Molar ratio S/In effect on properties of sprayed In2S3 films

Nourredine Bouguila , Abdelmajid Timoumi , Hassen Bouzouita , Emmanuelle Lacaze (1) , Habib Bouchriha , Bahri Rezig

1 INSP - Institut des Nanosciences de Paris

We have studied the structural, morphological and optical properties of In2S3 layers deposited on glass substrate by the spray pyrolysis method with the molar ratio S/In varies from 1 to 4. The substrate temperature was maintained at 613 K. The characteristics of these films have been determined by X-ray diffraction (XRD), optical absorption-transmission and atomic force microscopy (AFM). Their structure is strongly dependent on the molar ratio. The deposit is mainly constituted by the beta phase towards (4 0 0) direction. No characteristic peaks were observed for other impurities such as In2O3, S or In-2(OH)(3). The best crystallinity and surface morphology are obtained at molar ratio equal to 2.5. At this ratio, the crystallites coalesce and the local roughness is of the order of 1 nm. Optical transmission of 80% has been achieved in the visible spectrum. In2S3 band gap energy reached 2.63 eV from layers with x = 2 and deposited at T-s = 613 K.

Domaines: Matière Condensée [cond-mat]

Nourredine Bouguila, Abdelmajid Timoumi, Hassen Bouzouita, Emmanuelle Lacaze, Habib Bouchriha, et al.. Molar ratio S/In effect on properties of sprayed In2S3 films. European Physical Journal: Applied Physics, 2013, 63 (2), pp.20301. ⟨10.1051/epjap/2013130260⟩. ⟨hal-01238971⟩