Electronic Spectra of Cs2NaYb(NO2)6: Is There Quantum Cutting?

Yuxia Luo; Zhenyu Liu; Sam Chun-Kit Hau; Yau Yuen Yeung; Ka-Leung Wong; Kwok Keung Shiu; Xueyuan Chen; Haomiao Zhu; Guochen Bao; Peter A. Tanner

doi:10.1021/acs.jpca.8b01915

Electronic Spectra of Cs₂NaYb(NO₂)₆: Is There Quantum Cutting?

Yuxia Luo, Zhenyu Liu, Sam Chun-Kit Hau, Yau Yuen Yeung, Ka-Leung Wong, Kwok Keung Shiu, Xueyuan Chen, Haomiao Zhu, Guochen Bao, Peter A. Tanner

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

5 Citations (Scopus)

Abstract

The crystal structure and electronic spectra of the T_h symmetry hexanitritoytterbate(III) anion have been studied in Cs₂NaY_0.96Yb_0.04(NO₂)₆, which crystallizes in the cubic space group Fm3. The emission from Yb³⁺ can be excited via the NO₂^- antenna. The latter electronic transition is situated at more than twice the energy of the former, but at room temperature, one photon absorbed at 470 nm in the triplet state produces no more than one photon emitted. Some degree of quantum cutting is observed at 298 K under 420 nm excitation into the singlet state and at 25 K using excitation into either state. The quantum efficiency is ∼10% at 25 K. The energy level scheme of Yb³⁺ has been deduced from excitation and emission spectra and calculated by crystal field theory. New improved energy level calculations are also reported for the Cs₂NaLn(NO₂)₆ (Ln = Pr, Eu, Tb) series using the f-Spectra package. The neat crystal Cs₂NaYb(NO₂)₆ has also been studied, but results were unsatisfactory due to sample decomposition, and this chemical instability makes it unsuitable for applications. © 2018 American Chemical Society.

Original language	English
Pages (from-to)	4381-4388
Journal	Journal of Physical Chemistry A
Volume	122
Issue number	17
DOIs	https://doi.org/10.1021/acs.jpca.8b01915
Publication status	Published - 3 May 2018
Externally published	Yes

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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

Z.L. acknowledges support by the Natural Science Foundation of China (Grant No. 21701136). Y.Y.Y. acknowledges internal funding from the Education University of Hong Kong. X.C. acknowledges partial support by the CAS/SAFEA International Partnership Program for Creative Research Teams.

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@article{bce503fd958c40178ab80bc9bafaa328,

title = "Electronic Spectra of Cs2NaYb(NO2)6: Is There Quantum Cutting?",

abstract = "The crystal structure and electronic spectra of the Th symmetry hexanitritoytterbate(III) anion have been studied in Cs2NaY0.96Yb0.04(NO2)6, which crystallizes in the cubic space group Fm3. The emission from Yb3+ can be excited via the NO2- antenna. The latter electronic transition is situated at more than twice the energy of the former, but at room temperature, one photon absorbed at 470 nm in the triplet state produces no more than one photon emitted. Some degree of quantum cutting is observed at 298 K under 420 nm excitation into the singlet state and at 25 K using excitation into either state. The quantum efficiency is ∼10% at 25 K. The energy level scheme of Yb3+ has been deduced from excitation and emission spectra and calculated by crystal field theory. New improved energy level calculations are also reported for the Cs2NaLn(NO2)6 (Ln = Pr, Eu, Tb) series using the f-Spectra package. The neat crystal Cs2NaYb(NO2)6 has also been studied, but results were unsatisfactory due to sample decomposition, and this chemical instability makes it unsuitable for applications. {\textcopyright} 2018 American Chemical Society.",

author = "Yuxia Luo and Zhenyu Liu and Hau, {Sam Chun-Kit} and Yeung, {Yau Yuen} and Ka-Leung Wong and Shiu, {Kwok Keung} and Xueyuan Chen and Haomiao Zhu and Guochen Bao 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].",

year = "2018",

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doi = "10.1021/acs.jpca.8b01915",

language = "English",

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TY - JOUR

T1 - Electronic Spectra of Cs2NaYb(NO2)6

T2 - Is There Quantum Cutting?

AU - Luo, Yuxia

AU - Liu, Zhenyu

AU - Hau, Sam Chun-Kit

AU - Yeung, Yau Yuen

AU - Wong, Ka-Leung

AU - Shiu, Kwok Keung

AU - Chen, Xueyuan

AU - Zhu, Haomiao

AU - Bao, Guochen

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 - 2018/5/3

Y1 - 2018/5/3

N2 - The crystal structure and electronic spectra of the Th symmetry hexanitritoytterbate(III) anion have been studied in Cs2NaY0.96Yb0.04(NO2)6, which crystallizes in the cubic space group Fm3. The emission from Yb3+ can be excited via the NO2- antenna. The latter electronic transition is situated at more than twice the energy of the former, but at room temperature, one photon absorbed at 470 nm in the triplet state produces no more than one photon emitted. Some degree of quantum cutting is observed at 298 K under 420 nm excitation into the singlet state and at 25 K using excitation into either state. The quantum efficiency is ∼10% at 25 K. The energy level scheme of Yb3+ has been deduced from excitation and emission spectra and calculated by crystal field theory. New improved energy level calculations are also reported for the Cs2NaLn(NO2)6 (Ln = Pr, Eu, Tb) series using the f-Spectra package. The neat crystal Cs2NaYb(NO2)6 has also been studied, but results were unsatisfactory due to sample decomposition, and this chemical instability makes it unsuitable for applications. © 2018 American Chemical Society.

AB - The crystal structure and electronic spectra of the Th symmetry hexanitritoytterbate(III) anion have been studied in Cs2NaY0.96Yb0.04(NO2)6, which crystallizes in the cubic space group Fm3. The emission from Yb3+ can be excited via the NO2- antenna. The latter electronic transition is situated at more than twice the energy of the former, but at room temperature, one photon absorbed at 470 nm in the triplet state produces no more than one photon emitted. Some degree of quantum cutting is observed at 298 K under 420 nm excitation into the singlet state and at 25 K using excitation into either state. The quantum efficiency is ∼10% at 25 K. The energy level scheme of Yb3+ has been deduced from excitation and emission spectra and calculated by crystal field theory. New improved energy level calculations are also reported for the Cs2NaLn(NO2)6 (Ln = Pr, Eu, Tb) series using the f-Spectra package. The neat crystal Cs2NaYb(NO2)6 has also been studied, but results were unsatisfactory due to sample decomposition, and this chemical instability makes it unsuitable for applications. © 2018 American Chemical Society.

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U2 - 10.1021/acs.jpca.8b01915

DO - 10.1021/acs.jpca.8b01915

M3 - RGC 21 - Publication in refereed journal

C2 - 29641197

SN - 1089-5639

VL - 122

SP - 4381

EP - 4388

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 17

ER -