This article is cited in 3 papers

CONDENSED MATTER

Luminescence of Eu$^{3+}$ ions in ultradisperse diamond powders

G. E. Malashkevich, V. A. Lapina, G. I. Semkova, P. P. Pershukevich, G. P. Shevchenko

Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus

Abstract: The luminescence of Eu$^{3+}$ ions implanted in ultradisperse diamond powders, activated by impregnating with a solution of Eu(NO$_{3})_3\cdot6$H$_2$O and heat-treated at various temperatures, is studied. A multiple increase in the efficiency of excitation in the charge-transfer band is observed for the $^5!D_0$ state of Eu$^{3+}$ ions as compared to europium nitrate heat-treated similarly. This effect is explained by an increase in the degree of Eu–O bond covalency and a change in the activator coordination polyhedron due to the formation of chemical bonds Eu–O–C.

PACS: 78.55.-m, 78.67.-n

Received: 10.02.2003

 English version: Journal of Experimental and Theoretical Physics Letters, 2003, 77:6, 291–294

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