Abstract: The present invention provides a method of producing a nanocomposite film on a substrate. The method involves co-deposition of gaseous lead salt clusters in a conducting polymer film, such as a conductive polythiophene, on the substrate. The polymer film preferably is simultaneously deposited with the lead salt clusters, e.g., by co-depositing organic monomers and/or oligomers onto the substrate in the presence of gaseous lead salt clusters. Preferred lead salts are PbS, PbTe and PbSe. Devices and articles of manufacture including a nanocomposite film of the invention are also disclosed.