Electron localization in CdS nanocrystals studied by time-resolved terahertz spectroscopy
Measurement and Monte-Carlo simulations of THz photoconductivity spectra of CdS nanocrystalline films revealed a strong coupling between adjacent nanocrystals. Investigation of ultrafast dynamics provides information about initial sub-picosecond carrier cooling and subsequent carrier recombination.
Charge transport and localization in nanocrystalline CdS films: A time-resolved terahertz spectroscopy study
Z. Mics,1 H. Němec,1 I. Rychetský,1 P. Kužel,1,* P. Formánek,2 P. Malý,3 and P. Němec3 1Institute of Physics, Academy of Sciences of the Czech Republic, Prague, CZ-182 21, Czech Republic 2Institut für Strukturphysik, Technische Universität Dresden, D-01062 Dresden, Germany 3Faculty of Mathematics and Physics, Charles University in Prague, Prague, CZ-121 16, Czech Republic (Received 11 March 2011; published 28 April 2011)
Light-controlled growth of CdSe nanocrystalline films prepared by chemical deposition
Abstract We report on preparation of high quality thin films of CdSe nanocrystals by chemical solution deposition technique. The samples characterized by optical spectroscopy have the nanocrystal radii 1.9–10 nm. We demonstrated that the sizes of nanocrystals could be controlled by changing the intensity and/or the spectrum of light illumination of growing film.