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Title: Study of energy transfer mechanism from ZnO nanocrystals to Eu3+ ions
Authors: Mangalam, Vivek
Pita, Kantisara
Couteau, Christophe
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Zinc Oxide Nanocrystals
Energy Transfer Mechanism
Issue Date: 2016
Source: Mangalam, V., Pita, K., & Couteau, C. (2016). Study of energy transfer mechanism from ZnO nanocrystals to Eu3+ ions. Nanoscale Research Letters, 11(1), 73-. doi:10.1186/s11671-016-1282-3
Series/Report no.: Nanoscale Research Letters
Abstract: In this work, we investigate the efficient energy transfer occurring between ZnO nanocrystals (ZnO-nc) and europium (Eu3+) ions embedded in a SiO2 matrix prepared using the sol-gel technique. We show that a strong red emission was observed at 614 nm when the ZnO-nc were excited using a continuous optical excitation at 325 nm. This emission is due to the radiative 5D0 → 7F2 de-excitation of the Eu3+ ions and has been conclusively shown to be due to the energy transfer from the excited ZnO-nc to the Eu3+ ions. The photoluminescence excitation spectra are also examined in this work to confirm the energy transfer from ZnO-nc to the Eu3+ ions. Furthermore, we study various de-excitation processes from the excited ZnO-nc and their contribution to the energy transfer to Eu3+ ions. We also report the optimum fabrication process for maximum red emission at 614 nm from the samples where we show a strong dependence on the annealing temperature and the Eu3+ concentration in the sample. The maximum red emission is observed with 12 mol% Eu3+ annealed at 450 °C. This work provides a better understanding of the energy transfer mechanism from ZnO-nc to Eu3+ ions and is important for applications in photonics, especially for light emitting devices.
ISSN: 1931-7573
Rights: © 2016 Mangalam et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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