We apply room-temperature nanoimprint lithography to rare-earth metallo-organic complexes, for patterning 600 nm period gratings onto europium-based 612 nm light-emitting compounds. After patterning, an increase of up to 6.2 times of the integrated photoluminescence emitted around Theta=35degrees was observed, resulting from the combination of the effective Bragg scattering induced by the printed grating, with the very narrow-linewidth emission of the metallo-organic complexes. These results are quite promising for the realization of nanoimprinted rare-earth-based optoelectronic devices, such as light-emitting diodes and displays, and distributed feedback elements. (C) 2004 American Vacuum Society.