Energy Transfer between Tb 3+ and Eu 3+ in LaPO 4: Pulsed versus Switched-off Continuous Wave Excitation

Yuxia Luo; Zhenyu Liu; Hon Tung Wong; Lei Zhou; Ka-Leung Wong; Kwok Keung Shiu; Peter A. Tanner

doi:10.1002/advs.201900487

Energy Transfer between Tb ³⁺ and Eu ³⁺ in LaPO ₄: Pulsed versus Switched-off Continuous Wave Excitation

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

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

50 Citations (Scopus)

Abstract

The energy transfer (ET) between Tb 3+ and Eu 3+ is investigated experimentally and with available theoretical models in the regime of high Tb 3+ concentrations in ≈30 nm LaPO 4 nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu 3+ -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 Tb 3+ ions, situated on La 3+ sites with ≈4 Å separation, is not fast. The quenching of Tb 3+ emission in singly doped LaPO 4 only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb 3+ and Tb 3+ , Eu 3+ -doped LaPO 4 samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Original language	English
Article number	1900487
Journal	Advanced Science
Volume	6
Issue number	10
DOIs	https://doi.org/10.1002/advs.201900487
Publication status	Published - 17 May 2019
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

K.-L.W. acknowledges financial support from The Hong Kong Research Grants Council (HKBU 12300318) and from Hong Kong Baptist University (RC-ICRS/16-17/02).

Research Keywords

energy transfer
lanthanide
migration
pulse and continuous wave excitation

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

RGC Funding Information

RGC-funded

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title = "Energy Transfer between Tb 3+ and Eu 3+ in LaPO 4: Pulsed versus Switched-off Continuous Wave Excitation",

abstract = "The energy transfer (ET) between Tb 3+ and Eu 3+ is investigated experimentally and with available theoretical models in the regime of high Tb 3+ concentrations in ≈30 nm LaPO 4 nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu 3+ -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 Tb 3+ ions, situated on La 3+ sites with ≈4 {\AA} separation, is not fast. The quenching of Tb 3+ emission in singly doped LaPO 4 only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb 3+ and Tb 3+ , Eu 3+ -doped LaPO 4 samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion. {\textcopyright} 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

keywords = "energy transfer, lanthanide, migration, pulse and continuous wave excitation",

author = "Yuxia Luo and Zhenyu Liu and Wong, {Hon Tung} and Lei Zhou and Ka-Leung Wong and Shiu, {Kwok Keung} and Tanner, {Peter A.}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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TY - JOUR

T1 - Energy Transfer between Tb 3+ and Eu 3+ in LaPO 4

T2 - Pulsed versus Switched-off Continuous Wave Excitation

AU - Luo, Yuxia

AU - Liu, Zhenyu

AU - Wong, Hon Tung

AU - Zhou, Lei

AU - Wong, Ka-Leung

AU - Shiu, Kwok Keung

AU - Tanner, Peter A.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2019/5/17

Y1 - 2019/5/17

N2 - The energy transfer (ET) between Tb 3+ and Eu 3+ is investigated experimentally and with available theoretical models in the regime of high Tb 3+ concentrations in ≈30 nm LaPO 4 nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu 3+ -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 Tb 3+ ions, situated on La 3+ sites with ≈4 Å separation, is not fast. The quenching of Tb 3+ emission in singly doped LaPO 4 only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb 3+ and Tb 3+ , Eu 3+ -doped LaPO 4 samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

AB - The energy transfer (ET) between Tb 3+ and Eu 3+ is investigated experimentally and with available theoretical models in the regime of high Tb 3+ concentrations in ≈30 nm LaPO 4 nanoparticles at room temperature. The ET efficiency approaches 100% even for lightly Eu 3+ -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 Tb 3+ ions, situated on La 3+ sites with ≈4 Å separation, is not fast. The quenching of Tb 3+ emission in singly doped LaPO 4 only reduces the luminescence lifetime by ≈50% in heavily doped samples. Various theoretical models are applied to simulate the luminescence decays of Tb 3+ and Tb 3+ , Eu 3+ -doped LaPO 4 samples of various concentrations and the transfer mechanism is identified as forced electric dipole at each ion. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

KW - energy transfer

KW - lanthanide

KW - migration

KW - pulse and continuous wave excitation

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