Now showing items 1-20 of 35

  • Acceleration of the measurement time of thermopiles using sigma-delta control 

    Domínguez Pumar, Manuel; perez, eduard; Ramon, Marina; Jiménez Serres, Vicente; Bermejo Broto, Sandra; Pons Nin, Joan (Multidisciplinary Digital Publishing Institute (MDPI), 2019-07-18)
    Article
    Open Access
    This work presents a double sliding mode control designed for accelerating the measurement of heat fluxes using thermopiles. The slow transient response generated in the thermopile, when it is placed in contact with the ...
  • Accurate and wide field of view MEMS-based sun sensor for industrial applications 

    Delgado, Francisco; Quero, J.M.; Garcia Ortega, Juan; López Tarrida, Cristina; Ortega Villasclaras, Pablo Rafael; Bermejo Broto, Sandra (IEEE Press. Institute of Electrical and Electronics Engineers, 2012-02-24)
    Article
    Restricted access - publisher's policy
    This paper describes the design, fabrication, simulation, and experimental results of an improved miniaturized two-axis sun sensor for industrial applications, created by adapting a technology used previously in satellite ...
  • Adaptación de una asignatura de electronica digital a la semipresencialidad y al Espacio Europeo de Educación Superior 

    Bermejo Broto, Sandra; Chávez Domínguez, Juan Antonio; Domínguez Pumar, Manuel; Pons Nin, Joan (2010)
    Conference report
    Open Access
    Este trabajo describe y analiza la evolución del formato semipresencial de la asignatura Sistemas Digitales 1, inicialmente impartida dentro de una titulación de segundo ciclo y actualmente adaptada al EEES e impartida ...
  • Advances in a baseline process towards high efficiency c-Si solar cell fabrication 

    Alcubilla González, Ramón; Ortega Villasclaras, Pablo Rafael; López, G.; Martín García, Isidro; Bermejo Broto, Sandra; Blanqué, Servane; García Molina, Francisco Miguel; Orpella García, Alberto; Voz Sánchez, Cristóbal (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
    Conference report
    Open Access
  • Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates 

    Coll, Arnau; Bermejo Broto, Sandra; Hernández, David; Castañer Muñoz, Luis María (2018-01-19)
    Article
    Open Access
    The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% ...
  • Capacitance study of a polystyrene nanoparticle capacitor using impedance spectroscopy 

    Véliz Noboa, Bremnen Marino; Orpella García, Alberto; Bermejo Broto, Sandra (2019-07-19)
    Article
    Restricted access - publisher's policy
    In this study, a metal-insulator-metal capacitor structure is fabricated using polystyrene nanoparticles. Impedance spectroscopy is used to evaluate the performance of this capacitor in which we found a significant magnitude ...
  • Células fotovoltaicas con un rendimiento del 20.5% 

    Alcubilla González, Ramón; García Molina, Francisco Miguel; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Orpella García, Alberto; Martín García, Isidro; Colina, M.; Voz Sánchez, Cristóbal; Bermejo Broto, Sandra; Puigdollers i González, Joaquim (Grupo Acorde Comunicación (GAC), 2011-03-01)
    Article
    Restricted access - publisher's policy
    Un grupo de investigadores de la Universitat Politècnica de Catalunya (UPC) han desarrollado un proceso de fabricación que permite obtener rendimientos de conversión fotovoltaicos del 20,5%. Esto supone una mejora sustancial ...
  • 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
  • Crystalline silicon solar cells beyond 20% efficiency 

    Alcubilla González, Ramón; García Molina, Francisco Miguel; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Orpella García, Alberto; Martín García, Isidro; Colina, M.; Voz Sánchez, Cristóbal; Bermejo Broto, Sandra; Puigdollers i González, Joaquim (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
    Conference report
    Open Access
    —This paper describes a fabrication process to obtain high efficiency c-Si cells (> 20%) based on the Laser Fired Contact Passivated Emitter Rear Cell (LFC-PERC) concept. Photovoltaic efficiencies beyond 20% have ...
  • c-Si photovoltaic arrays 

    Bermejo Broto, Sandra; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis María (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Conference report
    Open Access
    Crystalline silicon small photovoltaic arrays are shown. Electrical isolation of individual cells and series connection between them to integrate series arrays are discussed. High open circuit voltage values in the range ...
  • 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 dielectrophoretic force in the self-assembly process of electrosprayed nanoparticles 

    Castañer Muñoz, Luis María; Bermejo Broto, Sandra; Domínguez Pumar, Manuel (2017-03-31)
    Article
    Open Access
    In this work the effect of the dielectrophoretic force (DEP) in the self-assembly process of nanoparticles electrosprayed onto a substrate, is examined. DEP force is originated by the electric field created by the electrospray ...
  • 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
  • EWOD using nonaqueous liquids 

    Ahmadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2015-04-18)
    Article
    Open Access
    Electrowetting on Dielectric (EWOD) has been studied for more than a decade and used for different applications but still there are few works on non-aqueous liquids such as mixtures of polyols. We have found that significant ...
  • Examen Final 

    Altet Sanahujes, Josep; Bermejo Broto, Sandra; Fernández Chimeno, Mireya; Martín García, Isidro; Orpella García, Alberto; Ortega Villasclaras, Pablo Rafael; Prat Viñas, Lluís; Puigdollers i González, Joaquim; Rodríguez Martínez, Ángel; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2013-01-08)
    Exam
    Restricted access to the UPC academic community
  • Examen Final 

    Prat Viñas, Lluís; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Martín García, Isidro; Fernández, Mireia; Bermejo Broto, Sandra; Altet Sanahujes, Josep; Puigdollers i González, Joaquim; Rodriguez, Angel; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2015-01-16)
    Exam
    Restricted access to the UPC academic community
  • Fixed charge density in dielectrics deposited on c-Si using space charge region dominated lifetime measurements 

    Garin Escriva, Moises; Martín García, Isidro; Bermejo Broto, Sandra; Alcubilla González, Ramón (American Institute of Physics, 2007-06-29)
    Article
    Restricted access - publisher's policy
    Depletion region modulation (DRM) effect is often observed in photoconductance lifetime measurements of crystalline silicon wafers passivated by dielectric films. This effect is closely related to the space-charge region ...
  • 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 ...
  • High voltage ultrathin-photovoltaic minimodules: fabrication technology and application to bioimplantable telesupplying 

    Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael (2013)
    Conference lecture
    Restricted access - publisher's policy
  • High voltage ultrathin-photovoltaic minimodules: fabrication technology and application to bioimplantable telesupplying 

    Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael (2014-05-01)
    Article
    Restricted access - publisher's policy
    In this work we show small (0.49 cm2) and thin (<70 µm) photovoltaic mini-generators capable of providing open circuit voltages up to 99 V and short circuit currents of 43 µA, achieving a maximum density power of 4.8 mW/cm2. ...