Temperature dependence of the photoluminescence properties of colloidal CdSe/ZnS core/shell quantum dots embedded in a polystyrene matrix (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Temperature dependence of the photoluminescence properties of colloidal CdSe/ZnS core/shell quantum dots embedded in a polystyrene matrix (Articolo in rivista) (literal)

Anno

• 2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevB.71.235409 (literal)

Alternative label

• Valerini D., Creti A., Lomascolo M., Manna L., Cingolani R., Anni M. (2005)
  Temperature dependence of the photoluminescence properties of colloidal CdSe/ZnS core/shell quantum dots embedded in a polystyrene matrix
  in Physical review. B, Condensed matter and materials physics
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Valerini D., Creti A., Lomascolo M., Manna L., Cingolani R., Anni M. (literal)

Pagina inizio

• 235409 (literal)

Pagina fine

• 235409 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://prb.aps.org/abstract/PRB/v71/i23/e235409 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 71 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Ist Microelettron & Microsistemi, I-73100 Lecce, Italy; Univ Lecce, Natl Nanotechnol Lab, INFM, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy (literal)

Titolo

• Temperature dependence of the photoluminescence properties of colloidal CdSe/ZnS core/shell quantum dots embedded in a polystyrene matrix (literal)

Abstract

• We report on the temperature dependence of the photoluminescence (PL) spectrum and of the PL relaxation dynamics for colloidal CdSe/ZnS core/shell quantum dots (QDs) embedded in an inert polystyrene matrix. We demonstrate that the confinement energy in the QDs is independent of the temperature. The coupling with both acoustic and optical phonons is also studied. Quantum confinement results in a strong increase of the exciton-acoustic-phonon coupling constant, up to 71 mu eV/K, and in a reduced exciton-longitudinal-optical (LO)-phonon coupling constant, down to 21 meV, with respect to bulk CdSe. In addition, we demonstrate that the main nonradiative process that limits the quantum efficiency of the QD at room temperature is the thermal escape from the dot assisted by scattering with four LO phonons. Thermally activated trapping in surface states is also observed at low temperature, with an activation energy of about 15 meV. (literal)

Prodotto di

• materiali e processi per la realizzazione di dispositivi per la conversione di energia (MD.P05.019.001) (Modulo)
• Institute for microelectronics and microsystems (IMM) (Istituto)

Autore CNR

• ARIANNA CRETI' (Unità di personale interno)
• MAURO LOMASCOLO (Persona)
• LIBERATO MANNA (Persona)

Incoming links:

Prodotto

• Institute for microelectronics and microsystems (IMM) (Istituto)
• materiali e processi per la realizzazione di dispositivi per la conversione di energia (MD.P05.019.001) (Modulo)

Autore CNR di

• MAURO LOMASCOLO (Persona)
• LIBERATO MANNA (Persona)
• ARIANNA CRETI' (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review. B, Condensed matter and materials physics (Rivista)