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Enhanced UV emission in ZnO/ZnS core shell nanoparticles prepared by epitaxial growth in solution

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Abstract

Co-precipitation in highly alkaline environment resulted in well crystalline ZnO nanoparticles over which ZnS shell was grown in situ in solution at room temperature. Formation of epitaxial hexagonal ZnS over wurtzite ZnO core particles have been confirmed by x-ray diffraction and transmission electron microscopy studies. The core ZnO nanoparticles show prominent UV emission which enhances appreciably due to ZnS shell formation in ZnO/ZnS core/shell particles. Experimental evidence indicates the quenching of non radiative recombination pathways due to shell formation. The results suggest that synthesized epitaxial core/shell particles have charge confinement mainly in the core region with type I characteristics of band alignment and can be useful for device applications.

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Authors and Affiliations

  1. Luminescent Materials Group, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India

    Simmi Sharma & Santa Chawla

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  1. Simmi Sharma
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  2. Santa Chawla
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Correspondence to Santa Chawla.

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Sharma, S., Chawla, S. Enhanced UV emission in ZnO/ZnS core shell nanoparticles prepared by epitaxial growth in solution. Electron. Mater. Lett. 9, 267–271 (2013). https://doi.org/10.1007/s13391-012-2222-8

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  • DOI: https://doi.org/10.1007/s13391-012-2222-8

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