Room-temperature green upconversion luminescence in LaMgAl11O19:Mn2+, Yb3+ upon infrared excitation

Martín-Rodríguez, R.; Valiente, R.; Bettinelli, M.
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p091913
Academic Journal
We present a spectroscopic study of the green upconversion luminescence of Mn2+ upon near infrared Yb3+ excitation in LaMgAl11O19 codoped with manganese and ytterbium. Excitation at 975 nm with a diode laser resonant with the 2F7/2→2F5/2 Yb3+ transition induces a broad emission band centered at 514 nm and assigned to the 4T1→6A1 transition of tetrahedral Mn2+. The upconversion luminescence can be seen by the naked eye up to 500 K. This finding is a promising step in order to use the Mn2+–Yb3+ system as a potential candidate for display phosphors by upconversion.


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