This study examines the influence of platinum nanoparticles on plasmonenhanced photoluminescence in films prepared from semiconductor zinc oxide nanocrystals. Metal nanoparticles with different average sizes from 48 to 82 nm were synthesized by a gas discharge method with additional in-flow heat treatment at 985 °C and deposited by dry aerosol printing on quartz glass followed by ZnO film fabrication. The relationship between the size of nanoparticles processed in the tube furnace and the working gas flow rate as well as the correlation between the enhancement factor of ZnO ultraviolet photoluminescence and the size of the Pt nanoparticles were established. A relationship between the photoluminescence enhancement factor and layers’ configuration in nanostructures was also found. Theoretical calculations were also performed to determine the effects of plasmonic enhancement of ZnO photoluminescence.