Enhancement of synthetic speed of Ag nanoparticle for electrodes of solar cells by using microwave radiation

In this study, compared to the conventional wet synthesis method, microwave radiation enhanced the synthesis speed of silver (Ag) nanoparticles for electrode of silicon (Si)-based solar cells by over 1,000 times. Especially, contrary to previous studies, no catalyst was used for precipitation of the Ag nanoparticles. In addition, although the synthesis speed was increased, the sizes of Ag nanoparticles were increased by less than 10 nm, and they were well dispersed in an ink solvent system. The electrical resistance of a 200-nm-thick Ag-coated layer was about 28. 5 μΩcm after heat treatment at 300 °C.