One-step synthesis of Pt nanoparticles incorporated direct-patternable SnO₂ nanocomposite thin films

The effects of the incorporation of one-step synthesized Pt nanoparticles on the crystallinity as well as optical and electrical properties of direct-patternable SnO₂ thin films using a photosensitive additive were investigated. As the heating time increased, the color of the one-step synthesis solution changed from transparent to black due to the formation of Pt nanoparticles. The optical transmittance of the films was not affected as the heating time was increased. However, the crystallinity of the films increased with increasing heating time. In addition, the resistivity decreased because Pt nanoparticles were synthesized during the long solution heating time and the reduction of SnO₂ progressed. One-step synthesis of Pt nanoparticles enhanced the electrical properties of direct-patternable SnO₂ thin films without significantly degrading their structural and optical properties. Direct-patterning of SnO₂ thin films after spin coating was successfully performed with a line-width of 30μm.