Oriented films of poly(9,9-dioctylfluorene) (PFO) are produced by the friction transfer technique and exposed to saturated toluene vapor for formation of the metastable beta-phase PFO. To obtain white polarized emission, the orange-emitting alpha-sexithiophene (6T) is deposited on top of these blue-emitting oriented PFO layers. We studied the effects of the thickness of the 6T layer as well as the PFO conformation (beta-phase PFO vs. N-phase PFO) on the color and polarization of the emission. Photoluminescence results show that whitening of the emission is possible by depositing a 6T layer as thin as 0.15 nm on PFO. The intensity of the 6T emission region decreases with increasing 6T film thickness from 0.15 to 4.5 nm, but as a general trend the emission is stronger for 6T on beta-phase than on N-phase PFO. Very good polarization of both PFO and 6T emitting regions suggests that the 6T molecules are oriented parallel to the orientation of the underlying PFO layer. (C) 2013 Elsevier B.V. All rights reserved.