Luminescence Properties and Decay Kinetics of Mn2+ and Eu3+ Co-Dopant Ions In MgGa2O4 Ceramics

A. Luchechko 1 , Ya. Zhydachevskyy 2 , 3 , D. Sugak 2 , O. Kravets 1 , N. Martynyuk 2 , A.I. Popov 4 , S. Ubizskii 2 , and A. Suchocki 3 , 5
  • 1 Ivan Franko National University of Lviv, , 79017, Lviv, Ukraine
  • 2 Lviv Polytechnic National University, , 79646, Lviv, Ukraine
  • 3 Institute of Physics, Polish Academy of Sciences, , 02-668, Warsaw, Poland
  • 4 Institute of Solid State Physics, University of Latvia, Latvia
  • 5 Institute of Physics, University of Bydgoszcz, 85-072, Bydgoszcz, Poland

Abstract

The MgGa2O4 ceramics co-doped with Mn2+ and Eu3+ ions were synthesized via a high-temperature solid-state reaction technique. The samples with various Eu3+ concentrations were characterised using high-resolution photoluminescence (PL) spectroscopy. The PL spectra show weak matrix emission in a blue spectral region with dominant excitation band around 380 nm. Manganese ions are highly excited deeply in UV region and exhibit emission band peaked at 502 nm. The Eu3+ ions show characteristic f-f excitation and emission lines. The energy transfer between host defects and activator ions was observed. Luminescence decay curves of Mn2+ and Eu3+ emission showed complex kinetics with both Eu3+-ion concentration and excitation wavelength changes.

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