Grain Size and Lattice Parameter's Influence on Band Gap of SnS Thin Nano-crystalline Films

TL;DR

This study investigates how grain size and lattice parameters affect the band gap of SnS nano-crystalline films, combining experimental and theoretical approaches to understand their influence and interdependence.

Contribution

It provides a combined experimental and theoretical analysis of how grain size and lattice parameters influence the band gap in SnS thin films, treating it as a two-variable problem.

Findings

Band gap depends on lattice parameter and grain size.

Theoretical calculations verify experimental dependency on lattice parameter.

Effective mass varies with lattice unit volume.

Abstract

The parameters influencing the band gap of tin sulphide thin nano-crystalline films have been investigated. Both grain size and lattice parameters are known to influence the band gap. The present study initially investigates each contribution individually. The experimentally determined dependency on lattice parameter is verified by theoretical calculations. We also suggest how to treat the variation of band gap as a two variable problem. The results allow us to show dependency of effective mass (reduced) on lattice unit volume.