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^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › 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
Early online date	11 Sept 2023
DOIs	https://doi.org/10.1021/acsami.3c11758
Publication status	Published - 20 Sept 2023

Scopus Subject Areas

General Materials Science

User-Defined Keywords

Mn4+ emission
Cr3+ emission
Fe3+ emission
impurity emission
pyrochlore
Bi3+ doping

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsami.3c11758

Cite this

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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 = "Mn4+ emission, Cr3+ emission, Fe3+ emission, impurity emission, pyrochlore, Bi3+ doping",

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

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

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doi = "10.1021/acsami.3c11758",

language = "English",

volume = "15",

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TY - JOUR

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 - Mn4+ emission

KW - Cr3+ emission

KW - Fe3+ emission

KW - impurity emission

KW - pyrochlore

KW - Bi3+ doping

UR - http://www.scopus.com/inward/record.url?scp=85171900283&partnerID=8YFLogxK

U2 - 10.1021/acsami.3c11758

DO - 10.1021/acsami.3c11758

M3 - Journal article

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SN - 1944-8244

VL - 15

SP - 43226

EP - 43233

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

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ER -