Abstract
The confinement effects on the optical characteristics of silicon nanoparticles (Si-NPs) are very attractive for a variety of low-cost applications of this nontoxic material in light emitting devices and photovoltaics. However, effective utilization of these properties in devices have been limited as chemically prepared Si-NPs are highly prone towards oxidation to form amorphous silica. Surface modified luminescent Si-NPs are synthesized by an inexpensive wet-chemical solution-based route by hydrolyzing the silicon tetrachloride (SiCl4) and terminating the Si dangling bonds by using different capping ligands. Structural, optical and electrical properties are studied and the photoluminescence (PL) characteristics are correlated to its core–shell structure. The photoluminescence characteristics of the surface modified Si-NPs of virtually identical sizes in the core was accounted in terms of effects from the variations in the cell-structure on the surface of Si-NPs introduced by changes in the nature of siloxane capping.
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