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PbS Nanostructured Thin Films by In Situ Cu-Doping

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PbS:Cu nanocrystalline films were prepared by chemical bath at temperature of 80 °C and deposited on glass substrates. Different Cu-doping levels were obtained changing the volume of the Cu-reagent-solution into the PbS growing solution. X-ray diffraction (XRD) and optical absorption (OA) measurements were carried out to characterize the semiconductor. The morphological changes of the layers were analyzed using an atomic force microscopy. Diffraction X-ray spectra displayed peaks at 2 =(26.00, 30.07, 43.10, 51.00 and 53.48), indicating growth on the zinc blende face. The grain size determined by X-rays diffraction of the undoped samples, was found ∼37 nm, whereas with the doped sample was ∼32–25 nm. Raman spectra reports strong band in ∼133–140 cm−1 attributed to a combination of longitudinal and transversal acoustic modes. Optical absorption, forbidden band gap energy (Eg ) shift disclose a shift in the range 1.4–2.4 eV. Gibbs free energy calculation for the Cu doping PbS is also included heading.
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Document Type: Research Article

Publication date: July 1, 2014

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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