Exploració per autor "Orpella García, Alberto"
Ara es mostren els items 39-58 de 85
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Impedance modeling of silica nanoparticle metal insulator metal capacitors
Véliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Orpella García, Alberto; Castañer Muñoz, Luis María (2018-08-01)
Article
Accés obertIn this study, we have fabricated metal-insulator-metal (MIM) capacitors where the insulator layer is made of 255¿nm diameter silica nanospheres. The MIM devices have been characterized and modeled by electrochemical ... -
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
Accés obertImpedance 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 ... -
Improvement of crystalline silicon surface passivation by hidrogen plasma treatment
Martín García, Isidro; Vetter, Michael; Orpella García, Alberto; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón; Kharchenko, A.V.; Roca i Cabarrocas, Pere (American Institute of Physics, 2004-03-01)
Article
Accés restringit per política de l'editorialA completely dry low-temperature process has been developed to passivate 3.3 Ωcm p-type crystalline silicon surface with excellent results. Particularly, we have investigated the use of a hydrogen plasma treatment, just ... -
In-situ doped amorphous Si0.8C0.2 emitter bipolar transistors
Orpella García, Alberto; Bardés Llorensí, Daniel; Alcubilla González, Ramón; Marsal, L F; Pallarès Marzal, Josep (1999-11)
Article
Accés obertThe fabrication and characterization of in situ-doped amorphous Si/sub 0.8/C/sub 0.2/ emitter transistors are presented. Emitter Gummel numbers exceeding 10/sup 14/ s/cm/sup 4/ are reported for the first time in this type ... -
Interdigitated back contacted c-Si(p) solar cells with photovoltaic efficiencies beyond 22%
Calle Prado, Eric; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Martín García, Isidro; Carrió, David; Masmitjà Rusiñol, Gerard; Voz Sánchez, Cristóbal; Orpella García, Alberto; Puigdollers i González, Joaquim; Alcubilla González, Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work we show a baseline fabrication process of interdigitated back contacted IBC c-Si(p) solar cells, which combines conventional diffusion oven stages to define base p+ and emitter n+/n++ regions at the back side, ... -
Investigation of the formation of silicon nanocrystals by annealing of amorphous SiCx/c-Si structures
Torres, I; Vetter, M; Ferré Burrull, José; Marsal, L F; Orpella García, Alberto; Alcubilla González, Ramón; Pallarès Marzal, Josep (2007-04)
Article
Accés restringit per política de l'editorialIn this work, we study the changes in the optical properties of 300-nm-thick hydrogenated amorphous silicon carbide layers after an annealing process. Both intrinsic and phosphorus-doped amorphous silicon carbide layers ... -
IR-study of a-SiCx:H and a-SiCxNy:H films for c-Si surface passivation
Vetter, Michael; Martín García, Isidro; Orpella García, Alberto; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Alcubilla González, Ramón (2004-03)
Article
Accés restringit per política de l'editorialAmorphous intrinsic silicon carbide (a-SiCx:H(i)) films and amorphous silicon carbonitride (SiCxNy:H) films have been deposited by plasma enhanced chemical vapor deposition from CH4/SiH4/(N2) plasma on n-type (1.5 O cm) ... -
Laboratori d'Electrònica i de Física
Prat Viñas, Lluís; Benadero García-Morato, Luis; Orpella García, Alberto; Turó Peroy, Antonio; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2009)
Pràctica
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Laboratori d'electrònica i física
Prat Viñas, Lluís; Benadero García-Morato, Luis; Orpella García, Alberto; Turó Peroy, Antonio; Voz Sánchez, Cristóbal (Universitat Politècnica de Catalunya, 2009)
Apunts
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Laser fired contacts on amorphous silicon deposited by hot-wire cvd on crystalline silicon
Blanque, S; Voz Sánchez, Cristóbal; Muñoz Cervantes, Delfina; Martín García, Isidro; Orpella García, Alberto; Puigdollers i González, Joaquim; Alcubilla González, Ramón (WIP Wirtschaft und Infrastruktur GmbH & Co. Planungs-KG, 2008)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work we study aluminium laser-fired contacts for intrinsic amorphous silicon layers deposited by Hot-Wire CVD. This structure could be used as an alternative low temperature back contact for rear passivated ... -
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)
Article
Accés restringit per política de l'editorialWe 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)
Article
Accés restringit per política de l'editorialIn 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 ... -
Low recombination n+ regions created by n+ c-Si epitaxial layers and laser processing of phosphorus-doped SiCx films
Martín García, Isidro; Colina Brito, Mónica Alejandra; Orpella García, Alberto; Voz Sánchez, Cristóbal; De Vecchi, S.; Desrues, T.; Abolmasov, S.; Roca i Cabarrocas, P.; Alcubilla González, Ramón (2012)
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Low temperature back-surface-field contacts deposited by hot-wire CVD for heterojunction solar cells
Muñoz Cervantes, Delfina; Voz Sánchez, Cristóbal; Martín García, Isidro; Orpella García, Alberto; Alcubilla González, Ramón; Villar, F; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Roca-I-Cabarrocas, P (2008-08)
Article
Accés obertThe growing interest in using thinner wafers (< 200 µm) requires the development of low temperature passivation strategies for the back contact of heterojunction solar cells. In this work, we investigate low temperature ... -
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)
Article
Accés obertMeasuring 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 ... -
Microcrystalline silicon thin film transistors obtained by hot-wire CVD
Puigdollers i González, Joaquim; Dosev, D; Orpella García, Alberto; Voz Sánchez, Cristóbal; Peiro, D; Bertomeu Balaguero, Joan; Marsal, L F; Pallarés, J; Andreu Batallé, Jordi; Alcubilla González, Ramón (1999-12)
Article
Accés restringit per política de l'editorialPolysilicon thin film transistors (TFT) are of great interest in the field of large area microelectronics, especially because of their application as active elements in flat panel displays. Different deposition techniques ... -
N-type emitters passivation through antireflective phosphorus doped a-SiCxNy:H(n) stacks
Orpella García, Alberto; Blanqué, Servane; Roiati, V.; Martín García, Isidro; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
Text en actes de congrés
Accés obertThis paper studies the passivation of industrially textured deep silicon emitters using amorphous silicon carbonitride layers in stack configuration, deposited by plasma enhanced chemical vapor deposition. With this ... -
N-type PTCDI¿C13H27 thin-film transistors deposited at different substrate temperature
Puigdollers i González, Joaquim; Pirriera, Della M; Marsal Vinade, Albert; Orpella García, Alberto; Cheylan, Stephanie; Voz Sánchez, Cristóbal; Alcubilla González, Ramón (2009-10)
Article
Accés restringit per política de l'editorialN-type organic thin-film transistors based on N,N'-ditridecylperylene-3,4,9,10-tetracarboxylic diimide have been fabricated by thermal evaporation at different substrate temperatures. The best device was obtained at 120 ... -
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)
Article
Accés obertRear 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 ... -
Ohmic contacts fabricated on moderately doped p-type GaAs by sputtering deposition and a laser-firing process
Boronat Moreiro, Alfredo; Silvestre Bergés, Santiago; Orpella García, Alberto (2013-09-12)
Article
Accés obertA novel approach is used to achieve ohmic contacts on moderately doped p-type GaAs substrates. A laser-firing process is used instead of the conventional annealing step. The morphology of the crater created by the laser-firing ...