Electrochemical Deposition of Bi[sub 2]S[sub 3] Thin Films Using Dimethylsulfoxide as a Solvent

thin films with different morphology and crystallite size were electrodeposited on conducting glass substrates from a dimethylsulfoxide solution of bismuth chloride and elemental sulfur at various temperatures. Porous films, constituted of open-packed nanoparticles , were obtained at low temperature . Dense films were obtained in the temperature range of . They were formed of larger close-packed nanocrystals arranged in columnar agglomerates. Electrodeposition at higher temperatures resulted in open-packed large nanocrystals that constitute a microstructured film. The stoichiometry of the films was confirmed by chemical analysis. However, X-ray diffraction indicated distortions in lattice. Deposition temperature was found to influence the distortion, with the smallest distortion observed for the highest temperature . Optical gaps in the range were estimated for the obtained films. The influence of the morphology and structural defects on the optical properties of films was also discussed.