Phototransport in networks of tetrapod-shaped colloidal semiconductor nanocrystals (Articolo in rivista)

Type

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

Label

• Phototransport in networks of tetrapod-shaped colloidal semiconductor nanocrystals (Articolo in rivista) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

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

• 10.1039/c0nr00308e (literal)

Alternative label

• Franchini IR, Cola A, Rizzo A, Mastria R, Persano A, Krahne R, Genovese A, Falqui A, Baranov D, Gigli G, Manna L (2010)
  Phototransport in networks of tetrapod-shaped colloidal semiconductor nanocrystals
  in Nanoscale (Print)
  (literal)

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

• Franchini IR, Cola A, Rizzo A, Mastria R, Persano A, Krahne R, Genovese A, Falqui A, Baranov D, Gigli G, Manna L (literal)

Pagina inizio

• 2171 (literal)

Pagina fine

• 2179 (literal)

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

• 2 (literal)

Rivista

• Nanoscale (Rivista)

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

• 10 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• 1. Ist Italiano Tecnol, I-16163 Genoa, Italy 2. IMM CNR, Inst Microelect & Microsyst, Unit Lecce, I-73100 Lecce, Italy 3. CNR Nanosci, NNL, I-73100 Lecce, Italy (Rizzo A., Mastria R., Persano A., Gigli G.) (literal)

Titolo

• Phototransport in networks of tetrapod-shaped colloidal semiconductor nanocrystals (literal)

Abstract

• Tetrapod-shaped CdSe(core)/CdTe(arms) colloidal nanocrystals, capped with alkylphosphonic acids or pyridine, were reacted with various small molecules (acetic acid, hydrazine and chlorosilane) which induced their tip-to-tip assembly into soluble networks. These networks were subsequently processed into films by drop casting and their photoconductive properties were studied. We observed that films prepared from tetrapods coated with phosphonic acids were not photoconductive, but tip-to-tip networks of the same tetrapods exhibited appreciable photocurrents. On the other hand, films prepared from tetrapods coated with pyridine instead of phosphonic acids were already highly photoconductive even if the nanocrystals were not joined tip-to-tip. Based on the current-voltage behavior under light we infer that the tunneling between tetrapods is the dominant charge transport mechanism. In all the samples, chemically-induced assembly into networks tended to reduce the average tunneling barrier. Additionally, pyridine-coated tetrapods and the tip-to-tip networks made out of them were tested as active materials in hybrid photovoltaic devices. Overall, we introduce an approach to chemically-induced tip-to-tip assembly of tetrapods into solution processable networks and demonstrate the enhancement of electronic coupling of tetrapods by various ligand exchange procedures. (literal)

Prodotto di

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Celle solari organiche e ibride (MD.P06.007.002) (Modulo)
• materiali e processi per la realizzazione di dispositivi per la conversione di energia (MD.P05.019.001) (Modulo)

Autore CNR

• ANNA PERSANO (Unità di personale interno)
• ADRIANO COLA (Unità di personale interno)
• GIULIANA GIGLI (Unità di personale interno)
• AURORA RIZZO (Unità di personale interno)
• GIUSEPPE GIGLI (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)
• Celle solari organiche e ibride (MD.P06.007.002) (Modulo)

Autore CNR di

• AURORA RIZZO (Unità di personale interno)
• ADRIANO COLA (Unità di personale interno)
• GIULIANA GIGLI (Unità di personale interno)
• GIUSEPPE GIGLI (Persona)
• ANNA PERSANO (Unità di personale interno)

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

• Nanoscale (Rivista)