| Autor: |
Aleksandra A. Vidyakina, Ilya E. Kolesnikov, Nikita A. Bogachev, Mikhail Y. Skripkin, Ilya I. Tumkin, Erkki Lähderanta, Andrey S. Mereshchenko |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Materials, Vol 13, Iss 15, p 3397 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1996-1944 |
| DOI: |
10.3390/ma13153397 |
| Popis: |
β-NaYF4 microcrystals co-doped with Yb3+, Er3+/Tm3+, and Gd3+ ions were synthesized via a hydrothermal method using rare-earth chlorides as the precursors. The SEM and XRD data show that the doped β-NaYF4 form uniform hexagonal prisms with an approximate size of 600–800 nm. The partial substitution of Y by Gd results in size reduction of microcrystals. Upconversion luminescence spectra of microcrystals upon 980 nm excitation contain characteristic intra-configurational ff bands of Er3+/Tm3+ ions. An addition of Gd3+ ions leads to a significant enhancement of upconversion luminescence intensity with maxima at 5 mol % of dopant. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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