Optoelectronic study of CdS thin films ultrasonically intercalated by silver nanoparticles.

Thin films of CdS were prepared by simple, cost effective chemical bath deposition (CBD) technique. As grown thin films were annealed from 100-400°C for 1 h and characterized to obtain optimized annealing temperature (300°C) for optoelectronic properties. Silver nanoparticles were then synthesized using AgNO3 as a source of Ag+ ions. These Ag nanoparticles were then ultrasonically intercalated into the 300°C annealed CdS thin films using different sonication time. The optoelectronic characteristics of these thin films were then studied. The optical spectra revealed, the absorption over a wide wavelength range was enhanced significantly in the near IR region. Resistivity of the thin films was measured using two probe method and it was found to be decreased. [ABSTRACT FROM AUTHOR]