Localized Surface Plasmon Resonance in SnS:Ag Nano-composite Films

TL;DR

This study investigates the plasmonic properties of SnS:Ag nano-composite films, demonstrating how silver nanoparticles enhance light scattering, which could improve the efficiency of SnS-based solar cells.

Contribution

The paper provides a theoretical and experimental analysis of surface plasmon resonance in SnS:Ag films, linking nanoparticle morphology to optical properties and potential solar cell applications.

Findings

Two distinct plasmon resonance peaks identified at 500 nm and 580 nm.

Silver nanoparticles effectively scatter light, enhancing optical properties.

Potential for improved SnS solar cell efficiencies through plasmonic effects.

Abstract

Nano-composite films of Tin Sulfide (SnS) and silver (Ag) fabricated by thermal evaporation showed two prominent peaks in the visible region of their extinction spectra. Theoretical modeling of the extinction spectra suggest that these two peaks (500 nm and 580 nm) correspond to the longitudinal mode (LM) and transverse mode (TM) surface plasmon resonance peaks arising from oblate silver nano-particles. Using grain size of silver and SnS obtained from structural and morphological characterizations of the samples and dielectric constants as per actuals, we have compared the experimental results with those from theory. The study shows that silver nano-particles efficiently scatters light and can be used for developing plasmonic based SnS solar cells with improved efficiencies.