Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88434
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.
URI: https://hdl.handle.net/10356/88434
http://hdl.handle.net/10220/46919
ISSN: 1931-7573
DOI: http://dx.doi.org/10.1186/s11671-016-1282-3
Rights: © 2016 Mangalam et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), 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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