Now showing items 1-11 of 11

    • 4-terminal tandem photovoltaic cell using two layers of PTB7:PC71BM for optimal light absorption 

      Mantilla Perez, Paola; Martinez Otero, Alberto; Romero Gómez, Pablo; Martorell Pena, Jordi (2015-08-26)
      Article
      Open Access
      A 4-terminal architecture is proposed in which two thin active layers (<100 nm) of PTB7:PC71BM are deposited on a two-sided ITO covered glass substrate. By modeling the electric field distribution inside the multilayer ...
    • A two-resonance tapping cavity for an optimal light trapping in thin-film solar cells 

      Liu, Quan; Romero Gómez, Pablo; Mantilla Perez, Paola; Colodrero, Silvia; Toudert, Johann; Martorell Pena, Jordi (2017-09-20)
      Article
      Open Access
      An optimal photon absorption in thin film photovoltaic technologies can only be reached by effectively trapping the light in the absorber layer provided a considerable portion of the photons is rejected or scattered out ...
    • Enhanced light harvesting in semitransparent organic solar cells using an optical metal cavity configuration 

      Pastorelli, Francesco; Romero Gómez, Pablo; Betancur Lopera, Rafael; Martinez Otero, Alberto; Mantilla Perez, Paola; Bonod, Nicolas; Martorell Pena, Jordi (2015-01-21)
      Article
      Open Access
      An optical metal cavity configuration is used to trap near infrared light in a semitransparent organic solar cell. The efficiency for such cell, which has a higher than 20% transparency in the visible region, is equal to ...
    • Enhanced stability in semi-transparent PTB7/PC71BM photovoltaic cells 

      Romero Gómez, Pablo; Betancur Lopera, Rafael; Martinez Otero, Alberto; Elias Pera, Xavier; Mariano, Marina; Romero, Beatriz; Arredondo, Belen; Vergaz, Ricardo; Martorell Pena, Jordi (2015-06-01)
      Article
      Open Access
      We studied the performance over time of opaque and semi-transparent PTB7:PC71BM bulk heterojunction solar cells. For unsealed inverted configuration cells we observe that when the isolation from the environment is improved, ...
    • Intermittent chaos for ergodic light trapping in a photonic fiber plate 

      Mariano, Marina; Kozyreff, Gregory; Gerling Sarabia, Luis Guillermo; Romero Gómez, Pablo; Puigdollers i González, Joaquim; Bravo Abad, Jorge; Martorell, Jordi (2016-12-30)
      Article
      Open Access
      Extracting the light trapped in a waveguide, or the opposite effect of trapping light in a thin region and guiding it perpendicular to its incident propagation direction, is essential for optimal energetic performance in ...
    • Light coupling into the Whispering Gallery Modes of a fiber array thin film solar cell for fixed partial Sun tracking 

      Mariano, Marina; Rodriguez, Francisco J.; Romero Gómez, Pablo; Kozyreff, Gregory; Martorell Pena, Jordi (MACMILLAN PUBLISHERS LIMITED, 2014-05-14)
      Article
      Open Access
      We propose the use of whispering gallery mode coupling in a novel configuration based on implementing a thin film cell on the backside of an array of parallel fibers. We performed numerical calculations using the parameters ...
    • Monitoring degradation mechanisms in PTB7:PC71BM photovoltaic cells by means of impedance spectroscopy 

      Arredondo, Belen; Martin Lopez, Maria B.; Romero, Beatriz; Vergaz, Ricardo; Romero Gómez, Pablo; Martorell Pena, Jordi (2015-10-23)
      Article
      Open Access
      We have used impedance spectroscopy technique to monitor degradation mechanisms in organic solar cells based on a blend of PTB7:PC71BM. We have measured the impedance of the cell on a periodical basis for almost four months, ...
    • Nanoparticle assisted mechanical delamination for freestanding high performance organic devices 

      Colodrero, Silvia; Romero Gómez, Pablo; Mantilla Perez, Paola; Martorell Pena, Jordi (2017-01-12)
      Article
      Open Access
      Organic electronics has the potential to be incorporated in any kind of surface morphology for wearable or fully portable applications. Unfortunately when organic devices, such as solar cells, are fabricated on flexible ...
    • Semi-transparent polymer solar cells 

      Romero Gómez, Pablo; Pastorelli, Francesco; Mantilla Perez, Paola; Mariano, Marina; Martinez Otero, Alberto; Elias Pera, Xavier; Betancur Lopera, Rafael; Martorell Pena, Jordi (2015-02-16)
      Article
      Open Access
      Over the last three decades, progress in the organic photovoltaic field has resulted in some device features which make organic cells applicable in electricity generation configurations where the standard silicon-based ...
    • Transparent polymer solar cells emplotings a layered light-trapping architecture 

      Betancur, Rafael; Romero Gómez, Pablo; Martinez Otero, Alberto; Elias Pera, Xavier; Maymó Camós, Marc; Martorell Pena, Jordi (2013-10)
      Article
      Restricted access - publisher's policy
      Organic solar cells have unique properties that make them very attractive as a renewable energy source. Of particular interest are semi-transparent cells, which have the potential to be integrated into building fac¸ades ...
    • UV-induced oxygen removal for photostable, high-efficiency PTB7-Th:PC71BM photovoltaic cells 

      Liu, Quan; Mantilla Perez, Paola; Montes Bajo, Miguel; Romero Gómez, Pablo; Martorell Pena, Jordi (2016-10-03)
      Article
      Open Access
      Solution-processed ZnO sol–gel or nanoparticles are widely used as the electron-transporting layer (ETL) in optoelectronic devices. However, chemisorbed oxygen on the ZnO layer surface has been shown to be detrimental for ...