Synthesis and Luminescent Properties of Europium(III, II) Phosphates


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Abstract

Nanosized europium phosphates Eu3PO7, Eu(PO3)3, and Eu(PO3)3: Eu2+ have been prepared by low-temperature extraction-pyrolytic method. Optimal temperature and time of precursor pyrolysis for preparing luminophor containing europium in different oxidation states have been determined. Phosphate luminophore based on Eu3+ exhibit intense red luminescence with λmax ∼ 600–650 nm. Luminescence spectra of Eu(PO3)3: Eu2+ are characterized by emission bands in the region 400–700 nm typical for both Eu3+ (the bands of 5D07Fj(j = 0, 1, 2) transitions), and Eu2+ (the band of 4f65d → 8S7/2 transition). Luminescence-exciting wavelengths provide different contribution to the radiation intensity of both Eu2+ and Eu3+.

About the authors

N. I. Steblevskaya

Institute of Chemistry, Far Eastern Branch

Author for correspondence.
Email: steblevskaya@ich.dvo.ru
Russian Federation, Vladivostok, 690022

M. V. Belobeletskaya

Institute of Chemistry, Far Eastern Branch

Email: steblevskaya@ich.dvo.ru
Russian Federation, Vladivostok, 690022

A. Yu. Ustinov

Institute of Chemistry, Far Eastern Branch; Far Eastern Federal University

Email: steblevskaya@ich.dvo.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091

M. A. Medkov

Institute of Chemistry, Far Eastern Branch

Email: steblevskaya@ich.dvo.ru
Russian Federation, Vladivostok, 690022

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