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Issue 27, 2013
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Temperature-tunable upconversion luminescence of perovskite nanocrystals KZnF3:Yb3+,Mn2+

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Abstract

Temperature-tunable intense yellow upconversion luminescence has been demonstrated in perovskite nanocrystals KZnF3:Yb3+,Mn2+ upon excitation with a 976 nm laser diode. The broad yellow luminescence band is centered at 585 nm and identified as the 4T1g(G) → 6A1g (S) transition of Mn2+. An upconversion luminescence mechanism based on exchange coupled Yb3+–Mn2+ dimer is proposed and the upconversion process consists of a sequence of ground state absorption (GSA)/excited-state absorption (ESA) steps. To understand thermal quenching behavior, temperature dependent upconversion luminescence of KZnF3:Yb3+,Mn2+ during heating and cooling cycles have been investigated. Results show the yellow upconversion luminescence can be seen by the naked eyes at temperatures up to 573 K and the thermal quenching is reversible. The intense yellow upconversion nanocrystals KZnF3:Yb3+,Mn2+ might find potential applications in the fields of lighting, temperature sensing, biomedical imaging and solid state lasers.

Graphical abstract: Temperature-tunable upconversion luminescence of perovskite nanocrystals KZnF3:Yb3+,Mn2+

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Publication details

The article was received on 10 Mar 2013, accepted on 03 May 2013 and first published on 03 May 2013


Article type: Paper
DOI: 10.1039/C3TC30450G
J. Mater. Chem. C, 2013,1, 4209-4215

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    Temperature-tunable upconversion luminescence of perovskite nanocrystals KZnF3:Yb3+,Mn2+

    E. Song, S. Ding, M. Wu, S. Ye, F. Xiao, G. Dong and Q. Zhang, J. Mater. Chem. C, 2013, 1, 4209
    DOI: 10.1039/C3TC30450G

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