Funct. Mater. 2017; 24 (4): 516-520.
Energy transport in EuAl2.07(B4O10)O0.6 nanocrystals with two-dimensional Eu3+ sublattice
1Institute for Scintillation Materials, STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Nauky Ave., 61001 Kharkiv, Ukraine
2V.Karazin Kharkiv National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine
Energy transport processes in EuAl2.07(B4O10)O0.6 nanocrystals with two-dimensional arrangement of Eu3+ subsystem were investigated using the methods of stationary and time-resolved spectroscopy. Sufficient difference in Eu3+-Eu3+ distances inside and between (001) planes (4.58 ??? vis 9.28 ???, respectively) leads to two-dimensional character of energy migration. Comparison of energy transport processes in aluminium borate nanocrystals with two-dimensional (EuAl2.07(B4O10)O0.6) and three-dimensional (EuAl3(BO3)4) arrangement of Eu3+ ions have shown that despite higher Eu3+-Eu3+ shortest distances (5.9 ???), energy migration in EuAl3(BO3)4 leads to stronger quenching of Eu3+ luminescence.
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