NOVELTY - Method for synthesizing silver powder particles involves preparing acidic aqueous silver salt solution, preparing acidic aqueous reducing and particle modifier solution, maintaining the acidic aqueous silver salt solution and acidic reducing and particle modifier solution at 10-65 degrees C, adding the acidic aqueous silver salt solution to the acidic aqueous reducing and particle modifier solution to make reaction mixture and maintaining the temperature of the reaction mixture at 10-65 degrees C, and increasing the temperature of the final aqueous solution to 65-80 degrees C while continuing stirring.    USE - The method is useful for synthesizing silver powder particles used in silver thick film paste which is used in solar cell (all claimed). The silver powder particles are useful in electronic applications.    ADVANTAGE - The method synthesizes spherically-shaped silver powder particles having small crystallites of 30-47 nm in size as determined by X-ray diffraction and Scherrer formula, average particle diameter (d50) of 0.5-3.5 mu m to provide thick film paste with improved sintering properties, size distribution such that (d90-d10)/d50 is less than 2.2, solids content in excess of 99% as determined by thermogravimetric analysis and high dispersible nature, and does not utilize any complexing agents that cause side reactions and affect reduction and type of particles produced.    DETAILED DESCRIPTION - Method for making silver powder particles involves (a) preparing acidic aqueous silver salt solution comprising water soluble silver salt dissolved in deionized water, (b) preparing acidic aqueous reducing and particle modifier solution comprising (i) reducing agent chosen from ascorbic acid, ascorbates and their mixture dissolved in deionized water, (ii) nitric acid, (iii) gum arabic, (iv) maleic acid, and (v) deionized water, (c) maintaining the acidic aqueous silver salt solution and acidic reducing and particle modifier solution at same temperature of 10-65 degrees C while stirring each solution during and after preparation, (d) adding the acidic aqueous silver salt solution to the acidic aqueous reducing and particle modifier solution while stirring to make reaction mixture and maintaining the temperature of the reaction mixture at 10-65 degrees C, where the silver powder particles precipitate and are contained within the resulting final aqueous solution, and (e) increasing the temperature of the final aqueous solution to 65-80 degrees C while continuing stirring. An INDEPENDENT CLAIM is included for solar cell.