Method for synthesizing cadmium selenide and quantum point with cadmium selenide cadmium sulfide nucleocapsid structure

Abstract

The method includes following steps: the cadmium oxide, cadmium carbonate, alkyl carboxylic acid, oleic acid, selenourea, thiourea are taken as raw material. Under the cover of oleic acid, or TOPO, or lauryl amine, or hexadecyl amine, or octadecyl amine, the alkyl carboxylic acid cadmium or the toluol solution of oleic acid cadmium reacts with aqueous solution of selenourea or thiourea at interface to form semiconductor nano-microparticles. Theses semiconductor nano-microparticles can implement wavelength tunable visible light under ultraviolet lamp.

Description

technical field [0001] The invention belongs to a method for synthesizing cadmium selenide and cadmium selenide / cadmium sulfide core-shell structure quantum dots. Background technique [0002] Nano-semiconductor materials have been a hot spot in material science research in the past two decades. Compared with traditional bulk semiconductor materials, nano-semiconductors can produce quantum size effects, so that people can control certain reaction conditions to prepare nanoparticles of different sizes. Light emission of different frequencies, so as to achieve the purpose of regulating the color of light emission. In addition, due to its nanoscale characteristics, nano-semiconductor materials are easy to compound with organic polymers or small molecule materials, and thin-film light-emitting devices can be prepared by methods such as spin coating. Nano-semiconductors of cadmium sulfide and cadmium selenide have very attractive application prospects in photoelectric conversion...

AI Technical Summary

Problems solved by technology

So far, many methods can be taken to synthesize cadmium selenide and cadmium selenide / cadmium sulfide core-shell quantum dots, which mainly include metal organic methods (J.Am.Chem.Soc.1993,115,8706; J.Phys. Chem.1996,100,468; J.Am.Chem.Soc.1997,119,7019) and its improved method (J.Am.Chem.Soc.2001,123,183; J.Phys.Chem.B 2003 , 107, 7454; J.Am.Chem.Soc.2003, 125, 12567; Synth.Met.2003, 139, 649), the synthesis conditions of organometallic chemistry methods are harsh, requiring anaerobic and anhydrous reaction operations, and the reaction The reagents used are highly toxic and expensive

Although the metal-organic alternative method uses less toxic reagents and is relatively cheap, it must also be completed under high temperature (200-300°C) and anhydrous and oxygen-free conditions.