Laser site-selective spectroscopy of Eu3+ ions doped Y4Al2O9
Marcin Piotr Kaczkan , Sebastian Turczyński , Dorota A. Pawlak , Magdalena Wencka , Michał Malinowski
AbstractEu3+ doped Y4Al2O9 (YAM) crystals were prepared by the micro-pulling down method. Optical-absorption and laser-selective-excitation techniques along with the luminescence decays have been used to reveal that Eu3+ ions in YAM occupy three distinct sites, which were characterized and discussed. The Stark energy levels of Eu3+ at three different sites in YAM were assigned from selectively excited emission spectra at 10 K. The intensity ratio of forced electric dipole (5D0 → 7F2) and magnetic dipole (5D0 → 7F1) transitions was discussed in order to obtain information about the degree of asymmetry of the luminescent centers. These results were confirmed by the luminescence lifetime measurements. The temperature dependent photo-luminescence spectra indicated that there is no energy transfer between different sites in the 10–300 K range.
|Journal series||Optical Materials, ISSN 0925-3467|
|Publication size in sheets||0.5|
|Keywords in English||Eu3+ ion; Photoluminescence; Red phosphor; Site-selective spectroscopy|
|Score|| = 30.0, 27-03-2017, ArticleFromJournal|
= 35.0, 27-03-2017, ArticleFromJournal
|Publication indicators||: 2016 = 2.238 (2) - 2016=2.209 (5)|
|Citation count*||7 (2018-06-21)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.