期刊
JOURNAL OF EXPERIMENTAL NANOSCIENCE
卷 10, 期 17, 页码 1319-1326出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17458080.2015.1007096
关键词
dielectrics; porous silicon; silicon nanoparticles; sol-gel
Silicon nanoparticles (Si-NPs) obtained by electrochemical etching of silicon wafer were incorporated into various dielectric matrices using sol-gel method. To attain a wide range of dielectric constant and band gap energy, three matrices are selected (SiO2, ZrO2 and TiO2) and the Si-NPs were incorporated in these matrices at different concentrations. Structural studies by transmission electron microscopy and Raman spectroscopy confirm the presence of Si-NPs in the matrices. Moreover, the significant compressive stress induced by the matrix is observed. Photoluminescence (PL) studies show that Si-NPs preserve their luminescent properties in SiO2 matrix and ZrO2 matrix but not in TiO2 matrix. The PL peak position depends not only on the dimension of Si-NPs but also depends on their concentrations. This is due to the coupling effect between the nanoparticles which increases with concentration.
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