A kind of synthesis method of tellurium-containing semiconductor nanocrystal

Abstract

The invention particularly relates to a synthesis method of tellurium-containing semiconductor nanocrystals. The chemical formula of the tellurium-containing semiconductor nanocrystal is shown as CdTexA1-x, wherein 0<x≤1, A is Se or S; the steps are as follows: preparation of the precursor; mixing the precursor to obtain a reaction solution; reacting the reaction solution for 1s-3h , cooling and precipitating to obtain the tellurium-containing semiconductor nanocrystal. Conventional, stable and low-toxic drugs are used in the synthesis process of the method, and the cost can be saved by more than 50%. The method is safe, easy to operate and has good repeatability. The synthesized Te-containing nanocrystals almost cover the visible-near-infrared light region; the size distribution is uniform, the fluorescence efficiency is high, the half-height width is narrow, and the photobleaching resistance is good; it has high application value in laboratory and industrial production .

Description

(1) Technical field [0001] The invention belongs to the technical field of synthesis of semiconductor nanocrystals, in particular to a synthesis method of tellurium-containing semiconductor nanocrystals. (2) Background technology [0002] Semiconductor nanoparticles, especially II-VI semiconductor nanoparticles are research hotspots in recent years. Semiconductor nanoparticles are also called semiconductor quantum dots (Quantum Dots, referred to as QDs). Because of their relatively small size, between a few to a dozen nanometers, they have many physical and chemical properties that bulk materials do not have, such as quantum size effect, dielectric confinement effect, surface effect, etc., so that it has broad application prospects in optoelectronic devices, solar cells, and laser biomarkers. In recent years, the research on semiconductor nanocrystals in the visible light-emitting region, especially the application as a biomarker, has attracted the attention of many scienti...

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Problems solved by technology

In 2000, Peng et al. discovered a relatively cheap, inorganic, and relatively less toxic method to synthesize nanocrystals, that is, cadmium oxide (CdO) was used instead of methyl cadmium (Cd(CH 3 ) 2 ) to synthesize nanocrystals such as CdTe, which further reduces the cost of synthesizing nanocrystals; however, Peng et al. and other groups have been using tributylphosphine (tributylphosphine, TBP) or trioctylphosphine (trioctylphosphine) when synthesizing tellurium precursors , TOP) dissolving tellurium as the precursor of tellurium, this method has application limitations because tributylphosphine or trioctylphosphine are toxic, flammable, explosive and relatively expensive drugs

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