The Role of Solvent Environment on the Optical Behavior of Chemically Synthesized Silicon Nanoparticles

Abstract EN

Silicon nanoparticles (Si-NPs) were prepared by solution-based chemical etching method.

Optical characteristics of the as-prepared Si-NPs were investigated in different polar and nonpolar organic solvents.

The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents).

The variation in absorption coefficient was observed because of the solvent interaction nature of Si-NPs.

Si-NPs in polar aprotic and nonpolar solvents manifested good luminescence under UV excitation.

PL intensities were observed to be depending on etched cross-section area on wafer surface.

The results show a linear dependence of the refractive index (n) on wavelength (λ).

The nature of solvents altered the luminescence efficiency of Si-NPs when examining under UV lamp.

The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents) through electrostatic interaction of various organic solvents with the Si-NPs.

The band shapes of the Si-NPs show remarkable changes in passing from noncoordinating solvent (chloroform) to various coordinating solvents, which was the result of change in the environment around Si-NPs in various solutions.