Enviaments recents

  • Spatial Filters on Demand Based on Aperiodic Photonic Crystals 

    Gailevicius, Darius; Purlys, Vytautas; Peckus, Martynas; Gadonas, Roaldas; Staliunas, Kestutis (2017-08-01)
    Article
    Accés restringit per política de l'editorial
    Photonic Crystal spatial filters, apart from stand-alone spatial filtering function, can also suppress multi-transverse-mode operation in laser resonators. Here it is shown that such photonic crystals can be designed by ...
  • An indium tin oxide-free polymer solar cell on flexible glass 

    Formica, Nadia; Mantilla Perez, Paola; Ghosh, Dhriti Sundar; Janner, Davide; Chen, T. L.; Huang, Minghuang; Garner, Sean; Martorell Pena, Jordi; Pruneri, Valerio (2015-02-05)
    Article
    Accés obert
    Future optoelectronic devices and their low-cost roll-to-roll production require mechanically flexible transparent electrodes (TEs) and substrate materials. Indium tin oxide (ITO) is the most widely used TE because of its ...
  • 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
    Accés restringit per política de l'editorial
    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, ...
  • 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
    Accés obert
    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 ...
  • Neutral water splitting catalysis with a high FF triple junction polymer cell 

    Elias Pera, Xavier; Liu, Quan; Gimbert-Surinach, Carolina; Matheu, Roc; Mantilla Perez, Paola; Martinez Otero, Alberto; Martorell Pena, Jordi (2016-04-15)
    Article
    Accés obert
    We report a photovoltaics-electrochemical (PV-EC) assembly based on a compact and easily processable triple homojunction polymer cell with high fill factor (76%), optimized conversion efficiencies up to 8.7%, and enough ...
  • Predictability of extreme intensity pulses in optically injected semiconductor lasers 

    Martinez Alvarez, Nuria; Borkar, Saurabh; Masoller Alonso, Cristina (2017-06-21)
    Article
    Accés restringit per política de l'editorial
    The predictability of extreme intensity pulses emitted by an optically injected semiconductor laser is studied numerically, by using a well-known rate equation model. We show that symbolic ordinal time-series analysis ...
  • 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
    Accés obert
    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 ...
  • 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
    Accés obert
    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 ...
  • 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
    Accés obert
    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 ...
  • Highly flexible transparent electrodes containing ultrathin silver for efficient polymer solar cells 

    Ghosh, Dhriti Sundar; Liu, Quansheng; Mantilla Perez, Paola; Chen, T. L.; Mkhitaryan, Vahagn; Huang, Minghuang; Garner, Sean; Martorell Pena, Jordi; Pruneri, Valerio (2015-12-16)
    Article
    Accés obert
    Transparent electrodes (TEs) having electrooptical trade-offs better than state-of-the-art indium tin oxide (ITO) are continuously sought as they are essential to enable flexible electronic and optoelectronic devices. In ...

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