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A universal approach for calculating Judd-Ofelt parameters of RE3+ in powdered phosphors and its application for β-NaYF4:Er3+/Yb3+ phosphor derived from auto-combustion assisted fluoridation

Abstract

It is difficult to calculate the Judd-Ofelt (J-O) parameters for trivalent rare earth (RE) doped powders due to the unavailable absorption spectrum which is necessarily used in the conventional J-O calculation procedure. In this work, a universal method starting from the diffuse-reflection spectrum for calculating J-O parameters of RE3+ doped powdered samples was proposed. In this proposed method, by taking Kubelka-Munk function into account the absorption cross section spectrum was derived from the diffuse-reflection spectrum in RE3+ doped powdered sample by using the connection between the absorption cross section and the radiative transition rate of RE3+. Then the J-O parameters might be calculated from the absorption cross section spectrum via the traditional J-O calculation technique. The NaYF4:Er3+/Yb3+ and NaYF4:Er3+ phosphors were prepared via an auto-combustion assisted fluoridation technique, and the J-O calculation was carried out for the obtained samples. The obtained J-O parameters were compared with those reported in literatures, and were also verified by comparing the calculated radiative transition lifetimes with their experimental values. Finally, it was deduced that the proposed J-O calculation route is practicable.

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Publication details

The article was received on 11 Apr 2018, accepted on 17 May 2018 and first published on 18 May 2018


Article type: Paper
DOI: 10.1039/C8CP02317D
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    A universal approach for calculating Judd-Ofelt parameters of RE3+ in powdered phosphors and its application for β-NaYF4:Er3+/Yb3+ phosphor derived from auto-combustion assisted fluoridation

    Y. Zhang, B. Chen, S. Xu, X. Li, J. Zhang, J. sun, X. Zhang, H. Xia and R. Hua, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C8CP02317D

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