Exploració per autor "Coll Valentí, Arnau"
Ara es mostren els items 1-20 de 20
-
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
Accés restringit per política de l'editorialThis 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. ... -
Characterization of nanoparticles deposition with electrospray
Coll Valentí, Arnau (Universitat Politècnica de Catalunya, 2010-09)
Projecte Final de Màster Oficial
Accés obertNowadays 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
Accés obert -
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)
Text en actes de congrés
Accés obertIn 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)
Text en actes de congrés
Accés restringit per política de l'editorialIn 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)
Comunicació de congrés
Accés obert -
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)
Text en actes de congrés
Accés obertElectrospray 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
Accés obert© 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)
Text en actes de congrés
Accés restringit per política de l'editorialMost 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
Accés obertCu2 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
Accés obertIn 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
Accés obertIn 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
Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Coll Valentí, Arnau; Castañer Muñoz, Luis María (2014-07-07)
Article
Accés restringit per política de l'editorialAn 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)
Comunicació de congrés
Accés obert -
Nanohole particle filling by electrospray
Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialNanostructuring 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)
Comunicació de congrés
Accés restringit per política de l'editorial -
Self-assembly of ordered silica nanostructures by electrospray
Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2014-06-01)
Article
Accés restringit per política de l'editorialIn 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)
Text en actes de congrés
Accés restringit per política de l'editorialPhotonic 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 ... -
TCO-free low-temperature p+ emitters for back-junction c-Si solar cells
Martín García, Isidro; Coll Valentí, Arnau; López Rodríguez, Gema; Ortega Villasclaras, Pablo Rafael; Desrues, Thibaut; Orpella García, Alberto; Alcubilla González, Ramón (Elsevier, 2015-08-28)
Article
Accés obertIn this work, we report on the fabrication and characterization of n-type c-Si solar cells whose p+ emitters are based on laser processed aluminum oxide/silicon carbide (Al2O3/SiCx) films. The p+ emitter is defined at the ... -
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
Accés restringit per política de l'editorialLayers 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 ...