Method for preparing regular tetrahedral luminescent indium phosphide/zinc sulfide core-shell quantum dots

Abstract

The invention discloses a method for preparing tetrahedral light-emitting indium phosphide / zinc sulfide core-casing quantum dots. The method comprises the following steps: preparing high-boiling point tris(dialiphatic amido) phosphine, preparing InP quantum dot cores, preparing InP / ZnS core-casing quantum dots and separating the InP / ZnS core-casing quantum dots. Through the use of the high-boiling point tris(dialiphatic amido) phosphine as a phosphorus source, the price is low, the chemical structure is stable, the reaction is mild and safe, and gas is not produced. All reaction precursors are common chemical reagents and low in toxin and safe to store and use. The luminescent color of the InP / ZnS core-casing quantum dots can be precisely controlled simultaneously by the reaction temperature, the ratio of indium halide to the tris(dialiphatic amido) phosphine, the type of the halide and the reaction time, and high fluorescence quantum yield can be ensured.

Description

technical field [0001] The invention relates to a synthesis method of quantum dots, in particular to a chemical synthesis method of regular tetrahedral shape indium phosphide / zinc sulfide core-shell structure quantum dots. Background technique [0002] Due to the low toxicity of the material, indium phosphide quantum dots play an important role in basic research and industrial production such as biomarkers, quantum dot luminescence and display. So far, common chemical synthesis methods for indium phosphide quantum dots usually use tris(trimethylsilyl)phosphine, which is relatively expensive and difficult to store, as the phosphorus source, fatty acid indium as the indium source, and liquid olefin as the solvent at 200 -300 o Indium phosphide was prepared under the conditions of C. (see [0003] L. Li and P. Reiss, J. Am. Chem. Soc. 2008, 130, 11588-11589.) This method not only has high cost of raw materials, unstable raw materials, but also requires harsh reaction conditi...

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Problems solved by technology

[0003] L. Li and P. Reiss, J. Am. Chem. Soc. 2008, 130, 11588-11589.) This method not only has high cost of raw materials, unstable raw materials, but also requires harsh reaction conditions

Although the use of (tris(diethylamino)phosphine) as a phosphorus source to prepare indium phosphide quantum dots has been developed in recent years, which can greatly reduce the cost of synthesis and the conditions of the reaction; however, the generation of a large amount of gas during the reaction is not Conducive to the safety control of the reaction, and the controllable regulation of the reaction

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