Study On C₆₀ Production And Silver-doped Films Structure

C60, a new type of semiconductor material, has many superior properties, such as wide forbidden band, direct band gap, rapid responding time, high optical damage threshold value and wide responding frequency band etc. These capabilities indicate that C60 film will be used widely in computer, integrate optical instrument and storage device etc. However, the preparation and the purification of C60 material affect the large-scale application at all times. Although there are few correlative studies on silver-doped films, the same as copper-doped films, there are a lot of scientific values for silver-doped films. So we choose it and make analysis of its structure under the different experimental conditions.This paper presents the effects of some features on the productivity of raw C60 materials, such as distance and approaching speed of electrodes, helium partial pressure and arc current etc. Then we separate and purify the raw materials and obtain pure solid C60 of 99. 9% and compare the purification efficiency and effect of different fluxion phase and fixed phase and discuss the effects of the experimental conditions, such as the depositing speed, the type of the substrate, the surface structure of the substrate and the temperature of the substrate. Finally, we use XPS, AFM, ultraviolet, infrared and Raman to analyze the component, structure and feature of the films qualitatively and quantitatively. Our study indicates:1. A production rate as high as 15% is obtained under the condition of 150torr helium partial pressure, 300A arc current and quick electrode approaching speed as soon as possible.2. With weak surface interaction of substrate, low deposition velocity and high substrate temperature can make pure C60 films generate more orderly.3. The substrate temperature affects roughness degree differently in different regions. In the region of low temperature( lower than 40℃,when the temperature increases, the roughness degree decreases, however in the region of high temperature( higher than 40℃),the case is reversed.4. After having made a survey of ultraviolet spectrum, infrared spectrum and Raman scattering spectrum at different silver-doped rate and compared the theoretical compute with the experimental values in references, we confirm that our new method of the preparation and purification of C60 is reliable and efficient. The testing and analysis data of infrared spectrum and Raman spectrum provide valuable experimental data for thorough study of the microcosmic structure of silver-doped films and theoretical in the future.