Highly luminescent CdSe nanocrystalline films prepared by chemical bath deposition

• Published in: Journal of crystal growth 2006-06, Vol.292 (1), p.78-86
• Main Authors: Němec, P., Šimurda, M., Němec, I., Sprinzl, D., Formánek, P., Malý, P.
• Format: Article
• Language: English
• Subjects: A1. Characterisation; A1. Nanostructures; A1. Photoluminescence; A3. Chemical bath deposition; B2. Semiconducting cadmium compounds; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Ii-vi semiconductors; Materials science; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Photoluminescence; Physics
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2006.03.057

We report on the preparation of high-quality CdSe nanocrystalline films with a strongly enhanced photoluminescence efficiency and carrier lifetime. This substantial improvement of the properties of the prepared films was accomplished by a modification of the chemical bath deposition preparation procedure. The characteristics of the prepared films were investigated in detail by measuring their optical properties, structural morphology and chemical composition. The changes induced by the modification of the preparation were interpreted in terms of a passivation of nonradiative decay channels in individual nanocrystals forming the films.