Sensitization of the Blue-green Electroluminescence by Gadolinium Coupled to Si Nanocluster Embedded in a SiO2 Matrix

  • Slawomir PRUCNAL Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf / Institute of Physics, Maria Curie Sklodowska University in Lublin
  • Lars REBOHLE Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf
  • JM SUN Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf
  • Wolfgang SKORUPA Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf
  • Andrzej DROŹDZIEL Institute of Physics, Maria Curie Sklodowska University in Lublin
  • Krzysztof PYSZNIAK Institute of Physics, Maria Curie Sklodowska University in Lublin
  • Marcin Turek Institute of Physics, Maria Curie Sklodowska University in Lublin
  • Janusz FILIKS Institute of Physics, Maria Curie Sklodowska University in Lublin
  • Jerzy ŻUK Institute of Physics, Maria Curie Sklodowska University in Lublin
Keywords: electroluminescence, Gd, Si-nanocrystals, MOSLED, energy transfer

Abstract

In this work an enhancement of the blue and green electroluminescence (EL) related to silicon inclusions into SiO2 layer by gadolinium co-doping was investigated. The blue (460 nm) and green (550 nm) EL corresponds to the oxygen-deficient-centres (ODC) and Si nanoclusters with average diameter below 1 nm, respectively. After gadolinium co-doping a fourfold increase of the total EL intensity was observed. It was found that the increase of the blue and green EL is due to the energy transfer from Gd3+ ions to the ODC defects and amorphous silicon nanoclusters. Moreover, the gadolinium co-doping increases the concentration of the small silicon nanoclusters.

DOI: http://dx.doi.org/10.5755/j01.ms.19.2.1789

Published
2013-05-23
Section
ELECTRONIC AND OPTICAL MATERIALS