NOVELTY - Forming a solar cell conductive feature involves a) direct printing a precursor composition comprising at least one of metallic particles comprising a metal or a metal precursor compound to the metal; and b) heating the precursor composition to form the solar cell conductive feature on the substrate, where the solar cell conductive feature has a feature width of not greater than 200 microns, a thickness of greater than 2 microns, and a conductivity of not less than 10% of the conductivity of the equivalent pure metal.    USE - For forming a solar cell conductive feature on a substrate (claimed); for fabrication of electronic features such as conductors, resistors, inductors and capacitors; for fabricating antennas such as antennas used for cellular telephones; for direct printings of electrical connectors as well as antennae of smart tags, smart labels, and a wide range of identification devices such as radio frequency identification (RFID) tags.    ADVANTAGE - The method enables the production of highly pure dielectric features with low porosity, or fully dense composite layers with a dielectric constant of up to 500; and it enables the deposition of very thin dielectric layers. The precursor composition has low conversion temperature and which enable low-temperature treatment of the precursors to form electronic features on a variety of substrates. The compositions can deposited into recessed features, such as trenches, formed in a substrate and are reacted at a low temperature to form electrical features having good electrical and mechanical properties. The precursor compositions have a wide range of properties and a wide range of relative cost. In high volume applications that do not require well-controlled properties, inexpensive precursor compositions can be deposited on cellulose-based materials, such as paper, to form simple disposable circuits. The compositions can be utilized to form complex and high precision circuitry having good electrical properties. The heating time is also very short. The composition can produce features that have good adhesion to the substrates on which they are formed. The composition enables the use of low cost deposition techniques, such as ink-jet printing, for depositing components. It also enables the low cost, high volume, highly customizable production of electronic labels. It provides production of solar cells with simplicity, automation and low production cost. It does not generate any waste. The printing methods are a single step direct printing process and are compatible with small-batch and rapid turn around production runs.