The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots (Articolo in rivista)

Type

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

Label

• The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Morello, G; Anni, M; Cozzoli, PD; Manna, L; Cingolani, R; De Giorgi, M (2007)
  The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots
  in Nanoscale research letters (Print)
  (literal)

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

• Morello, G; Anni, M; Cozzoli, PD; Manna, L; Cingolani, R; De Giorgi, M (literal)

Pagina inizio

• 512 (literal)

Pagina fine

• 514 (literal)

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

• 2 (literal)

Rivista

• Nanoscale research letters (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Salento, CNR, INFM, NNL,Distretto Tecnol ISUFI, I-73100 Lecce, Italy; Univ Salento, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy (literal)

Titolo

• The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots (literal)

Abstract

• Time Resolved Photoluminescence (TRPL) measurements on the picosecond time scale (temporal resolution of 17 ps) on colloidal CdSe and CdSe/ZnS Quantum Dots (QDs) were performed. Transient PL spectra reveal three emission peaks with different lifetimes (60 ps, 460 ps and 9-10 ns, from the bluest to the reddest peak). By considering the characteristic decay times and by comparing the energetic separations among the states with those theoretically expected, we attribute the two higher energy peaks to +/- 1(U) and +/- 1(L) bright states of the fine structure picture of spherical CdSe QDs, and the third one to surface states emission. We show that the contribution of surface emission to the PL results to be different for the two samples studied (67% in the CdSe QDs and 32% in CdSe/ZnS QDs), confirming the decisive role of the ZnS shell in the improvement of the surface passivation. (literal)

Prodotto di

• Nanobiotecnologie & Nanobioelettronica (MD.P06.008.001) (Modulo)
• Nanotecnologie molecolari (MD.P06.007.001) (Modulo)
• Nanocompositi (MD.P06.015.001) (Modulo)

Autore CNR

• ROBERTO CINGOLANI (Persona)
• MILENA DE GIORGI (Persona)
• LIBERATO MANNA (Persona)
• MARCO ANNI (Unità di personale esterno)

Insieme di parole chiave

• Parole chiave di "The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• MILENA DE GIORGI (Persona)
• LIBERATO MANNA (Persona)
• ROBERTO CINGOLANI (Persona)
• MARCO ANNI (Unità di personale esterno)

Prodotto

• Nanobiotecnologie & Nanobioelettronica (MD.P06.008.001) (Modulo)
• Nanocompositi (MD.P06.015.001) (Modulo)
• Nanotecnologie molecolari (MD.P06.007.001) (Modulo)

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

• Nanoscale research letters (Rivista)

Insieme di parole chiave di

• Parole chiave di "The role of intrinsic and surface states on the emission properties of colloidal CdSe and CdSe/ZnS quantum dots" (Insieme di parole chiave)