Observatorio de I+D+i UPM

Memorias de investigación
Ponencias en congresos:
Electrical, photoelectrical and morphological properties of ZnO nanowire networks grown on SiO2 and on Si
Año:2012
Áreas de investigación
  • Física,
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
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
Internacional
Si
Nombre congreso
The 5th Latin American Conference on Metastable and Nanostructured Materials
Tipo de participación
960
Lugar del congreso
Sao Paulo, Brasil
Revisores
Si
ISBN o ISSN
1516-1439
DOI
Fecha inicio congreso
30/09/2011
Fecha fin congreso
02/10/2011
Desde la página
1
Hasta la página
6
Título de las actas
Materials Research (onliine) http://www.scielo.br/scielo.php?pid=S1516-14392013005000030&script=sci_arttext
Esta actividad pertenece a memorias de investigación
Participantes
  • 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)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Conectividad
  • Departamento: Tecnología Electrónica
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