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Ara es mostren els items 75-94 de 124

    • Laser Induced Forward Transfer for front contact improvement in silicon heterojunction solar cells 

      Colina Brito, Mónica Alejandra; Morales Vilches, Ana Belén; Voz Sánchez, Cristóbal; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Alcubilla González, Ramón (2015-05-01)
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      In this work the Laser Induced Forward Transfer (LIFT) technique is investigated to create n-doped regions on p-type c-Si substrates. The precursor source of LIFT consisted in a phosphorous-do ...

    • Laser processes for contact optimization in c-Si solar cells 

      Molpeceres Alvarez, Carlos; Muñoz Martín, D.; Sánchez Aniorte, M. Isabel; Morales Furio, Miguel; Colina Brito, Mónica Alejandra; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Alcubilla González, Ramón (2013)
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      Solid State Lasers (SSL) have been used in microelectronic and photovoltaic (PV) industry for decades but, currently, laser technology appears as a key enabling technology to improve efficiency and to reduce production ...

    • Laser processing of Al2O3/a-SiCx:H stacks: a feasible solution for the rear surface of high-efficiency p-type c-Si solar cells 

      Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Colina, Monica; Orpella García, Alberto; López, Gema; Alcubilla González, Ramón (2012-04-26)
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      We explore the potential of laser processing aluminium oxide (Al2O3)/amorphous silicon carbide (a-SiCx:H) stacks to be used at the rear surface of p-type crystalline silicon (c-Si) solar cells. For this stack, excellent ...

    • Laser-fired contact optimization in c-Si solar cells 

      Alcubilla González, Ramón; Ortega Villasclaras, Pablo Rafael; Orpella García, Alberto; Martín García, Isidro; Colina, M.; López Rodríguez, Gema; Voz Sánchez, Cristóbal; Sánchez, Isabel; Molpeceres, Carlos (2011-04-15)
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      In this work we study the optimization of laser-fired contact (LFC) processing parameters, namely laser power and number of pulses, based on the electrical resistance measurement of an aluminum single LFC point. LFC process ...

    • LIFT front-contact metallization of silicon solar cells 

      Canteli, David; Muñoz García, Cristina; Ortega Villasclaras, Pablo Rafael; Ros Costals, Eloi; Morales, Miguel; Lauzurica, Sara; Voz Sánchez, Cristóbal; Molpeceres Alvarez, Carlos (2021-08)
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      Laser-Induced Forward Transfer (LIFT) is a very versatile technique, allowing the selective transfer of a wide range of materials with no contact and high accuracy. This work includes the analysis of heterojunction silicon ...

    • 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
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      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 ...

    • Light harvesting photovoltaic mini-generator 

      Bermejo Broto, Sandra; Silvestre Bergés, Santiago; Ortega Villasclaras, Pablo Rafael; Herrera, Gerard (2011-08-23)
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      In this work, the design, fabrication and characterisation of a millimetre-size photovoltaic (PV) energy source is described. The fabrication process is based on p-type silicon-on-insulator wafers. It is shown that scaling ...

    • Long-term stability of Al2O3 passivated black silicon 

      Calle, Eric; Ortega Villasclaras, Pablo Rafael; von Gastrow, Guillaume; Martín García, Isidro; Savin, Hele; Alcubilla González, Ramón (Elsevier, 2016)
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      In this work we report on the long-term stability of black silicon surfaces passivated with atomic layer deposited (ALD) 20 nm thick Al2O3 films on p- and n-type FZ c-Si substrates. The results are directly compared with ...

    • Low surface recombination in silicon-heterojunction solar cells with rear laser-fired contacts from aluminum foils 

      Colina Brito, Mónica Alejandra; Morales Vilches, Ana Belén; Voz Sánchez, Cristóbal; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Alcubilla González, Ramón (2015-05-01)
      Article
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      In this study, an approach to create laser-fired contacts from aluminum foils is studied on p-type silicon-heterojunction solar cells. This alternative approach consists of the use of aluminum foils instead of evaporated ...

