Method for synthesizing tellurium-contained semiconductor nanocrystal

Abstract

The invention relates to a method for synthesizing tellurium-contained semiconductor nanocrystal. The chemical formula of the tellurium-contained semiconductor nanocrystal is shown as CdTexA, wherein x is more than 0 and less than or equal to 1 and A is Se or S; the method comprises the following steps of: preparing a former body; mixing the former body to obtain a reaction solution; leading the reaction solution to react for 1s-3h; and cooling and depositing to obtain the tellurium-contained semiconductor nanocrystal. During the synthesis process, the method uses normal and stable low-toxicity drugs, saves the cost by more than 50%, and has safe operation, easy operation and good repeatability. The fluorescence range of the tellurium-contained semiconductor nanocrystal almost covers from visible light to near infrared light area; and the tellurium-contained semiconductor nanocrystal has uniform dimension distribution, high fluorescence efficiency, narrow half-height width and good photobleaching resistance and has extremely 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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