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A novel optical temperature sensor based on Boltzmann function in BiZn2PO6 phosphor

In this paper, a new scheme of optical temperature measurement based on Boltzmann function is reported for the first time. The BiZn2PO6 and BiZn2PO6:Eu3+ phosphors with strong host emission intensity were investigated from the perspective of crystal structure, electronic band structure, phonon distr...

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Bibliographic Details
Published in:Journal of luminescence 2023-03, Vol.255, p.119562, Article 119562
Main Authors: Ran, Weiguang, Zhang, Zicheng, Ma, Xiaoli, Sun, Guangshi, Yan, Tingjiang
Format: Article
Language:English
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Summary:In this paper, a new scheme of optical temperature measurement based on Boltzmann function is reported for the first time. The BiZn2PO6 and BiZn2PO6:Eu3+ phosphors with strong host emission intensity were investigated from the perspective of crystal structure, electronic band structure, phonon distribution, and fluorescence properties. By exploring the relationship between host emission intensity and temperature, or between fluorescence lifetime and temperature, a novel optical temperature sensor based on Boltzmann function was designed. With this scheme, the performance of the optical temperature sensors can be visualized in the fitting results of Boltzmann function. The absolute sensitivity of the optical temperature sensor designed based on this function reaches a maximum value Sa=14dT at T0, while relative sensitivity is 12dT. For example, in BiZn2PO6 phosphor, the absolute and relative sensitivities reached 0.88% and 1.78% at 260 K. Therefore, the new optical temperature sensor based on Boltzmann function provides the theoretical basis and practical experience for the development of high-sensitivity non-contact optical temperature sensor. •Pure BiZn2PO6 and Eu3+ doped phosphors with strong host emission were prepared.•The variation of emission intensity and lifetime as a function of ambient temperature follows the Boltzmann distribution.•The Sr and Sa of the optical temperature sensors can be visualized in the fitting results.•Strong red emission can be used as a reference to assist in temperature measurement.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2022.119562