Mechanism of energy transfer in Sr2CeO4:Eu phosphor |
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Authors: | Oleg Viagin Andrey Masalov Irina Ganina Yuriy Malyukin |
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Affiliation: | aInstitute for Scintillation Materials, STC “Institute for Single Crystals”, National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine |
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Abstract: | Blue–white phosphor Sr2CeO4 belongs to a particular class of optical materials whose luminescence is governed by optical transitions associated with the electron charge transfer. The originality of its crystallographic structure, a chain-like sequence of luminescent centers, permits an effective transfer of the electronic excitation energy from the host to doped centers. Sr2CeO4, рure and doped with Eu3+-ions of different concentrations, was synthesized by the Pechini citrate-gel method. The luminescence spectra and luminescence decay curves of Sr2CeO4 and Sr2CeO4:Eu3+ at 300 and 80 K were investigated. The performed experiments revealed the Förster nonradiative energy transfer under the energy migration condition from the crystal host to the doped europium ions. |
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Keywords: | Sr2CeO4 phosphor Charge transfer luminescence Eu(III) Energy transfer Fö rster mechanism |
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