Exploració per altres contribucions "Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies"

Ara es mostren els items 1-20 de 521

    • 2D/3D Simulations of black-silicon interdigitated back-contacted c-si(n) solar cells 

      Calle Martín, Eric; Carrió, David; Ortega Villasclaras, Pablo Rafael; von Gastrow, Guillaume; Savin, Hele; Martín García, Isidro; Alcubilla González, Ramón (WIP Renewable Energies, 2016)
      Comunicació de congrés
      Accés obert
      Black silicon (b-Si) reduces drastically light reflectance in the front side of c-Si solar cells to values near zero for the whole absorbed solar spectrum. In this work, we apply 2D and 3D simulations to explore the ...

    • 3Cat-1 project: a multi-payload CubeSat for scientific experiments and technology demonstrators 

      Jové Casulleras, Roger; Araguz López, Carles; Via Ortega, Pol; Solanellas Bofarull, Arnau; Amézaga Sarries, Adrià; Vidal Mateu, David; Muñoz Martin, Joan Francesc; Marí Barceló, Marc; Olivé Muñiz, Roger; Sáez Hernández, Alberto; Jané Abad, Jaume; Bou Balust, Elisenda; Iannazzo Soteras, Mario Enrique; Gorreta Mariné, Sergio; Ortega Villasclaras, Pablo Rafael; Pons Nin, Joan; Domínguez Pumar, Manuel; Alarcón Cot, Eduardo José; Ramos Castro, Juan José; Camps Carmona, Adriano José (2017)
      Article
      Accés obert
      This article introduces 3 Cat-1, the first project of the Technical University of Catalonia to build and launch a nano-satellite. Its main scope is to develop, construct, assemble, test and launch into a low Earth orbit a ...

    • 3Cat-1: a multi-payload Cubesat-based scientific and technology demonstrator 

      Jové Casulleras, Roger; Camps Carmona, Adriano José; Ramos Castro, Juan José; Alarcón Cot, Eduardo José; Bou Balust, Elisenda; Carreño Luengo, Hugo; Amézaga Sarries, Adrià; Olivé Muñiz, Roger; Vidal Mateu, David; Muñoz Martin, Joan Francesc; Araguz López, Carles; Marí Barceló, Marc; Ortega Villasclaras, Pablo Rafael; Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Iannazzo Soteras, Mario Enrique (European Spatial Agengy (ESA), 2014)
      Comunicació de congrés
      Accés obert

    • 3D metallo-dielectric structures combining electrochemical and electroplating techniques 

      Hernández Díaz, David; Lange, D.; Todorov Trifonov, Trifon; Garin Escriva, Moises; García Molina, Francisco Miguel; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010-06)
      Article
      Accés restringit per política de l'editorial
      Three-dimensional (3D) periodic nickel micro-structures with a periodicity of 4 μm and high number of structural periods were fabricated by electrodeposition. Macroporous silicon, consisting of periodic arrays of sine-wave ...

    • 3D simulations of back-contact back-junction c-Si(P) solar cells with doped point contacts 

      Carrió Díaz, David; Ortega Villasclaras, Pablo Rafael; López, Gema; López González, Juan Miguel; Martín García, Isidro; Voz Sánchez, Cristóbal; Alcubilla González, Ramón (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The back-contact back-junction BC-BJ solar cell concept is a promising photovoltaic structure for both laboratory and industrial c-Si solar cells. High efficiency devices based on this concept have been reported in the ...

    • 3D simulations of interdigitated back-contacted crystalline silicon solar cells on thin substrates 

      Jin, Chen; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Calle Martín, Eric; Alcubilla González, Ramón (2018-06-01)
      Article
      Accés obert
      Interdigitated back contact technology is a promising candidate to be applied to thin crystalline silicon solar cells because of its simpler one-side interconnection while allowing a more flexible front surface treatment. ...

    • 3D TCAD modeling of laser processed c-Si solar cells 

      López González, Juan Miguel; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Orpella García, Alberto; Alcubilla González, Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents an 3D TCAD model of crystalline Silicon (c-Si) solar cells. Physical parameters used in the model are discussed. Simulation results are compared to experimental current-voltage curves and solar cell ...

    • A compact charge ratio expression for the emitter delay of polysilicon emitter bipolar transistors 

      Castañer Muñoz, Luis María; Sureda, S; Bardés Llorensí, Daniel; Alcubilla González, Ramón (1994-03)
      Article
      Accés obert
      A compact solution for the ratio of the excess minority carrier charge stored into the polysilicon to the charge stored in the single crystal part of the emitter of a polysilicon emitter bipolar transistor is derived. The ...

    • A compact tetrathiafulvalene-benzothiadiazole dyad and its highly symmetrical charge-transfer salt: Ordered donor p-stacks closely bound to their acceptors 

      Geng, Yan; Pfattner, Raphael; Campos García, Antonio; Hauser, Jürg; Laukhin, Vladimir N.; Puigdollers i González, Joaquim; Veciana Miró, Jaume; Mas Torrent, Marta; Rovira Angulo, Concepció; Decurtins, Silvio; Liu, Shixia (2014-06-02)
      Article
      Accés restringit per política de l'editorial
      A compact and planar donor-acceptor molecule 1 comprising tetrathiafulvalene (TTF) and benzothiadiazole (BTD) units has been synthesised and experimentally characterised by structural, optical, and electrochemical methods. ...

