The origin of highly efficient selective emission in rare-earth oxides for thermophotovoltaic applications (Articolo in rivista)

Type
Label
  • The origin of highly efficient selective emission in rare-earth oxides for thermophotovoltaic applications (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/nmat1197 (literal)
Alternative label
  • Torsello G, Lomascolo M, Licciulli A, Diso D, Tundo S, Mazzer M (2004)
    The origin of highly efficient selective emission in rare-earth oxides for thermophotovoltaic applications
    in Nature materials (Print); NATURE PUBLISHING GROUP,, LONDON (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Torsello G, Lomascolo M, Licciulli A, Diso D, Tundo S, Mazzer M (literal)
Pagina inizio
  • 632 (literal)
Pagina fine
  • 637 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.nature.com/nmat/journal/v3/n9/full/nmat1197.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 3 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Lecce, Dept Phys, I-73100 Lecce, Italy; Univ Lecce, CNR, IMM, I-73100 Lecce, Italy; Univ Lecce, Dept Engn, I-73100 Lecce, Italy (literal)
Titolo
  • The origin of highly efficient selective emission in rare-earth oxides for thermophotovoltaic applications (literal)
Abstract
  • Rare-earth oxide materials emit thermal radiation in a narrow spectral region, and can be used for a variety of different high-temperature applications, such as the generation of electricity by thermophotovoltaic conversion of thermal radiation. However, because a detailed understanding of the mechanism of selective emission from rare-earth atoms has so far been missing, attempts to engineer selective emitters have relied mainly on empirical approaches. In this work, we present a new quantum thermodynamic model to describe the mechanisms of thermal pumping and radiative de-excitation in rare-earth oxide materials. By evaluating the effects of the local crystal-field symmetry around a rare-earth ion, this model clearly explains how and why only some of the room-temperature absorption peaks give rise to highly efficient emission bands at high temperature (1,000-1,500 degreesC). High-temperature emissivity measurements along with photoluminescence and cathodoluminescence results confirm the predictions of the theory. (literal)
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