The first example of a π-conjugated polymer incorporating boron difluoride (BF₂) formazanates is introduced. The film-forming properties, controllable reduction chemistry, and low optical band gap (ca. 1.4 eV) of the polymer make it an excellent candidate for use as a light-harvesting n-type semiconductor in organic electronics. Comparison of the polymer to model compounds confirmed that its unique optoelectronic properties can be directly attributed to the presence of the BF₂ formazanate repeat unit and that the [Pt(PBu₃)₂]²⁺ unit must also be present to achieve the narrow band gaps observed.