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Preparation of Nanostructured Silicon with Optimal Optical Parametres

ISEF · 2019 Materials Science

Shakim, Amelie · Nazarbayev Intellectual School of Physics and Math

Overview

The project investigated nanoscale silicon structures obtained by electrochemical and metal-assisted chemical etching methods. Silicon nanostructures were chosen as objects of study because they have a wide range of applications in various fields of science and technology. Micrographs of nanostructures were obtained using optical, scanning electron and scanning tunneling microscopes. Optical properties were studied using a spectrophotometer. According to the results of microscopy, the obtained silicon nanostructures had a thickness of about 1 micron, the diameter of the filaments was about 100-300 nm. The results of spectrophotometry showed that nanoscale silicon structures have a lower reflection coefficient and a large absorption coefficient, which in turn shows the usefulness and importance of the methods used to obtain nanostructures for use in creating high efficiency solar cells.

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Source: Regeneron International Science and Engineering Fair

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