Annealing effect of CdS thin films deposited by chemical bath deposition on different substrates

Yoann Robin (1) , Matthieu Moret (1) , Sandra Ruffenach (1) , Roger Aulombard (1) , Olivier Briot (1)

1 L2C - Laboratoire Charles Coulomb

CdS thin films were grown on different substrates (glass, GaAs, Si, Al2O3) by CBD. The rms roughness of the CdS layers, measured on AFM pictures, ranges from 11 to 95 nm depending on the chemical nature of the substrate Thermal annealing of the samples leads to an improvement of the CdS crystalline quality with a conversion from cubic to hexagonal phase, whatever substrate is used, as assessed by XRD. Thermal annealing also improves the optical properties. While as-grown CdS layers photoluminescence is due to defect related emission around 1.7eV, annealed samples show dominant near band edge photoluminescence emission around 2.4 e V.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux

Yoann Robin, Matthieu Moret, Sandra Ruffenach, Roger Aulombard, Olivier Briot. Annealing effect of CdS thin films deposited by chemical bath deposition on different substrates. Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th, Jun 2013, Tampa, United States. pp.1173, ⟨10.1109/PVSC.2013.6744349⟩. ⟨hal-01009387⟩