In this paper a novel method for synthesis of LaInO3 : Er<^>3+ is reported and upconversion luminescence properties of the synthesized material at different temperatures (9 - 300 K) are studied. The samples were prepared by co-precipitation and subsequent heat treatment of lanthanum, indium and erbium hydroxides. It is shown that the excitation at 980 nm leads to a strong green upconversion luminescence in the material. At the concentrations above 0,1 mol % of Er<^>3+ the energy transfer upconversion mechanism of the luminescence becomes evident.Further increase of Er<^>3+ content in the material leads to higher red-to-green upconversion luminescence intensityratio. The mechanisms responsible for the observed variation are discussed.

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