The present invention provides for a polymer comprising a .pi.-conjugated backbone comprising a furan. The polymer has a narrow or low band gap and/or is solution processable. In some embodiments, the polymer is PDPP2FT or PDPP3F. The present invention also provides for a device comprising the polymer, such as a light-emitting diode, thin-film transistor, chemical biosensor, non-emissive electrochromic, memory device, photovoltaic cells, or the like.
STATEMENT OF GOVERNMENTAL SUPPORT
 The invention was made with government support under Contract Nos. DE-AC02-05CH11231 awarded by the U.S. Department of Energy. The government has certain rights in the invention.