Listar por tema "Nanostructures"

Mostrando ítems 1-7 de 7

    • openAccess   Dielectric confinement of excitons in type-I and type-II semiconductor nanorods 

      Royo Valls, Miguel; Climente, Juan I.; Movilla, Jose L.; Planelles, Josep Institute of Physics (2011-01-12)
      We theoretically study the effect of the dielectric environment on the exciton ground state of CdSe and CdTe/CdSe/CdTe nanorods. We show that insulating environments enhance the exciton recombination rate and blueshift the ...

    • openAccess   Dilemmas of dye-sensitized solar cells 

      Bisquert, Juan Wiley-VCH Verlag Berlin (2011)
      Ferrocene to the rescue: The dye-sensitized solar cell allows changes in the energetics of electron transport, molecular absorbers, and hole transport materials to better harvest the energy of solar photons (see picture). ...

    • closedAccess   Dopant segregation analysis on Sb:SnO2 nanocrystals 

      Beltran, Armando; Stroppa, Daniel G.; Montoro, Luciano A.; Conti, Tiago G.; Da Silva, Rafael O.; Andres, Juan; Leite, Edson R.; Ramírez, Antonio J. Wiley (2011-08-26)
      The development of reliable nanostructured devices is intrinsically dependent on the description and manipulation of materials properties at the atomic scale. Consequently, several technological advances are dependent on ...

    • closedAccess   Experimental and Theoretical Study on the Structure, Optical Properties, and Growth of Metallic Silver Nanostructures in Ag3PO4 

      Botelho, Gleice; Sczancoski, Júlio César; Andres, Juan; Gracia, Lourdes; Longo, Elson American Chemical Society (2015-02)
      Theoretical and experimental studies were performed on the structure, optical properties, and growth of silver nanostructures in silver phosphate (Ag3PO4). This material was synthesized by the coprecipitation method and ...

    • openAccess   Origin of two-hole triplet splitting in circular quantum dots 

      Climente, Juan I. Elsevier (2012-05)
      Recent photoluminescence spectra of positively charged excitons in InAs/GaAs quantum dots have revealed the existence of large splittings between the View the MathML sourcep-shell triplet sublevels of holes. We provide an ...

    • openAccess   Sol-gel synthesis of tunable cerium titanate materials 

      Martos Macián, Mónica; Julian-Lopez, Beatriz; Folgado, José Vicente; Cordoncillo, Eloisa; Escribano López, Purificación ChemPubSoc Europe (2008)
      Cerium titanate structures present a high technological interest because of their optical and catalytic properties. This work reports the synthesis of these materials by a sol-gel methodology which allows to obtain mixed ...

    • closedAccess   Theory of the impedance of charge transfer via surface states in dye-sensitized solar cells 

      Bisquert, Juan Elsevier (2010)
      The dynamics of trapping coupled with charge transfer is analysed in the frequency domain for a model of the dye-sensitized solar cell. We solve the steady state occupations of the surface state and the resulting recombination ...