Recent Submissions

  • Self-calibrating closed-loop circuit for configurable constant voltage thermal anemometers 

    Gorreta Mariné, Sergio; Barajas Ojeda, Enrique; Kowalski, Lukasz; Atienza García, María Teresa; Domínguez Pumar, Manuel; Jimenez Serres, Vicente (Institution of Electrical Engineers, 2015-09-17)
    Article
    Open Access
    A new circuit is described which applies a configurable voltage across an RTD while the current flowing through it is measured with a current mirror. The circuit also allows working with voltages above the IC supply voltage ...
  • 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
    Restricted access - publisher's policy
    © 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 ...
  • The effect of absorption losses on the optical behaviour of macroporous silicon photonic crystal selective filters 

    Vega Bru, Didac; Cardador Maza, David; Todorov Trifonov, Trifon; Garin Escriva, Moises; Rodríguez Martínez, Ángel (2016-02-15)
    Article
    Open Access
    The effect of losses in photonic crystal structures on transmittance and reflectance has been studied by numerical techniques, and compared to fabricated macroporous silicon samples. Material absorption and tolerances of ...
  • Experimental determination of base resistance contribution for point-like contacted c-Si solar cells using impedance spectroscopy analysis 

    Orpella García, Alberto; Martín García, Isidro; López González, Juan Miguel; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón (2015-10)
    Article
    Restricted access - publisher's policy
    One of the most common strategies in high-efficiency crystalline silicon (c-Si) solar cells for the rear surface is the combination of a dielectric passivation with a point-like contact to the base. In such devices, the ...
  • Study of the surface recombination velocity for ultraviolet and visible laser-fired contacts applied to silicon heterojunction solar cells 

    Morales Vilches, Ana Belén; Voz Sánchez, Cristóbal; Colina Brito, Mónica Alejandra; Muñoz Martín, D.; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Molpeceres Alvarez, Carlos; Alcubilla González, Ramón (2015-07-01)
    Article
    Open Access
    In this study, we investigate the effect of the laser-firing process on the back surface passivation of p-type silicon heterojunction solar cells. For that purpose, two different nanosecond laser sources radiating at ...
  • Base contacts and selective emitters processed by laser doping technique for p-type IBC c-Si solar cells 

    López Rodríguez, Gema; Ortega Villasclaras, Pablo Rafael; Martín García, Isidro; Voz Sánchez, Cristóbal; Morales Vilches, Ana Belén; Orpella García, Alberto; Alcubilla González, Ramón (2015-08-28)
    Article
    Open Access
    Abstract In this work, we describe a novel fabrication process of p-type interdigitated back contact (IBC) silicon solar developed by means of laser doping and laser firing techniques. We use dielectric layers both as ...
  • Light harvesting by a spherical silicon microcavity 

    Garin Escriva, Moises; Fenollosa Esteve, Roberto; Ortega Villasclaras, Pablo Rafael; Meseguer Rico, Francisco Javier (American Institute of Physics (AIP), 2016)
    Article
    Open Access
    Silicon colloids are presented as efficient absorbers in the VIS-NIR region. The theory of resonant absorption by Mie modes in a single high-index sphere is reviewed and engineering rules established. The presented model ...
  • Sliding-mode analysis of the dynamics of sigma-delta controls of dielectric charging 

    Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-03-08)
    Article
    Open Access
    The purpose of this paper is to show that sigma-delta controllers of dielectric charge can be analyzed using the tools of sliding-mode controllers, in the infinite sampling frequency approximation. This allows to study the ...
  • Simultaneous control of dielectric charge and device capacitance in electrostatic MEMS 

    Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel (2015-12)
    Article
    Open Access
    This letter presents a double closed loop for simultaneously controlling the net dielectric charge and the device capacitance in contactless electrostatic MEMS devices. The first loop controls the net charge trapped in ...
  • Active control of the surface potential of nanostructured layers 

    Domínguez Pumar, Manuel; Kowalski, Lukasz; Llobet, E.; Calavia, Raül (2016-01-21)
    Article
    Open Access
    The objective of this letter is to show the first results obtained with a control designed to keep the average surface potential of a nanostructured layerconstant. This condition is equivalent to keeping constant the ...

View more