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Effective photoluminescence in a large-area array of Ta2O5 nanodots
Rupesh S Devan1, Ching-Ling Lin, Jin-Han Lin
1Department of Physics, National Dong Hwa University, Hualien-97401, Taiwan, China.
Abstract:
We describe here the synthesis of a large-area Ta2O5 nanodot array by utilizing the hot filament metal vapor deposition technique. The Ta2O5 nanodots arranged in a large-area array on a Si wafer had an average diameter of -8 nm. X-ray photoemission spectroscopy (XPS) revealed the stoichiometric Ta and O compositions of the Ta2O5 nanodots. Raman spectroscopy showed the Ta2O5 nanodots to be of orthorhombic (beta) crystal. Photoluminescence (PL) spectroscopy showed the green and red light emissions of the beta-Ta2O5 nanodots at room temperature.
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