    • Low-cost high-sensitive suns-Voc measurement instrument to characterize c-Si solar cells 

      Ortega Villasclaras, Pablo Rafael; Piñol, Juan M.; Martín García, Isidro; Orpella García, Alberto; Masmitjà Rusiñol, Gerard; López Rodríguez, Gema; Ros Costals, Eloi; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón (2020-09-01)
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      Measuring open-circuit voltage (Voc) vs. light intensity (Suns) in solar cells permits the access of cell performance without the series resistance effect. This work shows the implementation of a Suns-Voc measurement system ...

    • Microscale characterization of surface recombination at the vicinity of laser-processed regions in c-Si solar cells 

      Roige, A; Osso, J.O; Martín García, Isidro; Voz Sánchez, Cristóbal; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Alcubilla González, Ramón; Vega, L. F (2016-03-01)
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      Laser firing processes have emerged as a technologically feasible approach for the fabrication of local point contacts or local doped regions in advanced high-efficiency crystalline-Si (c-Si) solar cells. In this work, we ...

    • 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)
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      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 ...

    • N-Type emitter surface passivaion in C-Si solar cells by means of antireflective amorphous Silicon Carbide layers 

      Ferré Tomas, Rafel; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Vetter, Michael; Torres, I; Alcubilla González, Ramón (American Institute of Physics (AIP), 2006-10)
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      Emitter saturation current densities (JOe) of phosphorus-diffused planar c-Si solar cell emitters passivated by silicon carbide (SiCx) layers have been determined in a wide sheet resistance range (20–500O/sq). Phosphorus ...

    • n-type emitter surface passivation in c-Si solar cells by means of antireflective amorphous silicon carbide layers 

      Ferré Tomas, Rafel; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Vetter, Michael; Torres, I.; Alcubilla González, Ramón (American Institute of Physics, 2006-10-05)
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      Emitter saturation current densities (JOe) of phosphorus-diffused planar c-Si solar cell emitters passivated by silicon carbide (SiCx) layers have been determined in a wide sheet resistance range (20-500 Ω/sp). Phosphorus ...

    • New laser-based approaches to improve the passivation and rear contact quality in high efficiency crystalline silicon solar cells 

      Molpeceres Alvarez, Carlos; Colina Brito, Mónica Alejandra; Muñoz Martín, D.; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Sánchez Aniorte, M. Isabel; Morales, Miguel; Lauzurica, Sara; García Ballesteros, Juan J.; Voz Sánchez, Cristóbal; López Rodríguez, Gema; Alcubilla González, Ramón (2013)
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    • Numerical simulations of rear point-contacted solar cells pn 2.2 Wcm p-type c-Si substrates 

      López González, Juan Miguel; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Orpella García, Alberto; Alcubilla González, Ramón (2013-07)
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      Rear surface of high-efficiency crystalline silicon solar cells is based on a combination of dielectric passivation and point-like contacts. In this work, we develop a 3D model for these devices based on 2.2 Ωcm p-type ...

    • Observation of photovoltaic effect within locally doped silicon nanojunctions using conductive probe AFM 

      Khoury, R.; Alvarez, José; Ohashi, T.; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Jin, Chen; Li, J.; Rusli, E.; Bulkin, P.; Johnson, E. V. (2020-10-01)
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      Accés obert
      Localized p-doped nanojunctions (200–300 nm in diameter) were formed in n-type crystalline silicon substrates and were characterized using scanning electron microscopy (SEM) and conductive-probe atomic force microscopy ...

    • Optimización de un Centro de Fusión CFAR para Sistemas Distribuidos RADAR 

      Ortega Villasclaras, Pablo Rafael; Elias Fusté, Antoni (1991)
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      Distributed detection theory is widely used in surveillance systems that recquire a large area of coverage and a large number of targets under consideration. In this paper an optimization algorithm for distributed systems ...

    • Optimization of al2o3 films obtained by ald to passivate p-type c-silicon wafers 

      López Rodríguez, Gema; Ortega Villasclaras, Pablo Rafael; Martín García, Isidro; Colina Brito, Mónica Alejandra; Orpella García, Alberto; Alcubilla González, Ramón (2012)
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    • Optimization of laser doping processes for the creation of p+ regions from solid dopant sources 

      Colina Brito, Mónica Alejandra; Martín García, Isidro; Voz Sánchez, Cristóbal; Morales Vilches, Ana Belén; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Orpella García, Alberto; Alcubilla González, Ramón; Sanchez Aniorte, Maria Isabel; Molpeceres Alvarez, Carlos (2012)
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