Abstract
This work reports the effect of electron beam (EB) irradiation on the structure and optical properties of nanocrystalline nickel oxide (NiO) cubes. NiO nanocubes were synthesized by the chemical precipitation method. The characterization was carried out by employing analytical techniques like X-ray diffraction, transmission electron microscopy, UV–visible and photoluminescence (PL) spectroscopy. The present investigation found that non-stoichiometry, defects and particle size variation caused by EB irradiation have a great influence on optical band gap, blue shift and band modification of absorption and PL spectra. Moreover, EB irradiation can result enhanced optical absorption performance and photo-activity in NiO nanocubes for optoelectronics and photo-catalytic applications. The study of International Commission on Illumination chromaticity diagram indicates that NiO can be developed as a suitable phosphor material for the application in near ultraviolet excited colour LEDs.
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Acknowledgements
We thank to Nirmala College, Muvattupuzha, Kerala, Newman College, Thodupuzha, Kerala and Microtron centre, Mangalore University, Karnataka State, for providing the opportunity to undertake this study. We are grateful to KSCSTE, Thiruvananthapuram, for the financial support. Financial support by UGC (minor project) is gratefully acknowledged by Sheena P A.
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SHEENA, P.A., PRIYANKA, K.P., SABU, N.A. et al. Effect of electron beam irradiation on the structure and optical properties of nickel oxide nanocubes. Bull Mater Sci 38, 825–830 (2015). https://doi.org/10.1007/s12034-015-0953-5
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DOI: https://doi.org/10.1007/s12034-015-0953-5