Mechanism of persistent luminescence in Sr 2 MgSi 2 O 7 :Eu 2+ ; Dy 3+ | Zendy

Dorenbos P. | Zendy

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Mechanism of persistent luminescence in Sr 2 MgSi 2 O 7 :Eu 2+ ; Dy 3+

Author(s) -

Dorenbos P.

Publication year - 2005

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200409080

Subject(s) - luminescence , lanthanide , persistent luminescence , doping , divalent , ion , valence (chemistry) , europium , materials science , samarium , crystallography , conduction band , chemistry , atomic physics , inorganic chemistry , physics , thermoluminescence , electron , optoelectronics , nuclear physics , metallurgy , organic chemistry

A recently developed method to determine the energy levels of divalent lanthanide ions relative to the conduction band and valence band of host compounds is applied to Sr 2 MgSi 2 O 7 doped with Eu 2+ and Dy 3+ . The level locations are not consistent with the widely adopted and generally believed mechanism of persistent luminescence in Eu 2+ and Dy 3+ doped aluminates and silicates. A new mechanism of persistent luminescence is proposed. In this mechanism Eu 3+ and Dy 2+ are the stable trapping centers and not Eu + and Dy 4+ as in the existing mechanism. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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