solution, preparing a reaction stock solution of the perovskite quantum dot material, and purifying the 2-hexyldecanoic acid modified perovskite quantum dot material. According to the invention, binding energy between branched chains and the perovskite quantum dot material is improved by utilizing shorter branched chains in the 2-hexyldecanoic acid, so that dispersity and stability of the perovskite quantum dot material are improved. Meanwhile, the shorter branched chains in the 2-hexyldecanoic acid are also beneficial to recombination of electrons and holes in the perovskite quantum dot material, and stability and optical characteristics of the perovskite quantum dot material are further improved.

Description

technical field [0001] The invention belongs to the technical field of synthesis of all-inorganic perovskite quantum dots, and in particular relates to a preparation method of an all-inorganic perovskite quantum dot material modified by 2-hexyldecanoic acid. Background technique [0002] The disadvantage of poor stability in environments such as light, heat, air, and moisture has always restricted the practical application of all-inorganic perovskite quantum dots. In recent years, the poor stability of all-inorganic perovskite quantum dot materials has also attracted extensive attention from researchers. 3 For example, there are currently many methods to improve its stability, such as ion doping, core-shell structure, surface passivation, surface coating, post-treatment, ligand modification, etc. These methods are relatively effective at present, and each There are advantages and disadvantages, however, there is no result to greatly improve its stability. [0003] At prese...

Claims

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Application Information

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IPC IPC(8): C01G21/00B82Y40/00
CPCB82Y40/00C01G21/006C01P2002/34C01P2002/72C01P2002/84C01P2004/01C01P2004/64C01P2006/60
Inventor 臧志刚鄢冬冬王明
Owner 北京京通光能科技有限公司
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