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Quenching Cooperative Transitions by destroying Yb3+-clusters


Our previous work reported cooperative luminescence of Yb3+-trimers and cooperatively sensitized Gd3+ luminescence by Yb3+-tetramers in doped CaF2 host. In this work, we experimentally observed an unusual luminescent phenomenon of Gd3+ in CaF2:Yb3+/Gd3+. Upon excitation with a 980 nm laser, the upconversion luminescence of Gd3+ increases first and then decreases in the Gd3+ concentration range of 0-0.9 mol%, which is different from the monotonic increase of Gd3+ luminescence observed in the downconversion spectra by direct excitation of Gd3+. This special luminescent behavior is indicated to relate to energy transfer from Yb3+-tetramers to Gd3+ and destruction of Yb3+-clusters. Here, we proposed a new luminescence quenching mechanism, Yb3+-cluster destructive quenching, which is verified by fluorescence dynamic analysis and optically inactive rare earth ion doping experiment.

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Publication details

The article was received on 16 Mar 2017, accepted on 18 Apr 2017 and first published on 18 Apr 2017

Article type: Communication
DOI: 10.1039/C7CP01678F
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Quenching Cooperative Transitions by destroying Yb3+-clusters

    J. Guo, T. Aidilibike, W. Di, Y. Li, X. Liu and W. Qin, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP01678F

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