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Optical and structural studies on SnS thin films grown by spray pyrolysis technique

M. SUDHA1,* , P. DURAISAMY2

Affiliation

  1. Assistant Professor, Sengunthar College of Engineering, Tiruchengode, Tamilnadu, India
  2. AssociateProfessor, Thiruvalluvar Arts and Science College, Rasipuram, Tamilnadu, India

Abstract

SnS thin film was grown on a glass substrate by using the spray Pyrolysis technique. This is relatively a new material which exhibits excellent properties to be used as an absorbent layer in solar cells. X-ray diffraction (XRD) measurements indicate that the synthesized samples were grown in two different phases (SnS,SnS2) in the same deposition conditions but at different temperatures. However, through an extensive parameter study, conditions were found favourable to grow thin films predominantly in the SnS phase with orthorhombic structure at 400ºC. Optical properties were analyzed by transmission, extinction coefficient and refractive index spectra. The optical method was used to determine the band gaps of the films. Uniform deposition of the material over the entire glass substrate with pin holes was revealed by scanning electron microscope (SEM).The band gap was found to be varying from 1.3eV to 1.8eV respectively..

Keywords

Spray pyrolysis, XRD, Optical property, SEM.

Citation

M. SUDHA, P. DURAISAMY, Optical and structural studies on SnS thin films grown by spray pyrolysis technique, Optoelectronics and Advanced Materials - Rapid Communications, 6, 11-12, November-December 2012, pp.999-1003 (2012).

Submitted at: July 5, 2012

Accepted at: Oct. 30, 2012