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Title: | Down-conversion photoluminescence of ZrO<inf>2</inf>:Er<sup>3+</sup> coatings formed by plasma electrolytic oxidation | Authors: | Stojadinović, Stevan Tadić, N. Vasilić, Rastko |
Keywords: | Er 3+;Luminescence;Phosphors;Plasma electrolytic oxidation;ZrO 2 | Issue Date: | 15-May-2018 | Journal: | Materials Letters | Abstract: | Plasma electrolytic oxidation of zirconium in alkaline solution containing Er2O3 powder was used for preparation of ZrO2:Er3+ coatings. Photoluminescence (PL) emission spectra of ZrO2:Er3+ excited by ultraviolet irradiation are composed of broad PL band associated with ZrO2 host and sharp bands corresponding to f–f transitions of Er3+. The strongest green PL emission band of Er3+ in the range from 540 nm to 580 nm is assigned to 4S3/2 → 4I15/2 transition. The PL excitation spectra of ZrO2:Er3+ characterize broad band from 250 nm to 350 nm associated with charge transfer state of Er3+ and the series of peaks in the range from 350 nm to 530 nm which are associated with 4f transitions of the Er3+ from ground state 4I15/2 to higher levels. Obtained results allowed the identification of down-conversion PL mechanism. |
URI: | https://physrep.ff.bg.ac.rs/handle/123456789/1034 | ISSN: | 0167-577X | DOI: | 10.1016/j.matlet.2018.02.126 |
Appears in Collections: | Journal Article |
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