Delayed recombination and excited state ionization of the Ce 3+  activator in the SrHfO 3  host | Zendy

Mihóková Eva | Zendy; Jarý Vítězslav | Zendy; Schulman Lawrence S. | Zendy; Nikl Martin | Zendy

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Delayed recombination and excited state ionization of the Ce 3+ activator in the SrHfO 3 host

Author(s) -

Mihóková Eva,

Jarý Vítězslav,

Schulman Lawrence S.,

Nikl Martin

Publication year - 2013

Publication title -

physica status solidi (rrl) – rapid research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.786

H-Index - 68

eISSN - 1862-6270

pISSN - 1862-6254

DOI - 10.1002/pssr.201206499

Subject(s) - excited state , recombination , ionization , luminescence , activator (genetics) , atomic physics , scintillation , excitation , ionization energy , microcrystalline , materials science , chemistry , physics , optoelectronics , ion , optics , crystallography , biochemistry , organic chemistry , quantum mechanics , detector , gene

We determine the thermal ionization energy of the excited state of Ce 3+ in a SrHfO 3 host by a contactless optical method based on the measurement and analysis of delayed recombination decay following UV excitation. We show the applicability of the method for microcrystalline powder samples. The method provides a consistent value of thermal ionization energy of about 0.25 eV, as previously determined by a ther‐ mally stimulated luminescence (TSL) study after UV illumination. We reveal a low temperature contribution to the delayed recombination signal and address its origin. This contribution indicates a complex interaction of the luminescence center with the host lattice neighborhood and the presence of temperature independent losses of fast scintillation light. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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