Energy Transfer between Tb<sup>3+</sup> and Eu<sup>3+</sup> in LaPO<sub>4</sub>: Pulsed versus Switched‐off Continuous Wave Excitation: Fid-Bau Portal

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Energy Transfer between Tb³⁺ and Eu³⁺ in LaPO₄: Pulsed versus Switched‐off Continuous Wave Excitation

Luo, Yuxia / Liu, Zhenyu / Wong, Hon Tung / Zhou, Lei / Wong, Ka‐Leung / Shiu, Kwok Keung / Tanner, Peter A.

The energy transfer (ET) between Tb³⁺ and Eu³⁺ is investigated experimentally and with available theoretical models in the regime of high Tb³⁺ concentrations in ≈30 nm LaPO₄ nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu³⁺‐doped materials. The major conclusion from the use of pulsed laser excitation and switched‐off continuous wave laser diode excitation is that the energy migration between Tb³⁺ ions, situated on La³⁺ sites with ≈4 Å separation, is not fast. The quenching of Tb³⁺ emission in singly doped LaPO₄ only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb³⁺ and Tb³⁺, Eu³⁺‐doped LaPO₄ samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion.

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Energy Transfer between Tb³⁺ and Eu³⁺ in LaPO₄: Pulsed versus Switched‐off Continuous Wave Excitation

Luo, Yuxia / Liu, Zhenyu / Wong, Hon Tung / Zhou, Lei / Wong, Ka‐Leung / Shiu, Kwok Keung / Tanner, Peter A.

The energy transfer (ET) between Tb³⁺ and Eu³⁺ is investigated experimentally and with available theoretical models in the regime of high Tb³⁺ concentrations in ≈30 nm LaPO₄ nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu³⁺‐doped materials. The major conclusion from the use of pulsed laser excitation and switched‐off continuous wave laser diode excitation is that the energy migration between Tb³⁺ ions, situated on La³⁺ sites with ≈4 Å separation, is not fast. The quenching of Tb³⁺ emission in singly doped LaPO₄ only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb³⁺ and Tb³⁺, Eu³⁺‐doped LaPO₄ samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion.

Energy Transfer between Tb³⁺ and Eu³⁺ in LaPO₄: Pulsed versus Switched‐off Continuous Wave Excitation

Luo, Yuxia / Liu, Zhenyu / Wong, Hon Tung / Zhou, Lei / Wong, Ka‐Leung / Shiu, Kwok Keung / Tanner, Peter A.

The energy transfer (ET) between Tb³⁺ and Eu³⁺ is investigated experimentally and with available theoretical models in the regime of high Tb³⁺ concentrations in ≈30 nm LaPO₄ nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu³⁺‐doped materials. The major conclusion from the use of pulsed laser excitation and switched‐off continuous wave laser diode excitation is that the energy migration between Tb³⁺ ions, situated on La³⁺ sites with ≈4 Å separation, is not fast. The quenching of Tb³⁺ emission in singly doped LaPO₄ only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb³⁺ and Tb³⁺, Eu³⁺‐doped LaPO₄ samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion.

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Titel:

Energy Transfer between Tb³⁺ and Eu³⁺ in LaPO₄: Pulsed versus Switched‐off Continuous Wave Excitation

Beteiligte:

Luo, Yuxia (Autor:in) / Liu, Zhenyu (Autor:in) / Wong, Hon Tung (Autor:in) / Zhou, Lei (Autor:in) / Wong, Ka‐Leung (Autor:in) / Shiu, Kwok Keung (Autor:in) / Tanner, Peter A. (Autor:in)

Erschienen in:

Advanced Science ; 6

Erscheinungsdatum:

01.05.2019

Format / Umfang:

12 pages

ISSN:

DOI:

https://doi.org/10.1002/advs.201900487

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

pulse and continuous wave excitation , migration , energy transfer , lanthanide

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Correction to Energy transfer between Tb³⁺ and Eu³⁺ in LaPO₄: Pulsed Versus Switched‐Off Continuous Wave Excitation

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