Abstract
We report the growth of thin films of ternary metal chalcogenide Ag3SbS3. The growth involves two steps: (1) Ag3SbS3 nanoparticles were synthesized using the hydrothermal method; (2) a post-annealing process transformed the Ag3SbS3 nanoparticles into Ag3SbS3 films. The best Ag3SbS3 nanoparticles were obtained with the hydrothermal reaction temperature of 140°C for 12h. The formation of Ag3SbS3 films is sensitive to the annealing temperature and the best films were produced at 440°C. The XRD pattern reveals the Ag3SbS3 single phase. The prepared Ag3SbS3 film has a smooth, uniform surface with a medium particle size of ~200nm. Optical absorption reveals an energy gap of 1.8eV and a large absorption coefficient of 2.1×105cm−1 at λ=400nm. The large optical absorption suggests that Ag3SbS3 films could be a potential solar cell material. Compared to the laser technique used formally, the present growth method is simpler, lower cost and able to produce high-quality Ag3SbS3 films.
Published Version
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