Matrix role in Ge nanoclusters embedded in Si3N4 or SiO2 (Articolo in rivista)

Type
Label
  • Matrix role in Ge nanoclusters embedded in Si3N4 or SiO2 (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4734395 (literal)
Alternative label
  • S. Mirabella, S. Cosentino, A. Gentile, G. Nicotra, N. Piluso, L.V. Mercaldo, F. Simone, C. Spinella, A. Terrasi (2012)
    Matrix role in Ge nanoclusters embedded in Si3N4 or SiO2
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Mirabella, S. Cosentino, A. Gentile, G. Nicotra, N. Piluso, L.V. Mercaldo, F. Simone, C. Spinella, A. Terrasi (literal)
Pagina inizio
  • 011911 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 101 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Univ Catania, CNR IMM MATIS, I-95123 Catania, Italy [ 2 ] Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, Italy [ 3 ] CNR IMM, I-95121 Catania, Italy [ 4 ] ENEA Portici Res Ctr, I-80055 Portici, NA, Italy (literal)
Titolo
  • Matrix role in Ge nanoclusters embedded in Si3N4 or SiO2 (literal)
Abstract
  • Ge nanoclusters (NCs), synthesized by ion implantation and annealing up to 900 degrees C, result small (similar to 2 nm) and amorphous in Si3N4, crystalline and much larger in SiO2. The NCs ripening and crystallization kinetics in Si3N4 is retarded by larger interfacial energy and lower diffusivity of Ge in comparison to SiO2. Ge NCs absorb light more efficiently when embedded in Si3N4 than in SiO2. A significant effect of the barrier height on absorption was evidenced, in agreement with effective mass theory predictions. The smaller bandgap of Ge NCs embedded in Si3N4 and their closeness is promising features for light harvesting applications. (literal)
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