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Synthesizing method of iodine-lead perovskite quantum dot

A technology of lead-iodine perovskite and synthesis method, applied in chemical instruments and methods, preparation of amino compounds from amines, nanotechnology, etc., to achieve high fluorescence quantum efficiency, simple operation, and easy large-scale application

Inactive Publication Date: 2019-03-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current synthetic method is highly dependent on lead iodide as a raw material, and the ratio of iodide ion / lead ion in the reaction system is only 2, which is far lower than the standard stoichiometric ratio of 3.

Method used

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  • Synthesizing method of iodine-lead perovskite quantum dot
  • Synthesizing method of iodine-lead perovskite quantum dot
  • Synthesizing method of iodine-lead perovskite quantum dot

Examples

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Effect test

Embodiment 1

[0021] Will Cs 2 CO 3 (analytical pure) and oleic acid (analytical pure) were mixed according to the stoichiometric ratio of 1:3, then 5 mL of octadecene (analytical pure) was added, nitrogen gas was introduced, and the mixture was heated to 120 ° C until the powder was completely dissolved and then cooled to room temperature. The concentration of Cs ions in the resulting solution was 5.0 mol / 42.5 mL. Mix PbO (analytical pure) and oleic acid in a stoichiometric ratio of 1:3, then add 5 mL of octadecene, blow in nitrogen, heat the mixture to 120 °C, and cool to room temperature until the powder is completely dissolved. The concentration of Pb ions in the obtained solution was 1.0 mol / L. After the above two solutions were preheated at 80°C, 0.4mL and 0.5mL were mixed with 0.4mL oleylamine and 5mL octadecene respectively, and the mixture was heated to 150°C, followed by rapid injection of 0.2mL iodotrimethylsilane, and the reaction After 5s, cool the device with an ice-water b...

Embodiment 2

[0024] Will Cs 2 CO 3 (analytical pure) and oleic acid (analytical pure) were mixed according to the stoichiometric ratio of 1:3, then 5 mL of octadecene (analytical pure) was added, nitrogen gas was introduced, and the mixture was heated to 120 ° C until the powder was completely dissolved and then cooled to room temperature. The concentration of Cs ions in the resulting solution was 5.0 mol / 42.5 mL. Mix PbO (analytical pure) and oleic acid in a stoichiometric ratio of 1:3, then add 5 mL of octadecene, blow in nitrogen, heat the mixture to 120 °C, and cool to room temperature until the powder is completely dissolved. The concentration of Pb ions in the obtained solution was 1.0 mol / L. After preheating the above two solutions at 80°C, mix 0.4mL and 0.5mL with 0.5mL oleylamine and 5mL octadecene respectively, heat the mixture to 150°C, then inject 0.2mL iodotrimethylsilane rapidly, and react After 5s, cool the device with an ice-water bath, and the resulting solution is CsPb...

Embodiment 3

[0026] Will Cs 2 CO 3 (analytical pure) and oleic acid (analytical pure) were mixed according to the stoichiometric ratio of 1:2, then 5 mL of octadecene (analytical pure) was added, nitrogen gas was introduced, and the mixture was heated to 120 °C until the powder was completely dissolved and then cooled to room temperature. The concentration of Cs ions in the resulting solution was 5.0 mol / 42.5 mL. Mix PbO (analytical pure) and oleic acid in a stoichiometric ratio of 1:2, then add 5 mL of octadecene, blow in nitrogen, heat the mixture to 120 °C, and cool to room temperature until the powder is completely dissolved. The concentration of Pb ions in the obtained solution was 1.0 mol / L. After the above two solutions were preheated at 80°C, 0.4mL and 0.5mL were mixed with 0.4mL oleylamine and 5mL octadecene respectively, and the mixture was heated to 150°C, followed by rapid injection of 0.2mL iodotrimethylsilane, and the reaction After 5s, cool the device with an ice-water ba...

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Abstract

A synthesizing method of an iodine-lead perovskite quantum dot relates to quantum dot synthesis. The synthesizing method of the iodine-lead perovskite quantum dot comprises mixing at least one of Cs2CO3, methylamine and formamidine acetate with oleic acid and octadecene according to a stoichiometric ratio, inletting nitrogen into the mixture, increasing the temperature and then cooling down the mixture to room temperature; mixing PbO with oleic acid and octadecene according to a stoichiometric ratio, inletting in nitrogen and increasing the temperature until the PbO power is fully dissolved, and then cooling the solution down to room temperature; preheating and then mixing the solution with oleic oil and octadecene solution, increasing the temperature of the mixed solution to 50-300 DEG C,then adding in trimethyliodosilane for reaction, cooling a reacting device in ice-water bath to obtain a solution, namely, the iodine-lead perovskite quantum dot. The prepared iodine-lead perovskitequantum dot is high in fluorescence quantum efficiency and stability and accordingly is beneficial to display and lighting application in the future. The synthesizing method of the iodine-lead perovskite quantum dot is simple in operation and raw material acquisition and applicable to large-scale promotion and application.

Description

technical field [0001] The invention relates to the synthesis of quantum dots, in particular to a synthesis method of lead iodine perovskite quantum dots. Background technique [0002] In recent years, lead halide perovskite quantum dots have attracted much attention due to their high fluorescence quantum efficiency, high color purity, and tunable emission color over the entire visible range. Compared with traditional cadmium-based chalcogenide quantum dots, lead halide perovskite quantum dots also have low preparation temperature and high defect tolerance. These excellent properties enable lead halide perovskite quantum dots to be used in many fields, such as light-emitting diodes, lasers, photodetectors, and photocatalysis. However, their practical applications are greatly limited by poor chemical and structural stability (ACS Energy Lett., 2017, 2(9), 2071–2083). In particular, red fluorescent lead iodine perovskite quantum dots, in addition to being sensitive to light,...

Claims

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Application Information

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IPC IPC(8): C09K11/66C07C211/04C07C209/68C09K11/06B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C07C209/68C07C211/04C09K11/06C09K11/665
Inventor 解荣军蔡宇廷李烨
Owner XIAMEN UNIV
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