Abstract
In the present investigation, we have successfully synthesized lead sulfide (PbS) thin films by using simple, cost effective and facile aqueous chemical route. The effect of deposition time on optical, structural and morphological properties of PbS thin films were investigated by using UV–Vis–NIR absorption spectroscopy, X-ray diffraction (XRD), photoluminescence, field emission scanning electron microscopy (FESEM), high-resolution-transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The optical band gap energy was varied in the range of 0.96–1.56 eV. The XRD patterns revealed the formation of pure cubic crystal structure. FESEM micrographs demonstrated the conversion of morphology from pyramidal to interconnected nanocubic. HRTEM and selected area electron diffraction (SAED) pattern illustrated that nanoparticles are compact, well interconnected and single crystalline in nature. EDS spectrum confirms that deposited PbS thin films are in good stoichiometry.
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Acknowledgements
One of author KVK indebted to Department of Science and Technology (DST), New Delhi for awarding DST-INSPIRE fellowship. This work is partially supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grand funded by the Korean Government Ministry of Knowledge Economy (No. 20124010203180). This research work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2009–0094055).
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Khot, K.V., Mali, S.S., Pawar, N.B. et al. Novel synthesis of interconnected nanocubic PbS thin films by facile aqueous chemical route. J Mater Sci: Mater Electron 25, 3762–3770 (2014). https://doi.org/10.1007/s10854-014-2087-8
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DOI: https://doi.org/10.1007/s10854-014-2087-8