We used the open cell photoacoustic technique to obtain the photoacoustic s
ignal (PAS) of a CdTe thin film (grown over an slide of glass), we measured
its effective thermal diffusivity of the system, the surface recombination
velocities of the charge carriers and the recombination time in the bulk W
e also studied semiconductor samples made from powders of RuTe, RuS, RuSe2
and CdTe. This materials were compressed to form circular and flat pellets
and in this way, they where attached at The sound inlet of an electrect mic
rophone. We measured thermal and electronic transport parameters of such ma
terials. The analysis used the amplitude and phase data of the PAS, and fit
ted the theoretical model for PA spectroscopy of semiconductor, in the OCP
technique (Pinto-Neto and Dramicanin), taking in account that the samples w
ere opaque and thermally thick.