Abstract
The concentration and temperature dependence of emission and excitation spectra was measured on powder A1N∶Eu phosphors. It was shown that A1N: Eu has two luminescent modifications which depend on the activator concentration. At low activator concentration the wide emission band is found in the blue-green region, while at high concentration it is in green region. The excitation spectra of A1N∶Eu consist of wide bands extended from 40×103 cm−1 to 22 × × 103 cm−1. The emission and excitation spectra are interpreted as transitions between energy levels of Eu2+ ions (4f7⇄4f6 5d transitions). The structure of the Eu2+ luminescent centres and the temperature dependence of luminescence are discussed.
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The authors thank Dr. M.Polcarová for the RTG measurements and Mrs. I.Míšková for the spectral analysis of the A1N: Eu samples. The authors are also grateful to Prof. M.Trlifaj, Dr. J.Pastrňák and Dr. J.Kubátová for valuable discussions.
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Karel, F., Mareš, J. Luminescent properties of A1N activated by europium. Czech J Phys 23, 652–659 (1973). https://doi.org/10.1007/BF01593916
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DOI: https://doi.org/10.1007/BF01593916