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Method for preparing nano fine particles of cadmium selenide

A nanoparticle, cadmium selenide technology, applied in chemical instruments and methods, binary selenium/tellurium compounds, cadmium compounds, etc., can solve problems such as volatile, affecting the final performance of devices, and explosive, so as to achieve non-volatile, guaranteed Effects of crystal quality and surface properties

Inactive Publication Date: 2005-03-30
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that dimethyl cadmium is highly toxic, and has the disadvantages of being volatile, flammable, and explosive.
Its advantages are: these new cadmium sources are non-toxic, stable and low in cost, but organic carboxylic acid must be introduced in the reaction process, and the temperature will be raised to a high temperature of nearly 300 ° C, which will be used in the nano-semiconductor light-emitting device. New impurities will be introduced during the preparation, which may affect the final performance of the device

Method used

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  • Method for preparing nano fine particles of cadmium selenide
  • Method for preparing nano fine particles of cadmium selenide
  • Method for preparing nano fine particles of cadmium selenide

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Preparation of CdSe nanoparticles with cadmium alkoxide as the cadmium source for the reaction:

[0025] 200mg of selenium powder was dissolved in 10ml of trioctyl phosphine (TOP) to make precursor mixture I for subsequent use. Mix 50mg of cadmium dimethoxide and 5g of TOPO into the reaction bottle, wash with nitrogen three times, then vacuumize and raise the temperature to 100°C and stir, a slightly yellow and transparent solution can be seen, then raise the temperature to 200°C and keep the temperature for 30 minutes, then stop vacuuming , under nitrogen protection, inject 1ml of precursor mixture I, the molar ratio of cadmium to selenium is 1.1:1, after 20 minutes of reaction, a deep red clear CdSe nanoparticle colloidal solution is generated.

Embodiment 2

[0027] Preparation of CdSe nanoparticles with cadmium alkoxide as the cadmium source for the reaction:

[0028] Mix 50mg of cadmium dimethoxide with 4g of TOPO and 0.5g of hexadecylamine (HDA) into the reaction flask, wash it with nitrogen three times, then vacuumize it and raise the temperature to 100°C for stirring. A slightly yellow and transparent solution can be seen, and then heat up to Keep the temperature at 180°C for 30 minutes, stop vacuuming, protect with nitrogen, inject 1ml of precursor mixture I and react for 20 minutes to generate a bright red and clear CdSe nanoparticle colloid solution.

Embodiment 3

[0030] Preparation of CdSe nanoparticles with cadmium alkoxide as the cadmium source for the reaction:

[0031] Mix 65mg of cadmium diisopropoxide and 4g of TOPO into the reaction bottle, wash with nitrogen three times, vacuumize and heat up to 100°C and stir, a slightly yellow and transparent solution can be seen, then heat up to 200°C and keep the temperature for 30 minutes, stop pumping Vacuum, nitrogen protection, after heating up to 240 ° C constant temperature, inject 1ml of precursor mixture I and react for 20 minutes to generate a dark red CdSe nano particle colloid solution.

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Abstract

In the invention, alkoxylcadimium used as reacting cadmium source and trioctyl phosphine oxide are formed ligand solution in temp, 100 deg.C, then reacted with selenium single-compound solution in proper temp. to create crystal nucleus of cadimium selenide, or alkoxylcadimium is direct mixed with selenium single-compound and dissolved normal-butyl phosphorus to form single precursor, further to create crystal nucleus of cadimium selenide, finally to produce cadimium selenide nanometre particles with different size and shapes by adjusting temp, and time, the ultraviolet adsorbing and fluorescence spectroscopic data of sol formed in methylbenzene dissolvant indicates said products has very good quantum characteristic and very narrow size distribution. The final product is cadimium selenide nanometre particles with high quality, single size distribution and with out needing size classifying.

Description

technical field [0001] The invention belongs to a metal-organic synthesis method of cadmium selenide nano particles, in particular to a method for preparing nano cadmium selenide particles by using alkoxy cadmium as a reactive cadmium source. 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 polymer materials, and thin-film luminescent samples are prepared by spin coating and other methods. Nano-semiconductors of cadmium sulfide and cadmium selenide have very att...

Claims

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Application Information

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IPC IPC(8): C01B19/04C01G11/00
Inventor 刘晓播陈延明姬相玲蒋世春安立佳姜炳政
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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