Two silole monomers 1-methyl-1-phenyl-3,4-diphenyl-2,5-bis(4-bromophenyl)silole and 1-methyl-1-phenyl-3,4-diphenyl-2,5-bis(5-bromo-2-thienyl)silole with a phenyl substitution on the silicon atom were successfully prepared via one-pot synthesis routes with methyl-phenyl-bis(phenylethynyl)silane as the starting material.Two series of random and alternating silole-containing polyfluorenes were synthesized by incorporating the two siloles individually in Suziki coupling reactions,from which their performances in polymeric light-emitting diodes that show green-and red-light emissions were evaluated.Maximum extemal quantum efficiencies of 1.2 and 1.8% were achieved from the green-and red-light emissions,respectively.White-light electroluminescence (EL) with relatively balanced simultaneous red,green,and blue emissions were demonstrated by incorporation of the two siloles directly conjugated on the blue-emissive polyfluorene backbone.The white-light EL device displays maximum luminous efficiency of 2.01 cdA-1 for a brightness of 338 cd/m2 and the device also holds a luminous efficiency of 1.86 cd/A for a higher brightness of 2703 cd/m2.The device shows stable CIE coordinates of (0.33,0.36).