Now showing items 1-19 of 19

  • Characterization of nanoparticles deposition with electrospray 

    Coll Valentí, Arnau (Universitat Politècnica de Catalunya, 2010-09)
    Master thesis
    Open Access
    Nowadays the nanotechnology is pushing hard in almost every direction of the technology. Creating patterns with nanoparticles would be a very useful technique in order to manipulated nanoparticles. Here comes the ...
  • Colloidal crystals by electrospraying polystyrene nanofluids 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Hernández García, David; Castañer Muñoz, Luis María (2013-01-12)
    Article
    Open Access
  • c-Si solar cells based on laser-processed dielectric films 

    Martín García, Isidro; Colina Brito, Mónica Alejandra; Coll Valentí, Arnau; López Rodríguez, Gema; Ortega Villasclaras, Pablo Rafael; Orpella García, Alberto; Alcubilla González, Ramón (2014-09)
    Article
    Restricted access - publisher's policy
    This paper shows an innovative and low temperature fabrication technology for crystalline silicon (c-Si) solar cells where the highly-doped regions are punctually defined through laser processed dielectric films. ...
  • DopLa solar cells with texturized front surface 

    Martín García, Isidro; Coll Valentí, Arnau; López Rodríguez, Gema; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Alcubilla González, Ramón (Elsevier, 2016)
    Conference report
    Open Access
    In this work, we report on improving efficiency of DopLa cells fabricated on p-type substrates. This type of solar cells has all the highly-doped regions based on laser doping from dielectric films resulting in a very ...
  • Dynamic simulation of particle self-assembly applied to microarray technology 

    Virgilio, Vito di; Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2010)
    Conference report
    Restricted access - publisher's policy
    In this work we want to explore some techniques, microfluidic and electrosprayionization based, suitable for dynamic microarrays' fabrication. The fabrication techniques are based on manipulation and self-assembly of ...
  • Effect of nanofluid conductivity and humidity on the self-assembly of colloidal crystals by means of electrospray 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference lecture
    Open Access
  • Effect of nanofluid conductivity and humidity on the self-assembly of nanoparticles deposited by electrospray 

    Coll Valentí, Arnau; Bermejo, Sandra; Martín García, Isidro; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    Electrospray technique has been used in previous works as an excellent way to develop ordered nanostructures. This work focuses on the necessary conditions to achieve 3D nano-ordered layers, which are mainly determined by ...
  • From random to order: Colloidal crystals on non-flat surfaces 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Alcubilla González, Ramón (2016-03-05)
    Article
    Open Access
    © 2016 Elsevier B.V. All rights reserved. This paper introduces the possibility to produce 1-2 cm2 and tens of layers colloidal crystals on different non-flat surfaces by means of electrospray deposition. Two different ...
  • Impact of metallization techniques of surface passivation of high efficiency crystalline silicon solar cells 

    Coll Valentí, Arnau; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Bermejo Broto, Sandra; López, Gema; Alcubilla González, Ramón (2013)
    Conference report
    Restricted access - publisher's policy
    Most of the high-efficiency c-Si solar cells are based on dielectric films that electrically passivate c-Si surface and must keep their passivation properties after metal deposition on top of them. This work studies the ...
  • Influence of amorphous silicon carbide intermediate layer in the back-contact structure of Cu2ZnSnSe4 solar cells 

    Colina Brito, Mónica Alejandra; Martín García, Isidro; Giraldo, Sergio; Sánchez González, Yudania; Kondrotas, Rokas; Oliva, Florian; Izquierdo Roca, Víctor; Pérez Rodríguez, Alejandro; Coll Valentí, Arnau; Alcubilla González, Ramón; Saucedo Silva, Edgardo Ademar (2016-08-01)
    Article
    Open Access
    Cu2 ZnSn(S1-ySey )4 (CZTS) thin-film solar cells have been qualified as potential competitors of the more established CIGS ones. One of the more important handicaps of CZTS solar cells is the open-circuit voltage deficit. ...
  • Laser contact through electrosprayed alumina inverse opals on silicon 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Alcubilla González, Ramón (2015-02-18)
    Article
    Open Access
    In crystalline silicon (c-Si) solar cell field, an intensive effort is being paid to reduce the quantity of silicon material used in each cell in order to minimize its costs. With the reduction of wafer thickness, light ...
  • Mechanical properties of Al2O3 inverse opals by means of nanoindentation 

    Roa Rovira, Joan Josep; Coll Valentí, Arnau; Bermejo, Sandra; Jiménez Piqué, Emilio; Alcubilla González, Ramón; Castañer Muñoz, Luis María; Llanes Pitarch, Luis Miguel (2016)
    Article
    Open Access
    In order to understand the mechanical behaviour of Al2O3 inverse opals, nanoindentation techniques have been implemented in material layers with three different microstructures, in terms of hollow or polystyrene spheres, ...
  • Metal-insulator-metal capacitor using electrosprayed nanoparticles 

    Veliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Coll Valentí, Arnau; Castañer Muñoz, Luis María (2014-07-07)
    Article
    Restricted access - publisher's policy
    An electrospray technique has been used to deposit SiO2 nanoparticles as insulator layer of a metal-insulator-metal device. Impedance spectroscopy measurements show that a 4.4 factor increase in capacitance is achieved ...
  • Modeling and simulation of a cost-effective microfluidic circuit for particles' manipulation 

    Virgilio, Vito di; Bermejo Broto, Sandra; Castañer Muñoz, Luis María; Coll Valentí, Arnau (2011)
    Conference lecture
    Open Access
  • Nanohole particle filling by electrospray 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    Nanostructuring materials such as silicon provides a good technology to fabricate optical and sensing devices. The possibility to fill the pores or channels with different material opens the way to new applications. In ...
  • Self-assembly of ordered polystyrene and silica nanostructures by electrospray 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2013)
    Conference lecture
    Restricted access - publisher's policy
  • Self-assembly of ordered silica nanostructures by electrospray 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2014-06-01)
    Article
    Restricted access - publisher's policy
    In this paper we introduce the electrospray technique as a suitable method to create SiO2 3D ordered nanostructures. We describe the experimental procedure and deposition parameters required. We have found that the use of ...
  • Simulation of photonic crystals particle filling by electrospray 

    Coll Valentí, Arnau; Virgilio, Vito di; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2010)
    Conference report
    Restricted access - publisher's policy
    Photonic crystals are widely used in optical applications as waveguides and band filters. Filling the periodic structural material of photonic crystals with other materials is very useful in order to change the optical ...
  • Thermal response of AlN and CNx films as coatings of thin film anemometers 

    Arroyo, J.; Silvestre Bergés, Santiago; Coll Valentí, Arnau; Castañer Muñoz, Luis María (2013-05)
    Article
    Restricted access - publisher's policy
    Layers of AlN and CNx were investigated as suitable films to coat thin film anemometers because they are simultaneously electrical isolators and thermal conductors. Thermal time constants were measured and thermal equivalent ...