Preparation method of rock-salt mine structure Co-doped CdS diluted magnetic semiconductor nanoparticles

Abstract

The invention relates to a preparation method of rock-salt mine structure Co-doped CdS diluted magnetic semiconductor nanoparticles, and belongs to the technical field of preparation of diluted magnetic semiconductor nano-particle materials. The preparation method comprises the following steps: taking sphalerite structure Co-doped CdS diluted magnetic semiconductor nanoparticles as initial raw materials, keeping the pressure for 30-50min under the conditions that the pressure is 5.0-7.0GPa and the temperature is 600-800 DEG C, and performing cooling and pressure relief to obtain the rock-salt mine structure Co-doped CdS diluted magnetic semiconductor nanoparticles. According to the preparation method disclosed by the invention, the high-temperature and high-pressure method is utilized to synthesize the rock-salt mine structure Co-doped CdS diluted magnetic semiconductor nanoparticles; the forbidden bandwidth of a rock-salt mine CdS diluted magnetic semiconductor is 1.5-1.7eV; furthermore, the rock-salt mine CdS diluted magnetic semiconductor is an indirect band gap semiconductor and formed by combining the rock-salt mine structure with the sphalerite structure, and the band gap can change continuously within the whole spectral region from near ultraviolet light to far infrared light; and simultaneously, the rock-salt mine structure Co-doped CdS diluted magnetic semiconductor nanoparticles have room temperature ferromagnetism and thus become ideal materials for various optoelectronic and magneto-optical devices.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of dilute magnetic semiconductor nanoparticle materials, and relates to a method for synthesizing Co-doped CdS dilute magnetic semiconductor nanoparticle by using a method under extreme conditions such as high temperature and high pressure. Background technique: [0002] The high temperature and high pressure synthesis method refers to the method of synthesizing materials with high temperature and high pressure equipment such as a six-sided top press. This method provides pressure parameters other than the preparation temperature and element ratio that traditional preparation materials focus on, which plays a very positive role in the preparation and selection of materials. In the process of material preparation, the temperature and pressure of preparation are two very important process parameters, and they play a very important role in the preparation process. Temperature determines whether...

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Problems solved by technology

[0004] There are few reports on Co-doped CdS dilute magnetic semiconductor nanoparticles. The preparation method and ferromagnetic research of Co-doped CdS dilute magnetic semiconductor nanoparticles are limited to wurtzite structure or sphalerite structure. There is no report on the high temperature and high pressure preparation method of Co doped CdS dilute magnetic semiconductor material

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