DataVXACS Applied Materials & InterfacesPaper
journal article·2023-09-20Open access

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

ACS Applied Materials & Interfaces· Volume 15· Issue 37
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Abstract

Undoped Y 2 Ti 2 O 7 exhibits impurity emission bands at low temperatures due to Mn 4+ and Cr 3+, 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 Bi 3+ emission in this codoped host, as also is the case for Fe 3+ . The emission reported in that paper as being due to Bi 3+ in fact corresponds to Cr 3+ emission. The Cr 3+ and Mn 4+ emissions are quenched with increasing temperature, so that Mn 4+ emission is scarcely observed above 80 K. We present variable temperature optical data for Y 2 Ti 2 O 7 and this host codoped with Mn, Cr, Fe, and Bi, as well as a theoretical justification of our results.
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Research context

OpenAlex topics: Luminescence Properties of Advanced Materials · Electronic and Structural Properties of Oxides · Perovskite Materials and Applications

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Affiliations

Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong 999077, Hong Kong S. A. R., P. R. China

CAS Key Laboratory of Microscale Magnetic Resonance, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, P. R. China

CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, P. R. China

Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong S. A. R., P. R. China

Funding

Research Grants Council, University Grants Committee · National Natural Science Foundation of China · Chinese University of Hong Kong

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