Effect of different S/In ratio of In2S3 films prepared by chemical spray pyrolysis method

Samira Elfarrass (1, 2) , Bouchaib Hartiti (1) , Abderraouf Ridah (2) , Philippe Thevenin (3)

1 MAC & PM Laboratory, ANEPMAER Group, FSTM
2 LIMAT - Laboratoire d'Ingénierie et Matériaux [Casablanca]
3 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes

In2S3 thin films were prepared using chemical spray pyrolysis technique. An aqueous solution of InCl3 and CS(NH2)2 was sprayed on to glass substrates and kept at 300 °C, using air as a carrier gas. Stoichiometry of the films was varied by adjusting the molarity of the spray solution. Structure and properties of films with different S/In ratios have been investigated. Raman spectroscopy present bands at 302 and 329 cm-1 indicating the presence of the β-phase in all the films. Optical transmittance of films is over 80% in the visible region and its energy band gap decreases from 2.7 to 2.67 ev. PL emission in the wavelength range 300-800 nm was recorded.

Mots clés: In2S3; Thin films; PL spectroscopy; Spray pyrolysis; S/In ratios

Domaines: Sciences de l'ingénieur [physics]

Samira Elfarrass, Bouchaib Hartiti, Abderraouf Ridah, Philippe Thevenin. Effect of different S/In ratio of In2S3 films prepared by chemical spray pyrolysis method. Journal of Materials and Environmental Science , 2015, 6 (2), pp.487-490. ⟨hal-02434090⟩