Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission (Articolo in rivista)

Type

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

Label

• Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission (Articolo in rivista) (literal)

Anno

• 2013-01-01T00:00:00+01:00 (literal)

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

• 10.1021/ja404694k (literal)

Alternative label

• Li H., Brescia R., Povia M., Prato M., Bertoni G., Manna L., Moreels I. (2013)
  Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission
  in Journal of the American Chemical Society (Print); American Chemical Society, Washington (Stati Uniti d'America)
  (literal)

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

• Li H., Brescia R., Povia M., Prato M., Bertoni G., Manna L., Moreels I. (literal)

Pagina inizio

• 12270 (literal)

Pagina fine

• 12278 (literal)

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

• http://pubs.acs.org/doi/abs/10.1021/ja404694k (literal)

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

• 135 (literal)

Rivista

• Journal of the American Chemical Society (Rivista)

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

• 33 (literal)

Note

• ISI Web of Science (WOS) (literal)
• Scopu (literal)

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

• Istituto Italiano di Tecnologia, via Morego 30, IT-16163 Genova, Italy; IMEM-CNR, Parco Area delle Scienze 37/A, IT-43124 Parma, Italy (literal)

Titolo

• Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission (literal)

Abstract

• We present the synthesis of novel disk-shaped hexagonal Cu2Te nanocrystals with a well-defined stoichiometric composition and tunable diameter and thickness. Subsequent cation exchange of Cu to Cd at high temperature (180 C) results in highly fluorescent CdTe nanocrystals, with less than 1 mol % of residual Cu remaining in the lattice. The procedure preserves the overall disk shape, but is accompanied by a substantial reconstruction of the anion sublattice, resulting in a reorientation of the c-axis from the surface normal in Cu2Te into the disk plane in CdTe nanodisks. The synthesized CdTe nanodisks show a continuously tunable photoluminescence (PL) peak position, scaling with the thickness of the disks. The PL lifetime further confirms that the CdTe PL arises from band-edge exciton recombination; that is, no Cu-related emission is observed. On average, the recombination rate is about 25-45% faster with respect to their spherical quantum dots counterparts, opening up the possibility to enhance the emission rate at a given wavelength by controlling the nanocrystal shape. Finally, with a PL quantum efficiency of up to 36% and an enhanced PL stability under ambient conditions due to a monolayer of CdS formed on the nanocrystal surface during cation exchange, these flat quantum disks form an interesting enrichment to the current family of highly fluorescent, shape-controlled nanocrystals. © 2013 American Chemical Society. (literal)

Editore

• American Chemical Society (Editore)

Prodotto di

• Sviluppo, caratterizzazione strutturale e modelling di strutture avanzate per elettronica (MD.P05.002.001) (Modulo)
• Istituto dei materiali per l'elettronica ed il magnetismo (IMEM) (Istituto)

Autore CNR

• GIOVANNI BERTONI (Persona)

Insieme di parole chiave

• Parole chiave di "Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto dei materiali per l'elettronica ed il magnetismo (IMEM) (Istituto)
• Sviluppo, caratterizzazione strutturale e modelling di strutture avanzate per elettronica (MD.P05.002.001) (Modulo)

Autore CNR di

• GIOVANNI BERTONI (Persona)

Editore di

• American Chemical Society (Editore)

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

• Journal of the American Chemical Society (Rivista)

Insieme di parole chiave di

• Parole chiave di "Synthesis of uniform disk-shaped copper telluride nanocrystals and cation exchange to cadmium telluride quantum disks with stable red emission" (Insieme di parole chiave)