Publication de Romain Parize 2017

Ici  vous trouverez le papier de Romain Parize

"Sb₂S₃ thin films grown by chemical bath deposition have received increasing interest for its integration into solar cells. However, its crystallization by post-deposition annealing represents a major difficulty owing to its instability at relatively low temperature. We combine in situ Raman scattering at very low laser power with in situ X-ray diffraction over a broad range of annealing temperatures and durations under N₂ atmosphere to elucidate its crystallization process on anatase-TiO₂ layers. The thermally activated crystallization is found to systematically involve the intermediate formation of a metallic Sb phase and very often of a senarmontite cubic Sb₂O₃ phase, both of them vanishing prior to the formation of the stibnite Sb₂S₃ phase. Compact and continuous 150 nm-thick Sb₂S₃ thin films with no pyramid-shaped clusters on their top surface are crystallized in the range of 240 to 270 °C, namely below the commonly used annealing temperature of 300 °C. Their texture is tunable from (420) and (520) to (020) and (200) planes parallel to the surface by raising the annealing temperature owing to a process of abnormal grain growth. The Sb₂S₃ thin films crystallized at the optimal annealing temperature of 270 °C are composed of dense crystallites with a typical size of several tens of nanometers, which is of high interest for their integration into solar cells."

http://dx.doi.org/10.1016/j.matdes.2017.02.034