Ara es mostren els items 14-33 de 36

    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Highly reflective and passivated ohmic contacts in p-Ge by laser processing of aSiCx:H(i)/Al2O3/aSiC films for thermophotovoltaic applications 

      Gamel, Mansur Mohammed Ali; López Rodríguez, Gema; Medrano Gómez, Álvaro Manuel; Jiménez Rodríguez, Alba María; Datas Medina, Alejandro; Garin Escriva, Moises; Martín García, Isidro (2024-01-15)
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      Accés obert
      Crystalline germanium (c-Ge) has historically been regarded as a cost-effective alternative to III-V semiconductors for thermophotovoltaic (TPV) device fabrication. However, Ge-based devices have not yet reported high ...
    • Hole selective contacts based on transition metal oxides for c-Ge thermophotovoltaic devices 

      Martín García, Isidro; López Rodríguez, Gema; Garin Escriva, Moises; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim (2023-03-01)
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      Accés obert
      Thermophotovoltaics has become a very attractive solution for heat-to-electricity conversion due to its excellent conversion efficiencies. However, further research is needed to reduce the device cost which is typically ...
    • Improving selective thermal emission properties of three-dimensional macroporous silicon through porosity tuning 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marquier, F.; Arnold, C.; Greffet, J.-J. (American Institute of Physics, 2008-08-27)
      Article
      Accés restringit per política de l'editorial
      We present a theoretical and experimental study on the effect of progressive porosity increase, through multiple oxidation/oxide removal steps, upon the optical characteristics in threedimensional macroporous silicon. ...
    • In situ size sorting in CVD synthesis of Si microspheres 

      Garin Escriva, Moises; Fenollosa Esteve, Roberto; Kowalski, Lukasz (Macmillan Publishers, 2016-12-08)
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      Accés obert
      Silicon microspheres produced in gas-phase by hot-wall CVD offer unique quality in terms of sphericity, surface smoothness, and size. However, the spheres produced are polydisperse in size, which typically range from 0.5¿µm ...
    • Influence of a gold seed in transparent V2Ox/Ag/V2Ox selective contacts for dopant-free silicon solar cells 

      Nguyen, Hieu Trung; Ros Costals, Eloi; Bertomeu Balaguero, Joan; Asensi López, José Miguel; Andreu Batallé, Jordi; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Garin Escriva, Moises; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Tom, Thomas (2018-11-05)
      Article
      Accés obert
      Dielectric/metal/dielectric structures based on vanadium pentoxide with a thin silver interlayer have been optimized to replace traditional transparent electrodes. As would be expected, there is a tradeoff in the metal ...
    • Infrared thermal emission in macroporous silicon three-dimensional photonic crystals 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2007-10)
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      Accés obert
      In this paper we investigate the infrared thermal emission properties of macroporous silicon with modulated pore diameter. Samples with different pore modulation periodicities but fixed in-plane lattice constant are ...
    • Infrared thermal emission inmacroporous silicon three-dimensional photonics crystals 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (American Institute of Physics, 2007-07-30)
      Article
      Accés restringit per política de l'editorial
      In this paper we investigate the infrared thermal emission properties of macroporous silicon with modulated pore diameter. Samples with different pore modulation periodicities but fixed in-plane lattice constant are ...
    • 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
      Accés obert
      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 ...
    • Optical properties of 3D macroporous silicon structures 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Marsal Garví, Lluís Francesc; Alcubilla González, Ramón (2008-04-15)
      Article
      Accés restringit per política de l'editorial
      We study the optical properties of three-dimensional (3D) microstructures fabricated by electrochemical etching of macroporous silicon with modulated pore diameter. Optical measurements along the pore axis reveal photonic ...
    • Silicon microcavity-based photovoltaic cells for IR harvesting 

      Garin Escriva, Moises; Fenollosa Esteve, Roberto; Alcubilla González, Ramón; Shi, Lei; Marsal Garví, Lluis; Meseguer Rico, Francisco Javier (2014-05-22)
      Article
      Accés obert
      Photovoltaic cells on silicon spherical microcavities trap IR light, increasing the probability of photon absorption and enhancing the efficiency of solar energy devices.
    • “Silicon millefeuille” : From a silicon wafer to multiple thin crystalline films in a single step 

      Hernández García, David; Todorov Trifonov, Trifon; Garin Escriva, Moises; Alcubilla González, Ramón (2013-04-29)
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      Accés obert
      During the last years, many techniques have been developed to obtain thin crystalline films from commercial silicon ingots. Large market applications are foreseen in the photovoltaic field, where important cost reductions ...
    • Silicon nanocavities: Optical properties and applications 

      Fenollosa Esteve, Roberto; Shi, Lei; Rodriguez, Isabelle; Garin Escriva, Moises; Meseguer Rico, Francisco Javier (2014)
      Text en actes de congrés
      Accés obert
      Silicon is the key enabling material for advanced technologies in electronics, and photonics. Recently, we have developed silicon nanocavities (SNs) [1,2] with particle size between 300 nm and 3000 nm. Silicon has an ...
    • Single-Step multiple-layers wafer slicing from macroporous silicon 

      Garin Escriva, Moises; Hernández García, David; Todorov Trifonov, Trifon; Cardador Maza, David; Alcubilla González, Ramón (2013)
      Text en actes de congrés
      Accés obert
      There is a rising interest, from both photovoltaics and microelectronics industry, in wafer thickness reduction. During the last decade, it has been steadily reduced from 350 µm to 180 µm, but benefits are foreseen for ...
    • Spherical silicon photonic microcavities : From amorphous to polycrystalline 

      Fenollosa Esteve, Roberto; Garin Escriva, Moises; Meseguer Rico, Francisco Javier (2016-06-16)
      Article
      Accés obert
      Shaping silicon as a spherical object is not an obvious task, especially when the object size is in the micrometer range. This has the important consequence of transforming bare silicon material in a microcavity, so it is ...
    • Strategies for high fill factor and open-circuit voltage in low-doped c-Ge TPV cells with partially contacted surfaces using 3D simulations 

      Gamel, Mansur Mohammed Ali; Shojaei, David; López Rodríguez, Gema; Garin Escriva, Moises; Martín García, Isidro (2023)
      Comunicació de congrés
      Accés obert
      Dielectric passivated surfaces provide excellent surface recombination properties while point-like contacts are defined to locally extract the current. In this solution, the distance between contacts, or pitch, is critical ...
    • Template fabrication of 3D metallic microstructures by electrochemical etching and electroplanting 

      Hernández Díaz, David; Lange, Diego; Todorov Trifonov, Trifon; Garin Escriva, Moises; García Molina, Francisco Miguel; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010)
      Text en actes de congrés
      Accés obert
      In this work, we show that macroporous silicon consisting of periodic arrays of etched pores is a feasible alternative for synthesis of 2D and 3d metallic microstructures due to its flexibility in the definition of complex ...
    • Textured PDMS films applied to thin crystalline silicon solar cells 

      Rosell, Arnau; Martín García, Isidro; Garin Escriva, Moises; López Rodríguez, Gema; Alcubilla González, Ramón (2019-12-18)
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      Accés obert
      Front surface texturization is a standard procedure used to improve optical properties of photovoltaic devices. In some particular cases, such as when dealing with ultrathin substrates, common texturization techniques can ...
    • 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)
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      Accés obert
      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 ...
    • Thermal emission of macroporous silicon chirped photonic crystals 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Hernández García, David; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010-09-15)
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      Accés obert