Abstract

Subject of study. In this paper, we describe the luminescence properties of nanopowders of composition (Nd_0.008Y_0.992)₂O₃, (Nd_0.008Y_0.992)₂O₃+6mol%ZrO₂, and (Nd_0.008Gd_0.496Y_0.496)₂O₃+5mol.%ZrO₂ with various percentages of monoclinic and cubic phases. Method. Photoluminescence and pulsed cathodoluminescence spectra are recorded, followed by interpretation of the results obtained. Main results. In the process of studying the luminescence bands corresponding to the ⁴F_3/2→⁴I_9/2 and ⁴F_3/2→⁴I_11/2 energy transitions for neodymium ions in nanopowder crystalline lattices, we identify several spectroscopic and kinetic properties that can be used to identify the substances and determine the crystal phases present. We show that there is slight broadening of the spectral lines in the continuum base of the ⁴F_3/2→⁴I_11/2 manifold; the intensity level below which the bands merge into a continuum increases as the amount of structural disorder caused by the zirconium- and gadolinium-ion dopants in the Y₂O₃ increases. Practical significance. The distinctive features of the photoluminescence spectra and the kinetics of neodymium-ion luminescence in the ⁴F_3/2→⁴I_9/2 and ⁴F_3/2→⁴I_11/2 bands can be used for unique identification of the substances present and determination of the crystal phases thereof; this will be of practical interest in the development of high-bandwidth ceramic active elements.

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