Chemical bath deposition of CdSe and CdS nanocrystalline films: tailoring of morphology, optical properties and carrier dynamics

• Published in: Physica status solidi. A, Applications and materials science Applications and materials science, 2008-10, Vol.205 (10), p.2324-2329
• Main Authors: Němec, P., Šimurda, M., Němec, I., Formánek, P., Němcová, Y., Sprinzl, D., Trojánek, F., Malý, P.
• Format: Article
• Language: English
• Subjects: 68.55.−a; 72.25.Rb; 78.47.J; 78.67.Bf; 81.16.Be; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Nanocrystals and nanoparticles; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Physics
• ISSN: 1862-6300; 0031-8965; 1862-6319
• DOI: 10.1002/pssa.200779414

We review the results of our research towards tailoring morphology and optical properties of films consisting of closely‐spaced nanocrystals of CdSe and CdS whose optical band‐gap can be tuned to cover the whole visible spectral range. On basis of the obtained results, in particular of photoexcited carrier dynamics, we have proposed a microscopic model that describes well the optical properties of the films. We have also showed that the spin relaxation of electrons in these nanocrystalline films is different than that in mutually isolated nanocrystals of the same size. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)