Application And Research Of Raman Spectra About CuInSe₂and ZnO

Raman spectroscopy is an analysis method which can get the information of molecular structure accurately and rapidly. With the development of science and technology, Raman spectroscopy is widely used in many fields these years. The main content of this paper is the application of semiconductor in Raman spectra and Surface Enhanced Raman Scattering. It has completed two aspect job.Firstly, Copper Indium Selenium (CuInSe2) thin film was deposited on ITO glass by electrochemical method. And a comprehensive research was taken dependent on the Raman spectra of the CIS film. The Raman characteristic peak can prove that the CIS film has chalcopyrite crystal structure. At the same time, the growth of other binary phase and the variation of crystallinity caused by the change of sedimentary potential and annealing process can be observed clearly and accurately from the Raman spectra.Secondly, a new kind of Surface Enhanced Raman Scattering (SERS) substrate was fabricated by covering silver on Zinc oxide (ZnO) film, which was made up of regular hexagon nano sheets on monocrystalline silicon of (100) orientation by aqueous solution. Covering silver on ZnO film can be divided into sputtering silver film and photoreduction of silver particles. This experiment used fluorescent molecules rhodamine6G (R6G) as the probes molecules. It is proved that the two kinds of substrate both have efficient SERS activity according to the analysis, which based on the Raman spectra and surface morphology of different silver thickness substrate and silver particles substrate. While the enhanced effect was not same, and different thickness of silver film also has different effect. Besides, the "hot spots" distribution on the substrate surface was proved to have high uniformity by Raman mapping scanning.