Recent Submissions

  • 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
    Restricted access - publisher's policy
    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 ...
  • Macroporous silicon coated with M/TiO2 (M=Au,Pt) as a highly efficient photoreactor for hydrogen production 

    Serafin, Jaroslaw; Soler Turu, Lluís; Vega Bru, Didac; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-03-07)
    Article
    Restricted access - publisher's policy
    Macroporous silicon disks containing ordered channels of 2 µm side and 0.2 mm length (9 × 106 channels cm-2) have been functionalized with a thin layer of Au/TiO2 and Pt/TiO2 photocatalysts and tested in the photoproduction ...
  • Multicrystalline silicon thin-film solar cells based on vanadium oxide heterojunction and laser-doped contacts 

    Martín García, Isidro; López Rodríguez, Gema; Plentz, Jonathan; Jin, Chen; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Gawlik, Annet; Jia, Guobin; Andrä, Gudrun (2019-10)
    Article
    Restricted access - publisher's policy
    Liquid phase crystallized (LPC) silicon thin films on glass substrates are a feasible alternative to conventional crystalline silicon (c-Si) wafers for solar cells. Due to substrate limitation, a low-temperature technology ...
  • Improved electron selectivity in silicon solar cells by cathode modification with a dipolar conjugated polyelectrolyte interlayer 

    Ros Costals, Eloi; Barquera Bibiano, Zaira; Ortega Villasclaras, Pablo Rafael; Gerling Sarabia, Luis Guillermo; Masmitjà Rusiñol, Gerard; Martín García, Isidro; Alcubilla González, Ramón; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal (2019-01-01)
    Article
    Restricted access - publisher's policy
    This work studies a novel electron-selective contact for n-type silicon solar cells based on the modification of the cathode with a polymeric interlayer. Specifically, a thin layer of the conjugated polyelectrolyte PFN is ...
  • Absorption mechanisms in macroporous silicon photonic crystals 

    Segura García, Daniel; Cardador Maza, David; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (Elsevier, 2019-01-01)
    Article
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    We investigate the large differences classically found in literature between theoretical and empirical results in the optical characterization of macroporous silicon photonic crystals. Mainly, we study the impact of two ...
  • Empirical demonstration of CO2 detection using macroporous silicon photonic crystals as selective thermal emitters 

    Cardador Maza, David; Segura García, Daniel; Deriziotis, Ioannis; Garin Escriva, Moises; Llorca Piqué, Jordi; Rodríguez Martínez, Ángel (2019-09-15)
    Article
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    This study describes the detection of CO2 using macroporous silicon photonic crystals as thermal emitters. It demonstrates that the reduction of structural nonhomogeneities leads to an improvement of the photonic crystals’ ...
  • Macroporous silicon filters, a versatile platform for NDIR spectroscopic gas sensing in the MIR 

    Cardador Maza, David; Segura García, Daniel; Deriziotis, Ioannis; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2019-07-23)
    Article
    Open Access
    This paper describes the spectroscopic detection of gases using macroporous silicon photonic crystals as narrow filters. The study begins by demonstrating the feasibility of photoelectrochemical etching to fabricate narrow ...
  • Impedance spectroscopy interpretation of silica and polystyrene colloidal suspensions 

    Véliz Noboa, Bremnen Marino; Orpella García, Alberto; Domínguez Pumar, Manuel; Bermejo Broto, Sandra (2020-03-01)
    Article
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    Impedance spectroscopy differences between colloidal 295-nm silica and 300-nm polystyrene nanoparticles in deionized water are analyzed in this work. Using two different two-electrode measurement setups, designed for this ...
  • Large area deposition of ordered nanoparticle layers by electrospray 

    Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Vives, Jordi; Castañer Muñoz, Luis María (2018-07-01)
    Article
    Restricted access - publisher's policy
    Mass production of ordered nanostructures with enhanced optical properties such as colloidal crystals for applications such as solar cells or organic light emitted diodes demands low-cost and large-scale manufacturing ...
  • Satisfying both interfacial- and bulk requirements for organic photovoltaics: Bridged-triphenylamines with extended p-conjugated systems as efficient new molecules 

    Simokaitiene, Jurate; Cekaviciute, Monika; Volyniuk, Dmytro; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim (2019-05-31)
    Article
    Restricted access - publisher's policy
    In the domain of organic photovoltaic (OPV) devices, the design of new materials faces the extraordinary challenge to satisfy two opposite requirements: the new materials should exhibit weak intermolecular interactions at ...
  • Black silicon back-contact module with wide light acceptance angle 

    Ortega Villasclaras, Pablo Rafael; Garín, Moisés; von Gastrow, Guillaume; Carrió Díaz, David; Alcubilla González, Ramón (2019-01-01)
    Article
    Open Access
    In this work, a photovoltaic mini-module combining interdigitated back-contacted solar cells with black silicon in the front was implemented as a proof of concept. The module consists of nine solar cells connected in series ...
  • Origin of the negative differential resistance in the output characteristics of a picene-based thin-film transistor 

    Ros Costals, Eloi; Puigdollers i González, Joaquim; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-09)
    Article
    Open Access
    In this work, we have fabricated and studied p-type picene thin-film transistors. Although the devices exhibited good electrical performance with high field-effect mobility (up to 1.3 cm 2 /V·s) and on/off ratios above 10 ...

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