Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Electrical, photoelectrical and morphological properties of ZnO nanowire networks grown on SiO2 and on Si
Year:2012
Research Areas
  • Phisics,
  • Electronic technology and of the communications
Information
Abstract
ZnO nanofibre networks (NFNs) were grown by vapour transport method on Si-based substrates. One type of substrate was SiO2 thermally grown on Si and another consisted of a Si wafer onto which Si nanowires (NWs) had been grown having Au nanoparticles catalysts. The ZnO-NFN morphology was observed by scanning electron microscopy on samples grown at 600 °C and 720 °C substrate temperature, while an focused ion beam was used to study the ZnO NFN/Si NWs/Si and ZnO NFN/SiO2 interfaces. Photoluminescence, electrical conductance and photoconductance of ZnO-NFN was studied for the sample grown on SiO2. The photoluminescence spectra show strong peaks due to exciton recombination and lattice defects. The ZnO-NFN presents quasi-persistent photoconductivity effects and ohmic I-V characteristics which become nonlinear and hysteretic as the applied voltage is increased. The electrical conductance as a function of temperature can be described by a modified three dimensional variable hopping model with nanometer-ranged typical hopping distances
International
Si
Congress
The 5th Latin American Conference on Metastable and Nanostructured Materials
960
Place
Sao Paulo, Brasil
Reviewers
Si
ISBN/ISSN
1516-1439
Start Date
30/09/2011
End Date
02/10/2011
From page
1
To page
6
Materials Research (onliine) http://www.scielo.br/scielo.php?pid=S1516-14392013005000030&script=sci_arttext
Participants
  • Autor: Nadia Celeste Vega (U. Tucumán)
  • Autor: Monica Tirado (U. Tucumán)
  • Autor: David Comedi (U. Tucumán)
  • Autor: Andres Rodriguez Dominguez (UPM)
  • Autor: Tomas Rodriguez Rodriguez (UPM)
  • Autor: Gareth M. Hughes (U. Oxford)
  • Autor: Chris R. M. Grovenor (U. Oxford)
  • Autor: Fernando Audebert (U. Buenos Aires)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Conectividad
  • Departamento: Tecnología Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)