Morphological change of a PbSe film grown by chemical bath deposition during sensitization

Abstract

A PbSe film was grown by chemical bath deposition on a thermally oxidized Si (111) substrate. Morphological change of the PbSe film during sensitization under the oxygen and iodine atmospheres was studied by SEM. The as-grown polycrystalline PbSe film consists of clusters of about 200nm in diameter. By the oxidation treatment for 30 min at 380'C, the clusters became joined together. On the other hand, recrystallization of new PbSe crystals with faceted surfaces occurred during the iodination treatment under an iodine plus nitrogen atmosphere at 380'C for different durations. This morphological change during the sensitization treatment might affect the electro-optical properties of the PbSe film. ？ 2015 Materials Research Society.