Abstract
We present the results obtained by photomodulation (PM) at room temperature of semiconductor CdS thin films grown in large area (450 cm 2). The thin films were deposited on conducting glass (SnO 2:F 7 Ω/□) by radio frequency-planar magnetron sputtering with a substrate temperature ( T s) of 250 °C, an Argon pressure of 20 mTorr, a radio frequency power of 300 W and with a deposition time ( t d) of 60 min. A thermal treatment with CdCl 2 in these thin films at different annealing times was carried out. In general the PM spectra show a better crystal quality in the CdS thin films annealed with CdCl 2, which is corroborated with atomic force microscopy (AFM) and observed in the efficiency of the solar cells processed with these films.
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