A new approach for the synthesis of Y3Al2Ga3O12 (YAGG) nanophosphors allowing the preparation of crystallites with sizes starting from 45 nm is presented. The controllability of the energy and trap density of the resulting material samples by annealing temperature was confirmed by thermoluminescence (TL) measurements. It has been shown that the annealing of samples at temperatures up to 1300 °C does not cause any substantial growth of crystallites, still remaining below 100 nm, but leads to changes in the activation energy of the persistent luminescence (PersL) process. On the other hand, annealing above 1400 °C results in grain growth on the submicron scale, which was confirmed by X-ray powder diffraction (XRPD) and electron transmission microscopy (TEM) measurements. In addition, with an increase in the molar ratio of urea to the total amount of metals used (R), qualitative changes are observed in the PersL process occurring from the excited states of Cr3+ and Pr3+ ions. This proves the influence of the synthesis process, in particular of the metal complexation at its initial stage, on the final structure ordering in the annealed materials. These observations are linked to previously reported defects in the YAGG structure, leading to PersL.

Urea Glass Route as a Way to Optimize YAGG:Ce3+,Cr3+,Pr3+Nanocrystals for Persistent Luminescence Applications / Boiko, V.; Saladino, M. L.; Armetta, F.; Ursi, F.; Markowska, M.; Grzeszkiewicz, K.; Mortalo, C.; Leonelli, C.; Hreniak, D.. - In: LANGMUIR. - ISSN 0743-7463. - 38:38(2022), pp. 11539-11549. [10.1021/acs.langmuir.2c00687]

Urea Glass Route as a Way to Optimize YAGG:Ce3+,Cr3+,Pr3+Nanocrystals for Persistent Luminescence Applications

Leonelli C.
Supervision
;
2022

Abstract

A new approach for the synthesis of Y3Al2Ga3O12 (YAGG) nanophosphors allowing the preparation of crystallites with sizes starting from 45 nm is presented. The controllability of the energy and trap density of the resulting material samples by annealing temperature was confirmed by thermoluminescence (TL) measurements. It has been shown that the annealing of samples at temperatures up to 1300 °C does not cause any substantial growth of crystallites, still remaining below 100 nm, but leads to changes in the activation energy of the persistent luminescence (PersL) process. On the other hand, annealing above 1400 °C results in grain growth on the submicron scale, which was confirmed by X-ray powder diffraction (XRPD) and electron transmission microscopy (TEM) measurements. In addition, with an increase in the molar ratio of urea to the total amount of metals used (R), qualitative changes are observed in the PersL process occurring from the excited states of Cr3+ and Pr3+ ions. This proves the influence of the synthesis process, in particular of the metal complexation at its initial stage, on the final structure ordering in the annealed materials. These observations are linked to previously reported defects in the YAGG structure, leading to PersL.
2022
12-set-2022
38
38
11539
11549
Urea Glass Route as a Way to Optimize YAGG:Ce3+,Cr3+,Pr3+Nanocrystals for Persistent Luminescence Applications / Boiko, V.; Saladino, M. L.; Armetta, F.; Ursi, F.; Markowska, M.; Grzeszkiewicz, K.; Mortalo, C.; Leonelli, C.; Hreniak, D.. - In: LANGMUIR. - ISSN 0743-7463. - 38:38(2022), pp. 11539-11549. [10.1021/acs.langmuir.2c00687]
Boiko, V.; Saladino, M. L.; Armetta, F.; Ursi, F.; Markowska, M.; Grzeszkiewicz, K.; Mortalo, C.; Leonelli, C.; Hreniak, D.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1373133
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