Comment on “Charge Transfer-Triggered Bi3+ Near-Infrared Emission in Y2Ti2O7 for Dual-Mode Temperature Sensing”

Hei Yui Kai; Longbing Shang; Ka Leung Wong; Chang Kui Duan; Peter A. Tanner

doi:10.1021/acsami.3c11758

Comment on “Charge Transfer-Triggered Bi³⁺ Near-Infrared Emission in Y₂Ti₂O₇ for Dual-Mode Temperature Sensing”

Hei Yui Kai, Longbing Shang, Ka Leung Wong, Chang Kui Duan, Peter A. Tanner

Research output: Journal article publication › Review article › Academic research › peer-review

4 Citations (Scopus)

Abstract

Undoped Y₂Ti₂O₇ exhibits impurity emission bands at low temperatures due to Mn⁴⁺ and Cr³⁺, as established by codoping with these ions. Contrary to a recent report by Wang et al., ACS Appl. Mater. Interfaces 2022, 14, 36834-36844, we do not observe Bi³⁺ emission in this codoped host, as also is the case for Fe³⁺. The emission reported in that paper as being due to Bi³⁺ in fact corresponds to Cr³⁺ emission. The Cr³⁺ and Mn⁴⁺ emissions are quenched with increasing temperature, so that Mn⁴⁺ emission is scarcely observed above 80 K. We present variable temperature optical data for Y₂Ti₂O₇ and this host codoped with Mn, Cr, Fe, and Bi, as well as a theoretical justification of our results.

Original language	English
Pages (from-to)	43226-43233
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	37
DOIs	https://doi.org/10.1021/acsami.3c11758
Publication status	Published - 20 Sept 2023

Keywords

Bi doping
Cr emission
Fe emission
impurity emission
Mn emission
pyrochlore

ASJC Scopus subject areas

General Materials Science

More information

10.1021/acsami.3c11758

Cite this

@article{469e4402b3134c399d7ed5b42cba1aff,

title = "Comment on “Charge Transfer-Triggered Bi3+ Near-Infrared Emission in Y2Ti2O7 for Dual-Mode Temperature Sensing”",

abstract = "Undoped Y2Ti2O7 exhibits impurity emission bands at low temperatures due to Mn4+ and Cr3+, as established by codoping with these ions. Contrary to a recent report by Wang et al., ACS Appl. Mater. Interfaces 2022, 14, 36834-36844, we do not observe Bi3+ emission in this codoped host, as also is the case for Fe3+. The emission reported in that paper as being due to Bi3+ in fact corresponds to Cr3+ emission. The Cr3+ and Mn4+ emissions are quenched with increasing temperature, so that Mn4+ emission is scarcely observed above 80 K. We present variable temperature optical data for Y2Ti2O7 and this host codoped with Mn, Cr, Fe, and Bi, as well as a theoretical justification of our results.",

keywords = "Bi doping, Cr emission, Fe emission, impurity emission, Mn emission, pyrochlore",

author = "Kai, {Hei Yui} and Longbing Shang and Wong, {Ka Leung} and Duan, {Chang Kui} and Tanner, {Peter A.}",

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T1 - Comment on “Charge Transfer-Triggered Bi3+ Near-Infrared Emission in Y2Ti2O7 for Dual-Mode Temperature Sensing”

AU - Kai, Hei Yui

AU - Shang, Longbing

AU - Wong, Ka Leung

AU - Duan, Chang Kui

AU - Tanner, Peter A.

PY - 2023/9/20

Y1 - 2023/9/20

N2 - Undoped Y2Ti2O7 exhibits impurity emission bands at low temperatures due to Mn4+ and Cr3+, as established by codoping with these ions. Contrary to a recent report by Wang et al., ACS Appl. Mater. Interfaces 2022, 14, 36834-36844, we do not observe Bi3+ emission in this codoped host, as also is the case for Fe3+. The emission reported in that paper as being due to Bi3+ in fact corresponds to Cr3+ emission. The Cr3+ and Mn4+ emissions are quenched with increasing temperature, so that Mn4+ emission is scarcely observed above 80 K. We present variable temperature optical data for Y2Ti2O7 and this host codoped with Mn, Cr, Fe, and Bi, as well as a theoretical justification of our results.

AB - Undoped Y2Ti2O7 exhibits impurity emission bands at low temperatures due to Mn4+ and Cr3+, as established by codoping with these ions. Contrary to a recent report by Wang et al., ACS Appl. Mater. Interfaces 2022, 14, 36834-36844, we do not observe Bi3+ emission in this codoped host, as also is the case for Fe3+. The emission reported in that paper as being due to Bi3+ in fact corresponds to Cr3+ emission. The Cr3+ and Mn4+ emissions are quenched with increasing temperature, so that Mn4+ emission is scarcely observed above 80 K. We present variable temperature optical data for Y2Ti2O7 and this host codoped with Mn, Cr, Fe, and Bi, as well as a theoretical justification of our results.

KW - Bi doping

KW - Cr emission

KW - Fe emission

KW - impurity emission

KW - Mn emission

KW - pyrochlore

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DO - 10.1021/acsami.3c11758

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