Now showing items 1-15 of 15

    • Compact device for CO2 optical sensign using macroporous silicon photonic crystals 

      Vega, Didac; Rodríguez Martínez, Ángel; Calavia, Raül; Vilanova, Xavier; Todorov Trifonov, Trifon (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      A photonic crystal based on a macroporous silicon structure has been fabricated and successfully used for the detection of carbon dioxide. In this paper, the device and the measurement results are presented. The sensing ...
    • Dynamics of fast pattern formation in porous silicon by laser interference 

      Pelaez de Fuentes, Ramon Javier; Khun, Timo; Vega Lerín, Fidel; Afonso Rodriguez, Carmen Nieves (2014-10-24)
      Article
      Open Access
      Patterns are fabricated on 290 nm thick nanostructured porous silicon layers by phase-mask laser interference using single pulses of an excimer laser (193 nm, 20 ns pulse duration). The dynamics of pattern formation is ...
    • Electronic transport in low temperature nanocrystalline silicon thin-film transistors obtained by hot-wire CVD 

      Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Orpella García, Alberto; Martín García, Isidro; Soler Vilamitjana, David; Fonrodona, Marta; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Alcubilla González, Ramón (2002-04)
      Article
      Restricted access - publisher's policy
      Hydrogenated nanocrystalline silicon (nc-Si:H) obtained by hot-wire chemical vapour deposition (HWCVD) at low substrate temperature (150 °C) has been incorporated as the active layer in bottom-gate thin-film transistors ...
    • Fabricación de estructuras para cristales fotónicos basados en silicio macroporoso 

      Lange Vega, Diego (Universitat Politècnica de Catalunya, 2009-07)
      Master thesis
      Open Access
      Este proyecto tiene como objetivo fabricar estructuras de níquel utilizando silicio macroporoso como molde. La aplicación inicial de estas estructuras es el diseño y fabricación de cristales fotónicos de níquel. Para ...
    • High efficiency black silicon Interdigitated Back Contacted solar cells on p- and n-type c-Si substrates 

      Ortega Villasclaras, Pablo Rafael; Calle, Eric; von Gastrow, Guillaume; Repo, Päivikki; Carrió, David; Savin, Hele; Alcubilla, Ramón (2015)
      Article
      Open Access
      This work demonstrates the high potential of Al2O3 passivated black silicon in high-efficiency interdigitated back contacted (IBC) solar cells by reducing surface reflectance without jeopardizing surface passivation. Very ...
    • High-density capacitor devices based on macroporous silicon and metal electroplating 

      Vega, Didac; Reina Marsinyach, Jordi; Pavón Urbano, Ramón; Rodríguez Martínez, Ángel (2014-01)
      Article
      Restricted access - publisher's policy
      This paper presents a novel technique for the fabrication of ultrahigh capacitance structures based on macroporous silicon. Electrochemical etching is used to create a 3-D template in silicon. These structures reach high ...
    • Laser fabrication of porous silicon-based platforms for cell culturing 

      Pelaez de Fuentes, Ramon Javier; Afonso Rodriguez, Carmen Nieves; Vega Lerín, Fidel; Recio Sanchez, Gonzalo; Torres Costa, Vicente; Manso Silvan, Miguel; Garcia Ruiz, Josefa Predenstinacion; Martin Palma, Raul Jose (2013-11)
      Article
      Restricted access - publisher's policy
    • Macroporous silicon FET transistors for power applications 

      Vega, Didac; Najar, R.; Pina, Maria; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In this paper we propose the use of macroporous silicon for microelectronic devices. We propose and study four different FET transistor structures using macroporous silicon as base material. Macroporous silicon is a ...
    • Macroporous silicon for high-capacitance devices using metal electrodes 

      Vega Bru, Didac; Reina Marsinyach, Jordi; Martin, Ferran; Pavón Urbano, Ramón; Rodríguez Martínez, Ángel (2014-09-05)
      Article
      Open Access
      In this paper, high-capacity energy storage devices based on macroporous silicon are demonstrated. Small footprint devices with large specific capacitances up to 100 nF/mm(2), and an absolute capacitance above 15 mu F, ...
    • Macroporous silicon microreactor for the preferential oxidation of CO 

      Divins, N.J.; López, E.; Llorca, J.; Vega, Didac; Rodríguez Martínez, Ángel; González de Rivera, F.; Angurell, I.; Seco, M.; Rossell, O. (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      A macroporous silicon micromonolith containing ca. 40,000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with an Au/TiO2 catalyst for CO preferential oxidation (CO-PrOx) ...
    • Macroporous silicon photonic crystals for gas sensing 

      Vega, Didac; Reina, Jordi; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In this paper we study a compact gas sensor based on a photonic crystal built from macroporous silicon. Its sensing mechanism is based in the absorption of infrared light by a gas. Photonic crystals are structured materials ...
    • Micro and nanophotonic structures in the visible and near infrared spectral for optical devices 

      Nghiem, Xuan Tan (Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2013-09-10)
      Master thesis
      Open Access
      [ANGLÈS] This thesis present the simulation program for 1D photonic crystals and fabrication process of nano-structured optical devices based on porous silicon layers prepared by electrochemical etching method and the ...
    • Nanoporous silicon-based surface patterns fabricated by UV laser interference techniques for biological applications 

      Recio Sánchez, Gonzalo; Pelaez de Fuentes, Ramon Javier; Vega Lerín, Fidel; Martín Palma, Raúl José (2016-05-04)
      Article
      Open Access
      The fabrication of selectively functionalized micropatterns based on nanostructured porous silicon (nanoPS) by phase mask ultraviolet laser interference is presented here. This single-step process constitutes a flexible ...
    • Semiconducting P3HT microstructures: fibres and tubes obtained from macroporous silicon template 

      Palacios, R; Formentin, P; Todorov Trifonov, Trifon; Estrada del Cueto, Magali; Alcubilla González, Ramón; Pallares, J; Marsal, L F (2008-10)
      Article
      Restricted access - publisher's policy
      Microtubes and microfibres composed of poly(3-hexylthiophene) (P3HT) were fabricated by melt-assisted templates using ordered macroporous silicon. We have studied the influence of the pore depth and the template type on ...
    • Ultraviolet laser patterning of porous silicon 

      Vega Lerín, Fidel; Pelaez de Fuentes, Ramon Javier; Khun, Timo; Afonso Rodriguez, Carmen Nieves; Recio Sanchez, Gonzalo; Martin Palma, Raul Jose (American Institute of Physics (AIP), 2014-05-14)
      Article
      Open Access
      This work reports on the fabrication of 1D fringed patterns on nanostructured porous silicon (nanoPS) layers (563, 372, and 290nm thick). The patterns are fabricated by phase-mask laser interference using single pulses of ...