    • A critical analysis on the role of back surface passivation for a-Si/c-Si heterojunction solar cells 

      Chatterji, N; Khatavkar, Sanchit; Voz Sánchez, Cristóbal; Morales Vilches, Ana Belén; Puigdollers i González, Joaquim; Mohan Arora, Brij; Antony, Aldrin; Naip, Praadep R (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Back surface passivation is a well-known method to reduce carrier recombination and hence improves the efficiency of crystalline silicon solar cells. In this manuscript, we critically analyze the role of this process for ...

    • A crosstalk latch circuit design 

      Rubio Sola, Jose Antonio; Pons Nin, Joan; Anglada, Raimon (Institute of Electrical and Electronics Engineers (IEEE), 1990)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A D-latch sequential circuit design is presented that exhibits an elevated degree of tolerance to common and differential mode noise in the clock lines. The circuit tolerates noise voltages in the clock signals in the range ...

    • A CubeSAT payload for in-situ monitoring of pentacene degradation due to atomic oxygen etching in LEO 

      Gorreta Mariné, Sergio; Pons Nin, Joan; López Rodríguez, Gema; Figueras, Eduard; Jové Casulleras, Roger; Araguz López, Carles; Via Ortega, Pol; Camps Carmona, Adriano José; Domínguez Pumar, Manuel (2016-09-01)
      Article
      Accés obert
      This paper reports and discusses the design and ground tests of a CubeSat payload which allows to measure, in-situ and in real time, the degradation of a polymer of electronic interest due to atomic oxygen etching in LEO. ...

    • A million-channel CO-PrOx microreactor on a fingertip for fuel cell application 

      Llorca Piqué, Jordi; Rosell, O.; Divins, N.J.; López, E.; Roig Costa, Maria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; González de Rivera, F.; Rodríguez, L.I.; Seco, M. (2010)
      Article
      Accés restringit per política de l'editorial
      A silicon micromonolith containing ca.40000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with anAu/TiO2 catalyst for CO preferential oxidation(CO-PrOx) in the presence ...

    • A million-microchannel multifuel steam reformer for hydrogen production 

      Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-05-05)
      Article
      Accés obert
      A functionalized silicon micromonolith of 7 mm in diameter and 210 μm-thick was evaluated for the production of hydrogen from the steam reforming (SR) of various fuels, containing different functional groups, such as ...

    • A miniaturized 3d heat flux sensor to characterize heat transfer in regolith of planets and small bodies 

      Domínguez Pumar, Manuel; Rodríguez Manfredi, José Antonio; Jiménez Serres, Vicente; Bermejo Broto, Sandra; Pons Nin, Joan (Multidisciplinary Digital Publishing Institute (MDPI), 2020-08-01)
      Article
      Accés obert
      The objective of this work is to present the first analytical and experimental results obtained with a 3D heat flux sensor for planetary regolith. The proposed structure, a sphere divided in four sectors, is sensible to ...

    • A miniaturized two axis sun sensor for attitude control of nano-satellites 

      Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
      Article
      Accés obert
      This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...

    • A new design of high precision solar microsensor for satellite aplications 

      Delgado, Francisco; Ortega Villasclaras, Pablo Rafael; Lopez Tarrida, Cristina; Garcia Ortega, Juan; Angulo, Manuel; Quero Reboul, Jose Manuel (IEEE, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper shows the design and calibration of an improved miniaturized two-axis sun sensor for satellite attitude control. The proposed new structure is based on a previous sun sensor structure by adding multiple sensing ...

    • A novel Σ-Δ pulsed digital oscillator (PDO) for MEMS 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi; Bermejo Pelayo, Agustin; Figueras Costa, Eduardo (IEEE, 2005-12)
      Article
      Accés obert
      A novel digital oscillator topology for microelectromechanical systems (MEMS) based on bandpass sigma–delta modulation is presented. Short pulses of force of the same amplitude maintain the oscillation and the associated ...

    • A prototype reactor for highly selective solar-driven CO2 reduction to synthesis gas using nanosized earth-abundant catalysts and silicon photovoltaics 

      Urbain, Félix; Tang, Pengyi; Carretero González, Nina Maga; Andreu, Teresa; Gerling Sarabia, Luis Guillermo; Voz Sánchez, Cristóbal; Arbiol Cobos, Jordi; Morante Lleonart, Joan Ramon (2017-10)
      Article
      Accés obert
      The conversion of carbon dioxide (CO2) into value-added chemicals and fuels, preferably using renewable energy and earth-abundant materials, is considered a key priority for future energy research. In this work, a bias-free ...

    • A rapid, low-cost, and scalable technique for printing state-of-the-art organic field-effcet transistors 

      Temiño, Inés; Del Pozo León, Freddy; Ajayakumar, M.R.; Galindo Lorente, Sergi; Puigdollers i González, Joaquim; Mas Torrent, Marta (2016-06-13)
      Article
      Accés obert
      In the last few years exciting advances have been achieved in developing printing techniques for organic semiconductors, and impressive mobility values have been reported for the resulting organic field-effect transistors ...