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Title: Composite system based on CdSe/ZnS quantum dots and GaAs nanowires

The possibility of fabricating a composite system based on colloidal CdSe/ZnS quantum dots and GaAs nanowires is demonstrated and the structural and emission properties of this system are investigated by electron microscopy and photoluminescence spectroscopy techniques. The good wettability and developed surface of the nanowire array lead to an increase in the surface density of quantum dots and, as a consequence, in the luminosity of the system in the 600-nm wavelength region. The photoluminescence spectrum of the quantum dots exhibits good temperature stability in the entire range 10-295 K. The impact of surface states on energy relaxation and the role of exciton states in radiative recombination in the quantum dots are discussed.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2] ;  [1] ;  [4] ;  [1]
  1. St. Petersburg Academic University-Nanotechnology Research and Education Center, Russian Academy of Sciences (Russian Federation)
  2. St. Petersburg State University, Fock Institute of Physics (Russian Federation)
  3. Max-Planck-Institut fuer Mikrostukturphysik (Germany)
  4. Vavilov State Optical Institute (Russian Federation)
  5. Belarussian State University, Institute for Physicochemical Problems (Belarus)
Publication Date:
OSTI Identifier:
22210490
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 47; Journal Issue: 10; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; CADMIUM SELENIDES; ELECTRON MICROSCOPY; GALLIUM ARSENIDES; LUMINOSITY; PHOTOLUMINESCENCE; QUANTUM DOTS; QUANTUM WIRES; SPECTRA; SPECTROSCOPY; SURFACES; WAVELENGTHS; ZINC SULFIDES