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

A core-shell structure, cadmium selenide technology, applied in chemical instruments and methods, sulfur compound, nanostructure manufacturing and other directions, can solve the problems of high price, harsh synthesis conditions, high toxicity of reagents, etc. The effect of short cycle times and mild reaction conditions

Inactive Publication Date: 2005-07-27
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Preparation of nanoparticle sol containing cadmium selenide:

[0010] Add 0.1134g (0.2mmol) cadmium tetradecyl carboxylate, 1.0ml oleic acid and 10ml toluene into the polytetrafluoroethylene lining of a 30ml autoclave and heat until it is colorless and transparent. After cooling to room temperature, add 10ml An aqueous solution containing 0.0124g (0.1mmol) of selenourea was added to the system, the autoclave was sealed and heated at 180°C for 0.25h. After cooling, green cadmium selenide quantum dots were formed in the oil phase. The fluorescence peak of its toluene solution at room temperature is around 443nm.

Embodiment 2

[0012] Preparation of nanoparticle sol containing cadmium selenide:

[0013] Add 0.1134g (0.2mmol) cadmium octadecyl carboxylate, 1g trioctylphosphine oxide and 10ml toluene into the polytetrafluoroethylene lining of a 30ml autoclave and heat until it is colorless and transparent. After cooling to room temperature, Add 10ml of an aqueous solution containing 0.0248g (0.2mmol) of selenourea into the system, seal the autoclave and put it in a furnace to heat at 120°C for 0.3h. After cooling, green cadmium selenide quantum dots are formed in the oil phase. The fluorescence peak of its toluene solution at room temperature is around 465nm.

Embodiment 3

[0015] Preparation of nanoparticle sol containing cadmium selenide:

[0016] Add 0.2268g (0.4mmol) cadmium tetradecyl carboxylate, 5.0ml oleic acid and 10ml toluene into the polytetrafluoroethylene lining of a 30ml autoclave and heat until it is colorless and transparent. After cooling to room temperature, add 10ml An aqueous solution containing 0.0124g (0.1mmol) of selenourea was added to the system, the autoclave was sealed and heated at 160°C for 0.4h. After cooling, yellow cadmium selenide quantum dots were formed in the oil phase. The fluorescence peak of its toluene solution at room temperature is around 474nm.

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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...

Claims

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Application Information

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IPC IPC(8): B82B3/00C01B17/00C01B21/00C01G11/00C09K11/08H01L21/00H01L31/18H01L33/00H01S5/00H05B33/12
CPCY02P70/50
Inventor 潘道成王强姬相玲蒋世春安立佳
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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