Polyfluorene with p-carborane in the backbone was synthesized from the new monomer 1,12-bis(7-bromo-9,9-dihexyl-9H-fluoren-2-yl)-closo-1,12-dicarbodecaborane to give a high MW, soluble, blue-emitting material characterized by NMR, UV-vis, and fluorescence spectroscopy.