Silanization effect on the photoluminescence characteristics of crystalline and amorphous silicon nanoparticles

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作者
Paula Caregnato
Maria Laura Dell’Arciprete
Mónica Cristina Gonzalez
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[1] Universidad Nacional de la Plata,Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas
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摘要
Silicon nanoparticles synthesized by two different methods were surface modified with 3-mercaptopropyltrimethoxysilane. The particles of ~2 nm size exhibit photoluminescence (PL) in the UV-Vis range of the spectrum. The most intense PL band at 430 nm with an emission lifetime of 1–2 ns is attributed to the presence of the surface defects Si-O-Si, generated after anchoring the organic molecule onto the interface. The excitation-emission matrix of this band is essentially independent of the technique of synthesis, crystalline structure, and size of the silicon nanoparticles.
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页码:1658 / 1665
页数:7
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