PbS thin films with thickness between 100 and 150 nm were grown for the first time bymicrowave-assisted chemical bath deposition\nin a commercial automated system with deposition times not exceeding 5 min. X-ray diffraction analysis shows that the thin films\nhave cubic rock salt type structure with good crystallinity. The grain size increased from 18 to 20 nm, as the deposition time\nincreased. Energy dispersive X-ray results confirm that the films are stoichiometric. Optical measurements show that thin films\nhave relatively high absorption coefficients between 10^4 and 10^5 cm-1 in the visible range. In addition, the films exhibit a direct\ngap, within the energy range from 1.0 to 1.35 eV. The electrical properties, such as conductivity, the Seebeck coefficient, carrier\nconcentration, and carrier mobility, are discussed.
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