NOVELTY - Forming a photovoltaic conductive feature involves printing a precursor composition onto a substrate, where composition comprises at least one of metallic nanoparticles containing a metal or a metal precursor compound to the metal; and heating the composition to temperature not greater than 300degrees C to form the photovoltaic conductive feature on the substrate. The conductive feature comprises a set of finger lines and collector lines deposited at a right angle to the finger lines, or a transparent conductive feature (preferably indium-tin oxide or antimony-tin oxide).    USE - For forming photovoltaic conductive feature such as solar cell conductive feature (claimed) and conductive electronic features.    ADVANTAGE - The conductive feature has a thickness greater than 1 mu m (preferably greater than 5 mu m); and a resistivity not greater than 4 (preferably not greater than 2) times the resistivity of the bulk conductor. The conductivity of the conductive feature is not less than 10% the conductivity of the equivalent pure metal. The precursor composition used in the method has a low conversion temperature to enable low-temperature treatment of the precursors to form conductive electronic features on a variety of substrates. The conductive feature is resistant to solder leaching; has high conductivity; has high resistance to electromigration and oxidation; and has good adhesion to the substrate. The conductive electronic features formed by the method have good electrical properties such as resistivity not greater than 20 times the resistivity of the bulk conductor. The precursor composition used in the method has low viscosity enabling deposition using direct-write tools; and has low conversion temperature enabling the deposition and conversion to electrical feature on low temperature substrates.    DETAILED DESCRIPTION - Forming a photovoltaic conductive feature involves printing a precursor composition onto a substrate, where the composition comprises at least one of metallic nanoparticles containing a metal or a metal precursor compound to the metal; and heating the precursor composition to temperature not greater than 300degrees C to form the photovoltaic conductive feature on the substrate. The precursor composition is deposited on the substrate in a lithographic printing process, a gravure printing process, flexo printing process, screen printing process, photo-patterning printing process, by a drop on demand printing process or in an ink jet printing process; or in a roll printing process, in a non-contact printing process or in an electrostatic printing process. The conductive feature comprises a set of finger lines and collector lines deposited at a right angle to the finger lines, or a transparent conductive feature (preferably indium-tin oxide or antimony-tin oxide).