Synthesis, structural, optical and Raman studies of pure and lanthanum doped ZnSe nanoparticles

Kumar, Pushpendra, Singh, Jai, Pandey, Mukesh Kumar, Jeyanthi, C. E., Siddheswaran, R., Paulraj, M., Hui, K. N. and Hui, K. S. (2014) Synthesis, structural, optical and Raman studies of pure and lanthanum doped ZnSe nanoparticles. Materials Research Bulletin, 49. pp. 144-150. ISSN 0025-5408

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Abstract

In this work, a simple, effective and reproducible chemical synthetic route for the production of high-quality, pure ZnSe nanoparticles (NPs), and lanthanum-doped ZnSe (ZnSe:La) NPs is presented. The wide bandgap, luminescent pure ZnSe and ZnSe:La NPs has been synthesized at a low temperature (100 C) in a single template-free step. The size and optical bandgap of the NPs was analyzed from powder X-ray diffraction (XRD), UV-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM), and high resolution transmission electron microscopy (HRTEM). A broad photoluminescence (PL) emission across the visible spectrum has been demonstrated by a systematic blue-shift in emission due to the formation of small nanoparticles. Here, contribution to emission intensity from surface states of NPs increases with La doping. TEM data revealed that the average size of ZnSe and ZnSe:La NPs is 14 and 8 nm, respectively. On the other hand, band gap energy Eg of ZnSe and ZnSe:La NPs were found to be 3.59 eV and 3.65 eV, respectively. Results showed that hydrazine hydrate played multiple roles in the formation of ZnSe and ZnSe:La NPs. A possible reaction mechanism for the growth of NPs is also discussed.

Item Type: Article
Uncontrolled Keywords: a. inorganic compounds,a. semiconductors,b. chemical synthesis,b. optical properties,c. x-ray diffraction,d. crystal structure
Faculty \ School: Faculty of Science > School of Mathematics
Faculty of Science
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 12:01
Last Modified: 16 Sep 2019 09:32
URI: https://ueaeprints.uea.ac.uk/id/eprint/60670
DOI: 10.1016/j.materresbull.2013.08.060

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