https://doi.org/10.1051/epjap/2012120359
Effect of selenium doping on structural and optical properties of SnS:Se thin films by electron beam evaporation method
1
Department of Physics, Manonmaniam Sundaranar University, Tirunelveli 627 012, Tamil Nadu, India
2
Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India
3
CISL, Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India
a e-mail: kmohanraj.msu@gmail.com
Received:
6
September
2012
Revised:
16
November
2012
Accepted:
22
November
2012
Published online:
14
January
2013
SnS nanoparticle has been synthesized initially using SnCl2 · 2H2O and Na2S · XH2O, in the presence of TEA by precipitation method and XRD and FTIR techniques have been used for characterization of the sample. Powder X-ray diffraction studies revealed the particle size to be 48 nm and the pattern represents polycrystalline herzenbergite orthorhombic crystal structure of SnS. The FTIR result also confirmed the SnS at 2354 cm−1. Secondly SnS:Se thin films have been deposited on glass substrates by electron beam evaporation technique and the films were annealed at 100 °C and 200 °C for 1 h. The unannealed films are amorphous in nature and the annealed film shows that a sharp crystalline peak is due to SnS. Also a peak is shown at 2θ = 14.39°, which is due to characteristic peak of SnSe2, established by their XRD patterns. The band gap energy (Eg) was determined from transmission spectra and an optical band gap of Eg varies from 1.6 eV to 1.79 eV.
© EDP Sciences, 2013
