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Abnormally heat-enhanced Yb excited state lifetimes in Bi7F11O5 nanocrystals and the potential applications in lifetime luminescence nanothermometry

Abstract

A heating-induced monotonous increase in Yb3+ excited state (2F5/2) lifetimes is found in Yb3+ single doped Bi7F11O5 nanocrystals, possibly caused by the thermal-enhanced photocarrier separation in polarized layered semiconductors with spontaneous internal electric fields. This unique phenomenon is evaluated for its thermometric performance in terms of lifetime luminescence thermometry, and the maximum absolute/relative temperature sensitivity (Sa/Sr) reaches a high of 0.65 μs K−1/0.24% K−1 in biological temperature regions. The results of this work can offer great potential for lifetime luminescence thermometry in biological areas and provide ideas for designing efficient photonic and photoelectric thermal devices.

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Publication details

The article was received on 09 Aug 2019, accepted on 08 Oct 2019 and first published on 11 Oct 2019


Article type: Paper
DOI: 10.1039/C9TC04378K
J. Mater. Chem. C, 2019, Accepted Manuscript

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    Abnormally heat-enhanced Yb excited state lifetimes in Bi7F11O5 nanocrystals and the potential applications in lifetime luminescence nanothermometry

    T. Wang, T. Xiao, Y. Fan, F. He, Y. Li, Y. Peng, Q. Wang, Z. Yin, Z. Yang, J. Qiu and Z. Song, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC04378K

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