Nanocrystalline PbS Thin Films: Synthesis, Microstructural And Optoelectronic Properties.

We report the synthesis, microstructural, optical and electrical properties of nanocrystalline lead sulphide thin films grown on glass substrates by using sol gel spin coating techniques. The XRD and SEM measurements confirmed that the thin films grown by this technique have good crystalline cubic structures and homogeneous surfaces. The dc electrical conductivity found in the range of 10^-5 to 10^-6 (Ωcm)^-1. The optical studies revealed that the high absorption coefficient (≈10⁴ cm^-1) with direct energy gap of 0.41 eV. [ABSTRACT FROM AUTHOR]