Now showing items 1-20 of 27

    • Atomic layer deposition of vanadium oxide films for crystalline silicon solar cells 

      Ros Costals, Eloi; Masmitjà Rusiñol, Gerard; Almache Hernández, Rosa Estefanía; Pusay Villarroel, Benjamín Andrés; Tiwari, Kunal; Saucedo Silva, Edgardo Ademar; Justin Raj, Chellan; Chul Kim, Byung; Puigdollers i González, Joaquim; Martín García, Isidro; Voz Sánchez, Cristóbal; Ortega Villasclaras, Pablo Rafael (Royal Society of Chemistry (RSC), 2022)
      Article
      Open Access
      Transition metal oxides (TMOs) are promising materials to develop selective contacts on high-efficiency crystalline silicon solar cells. Nevertheless, the standard deposition technique used for TMOs is thermal evaporation, ...
    • Deoxyribonucleic acid-based electron selective contact for crystalline silicon solar cells 

      Tom, Thomas; Ros Costals, Eloi; Rovira, David; Lopez Vidrier, Julià; Asensi López, José Miguel; Ortega Villasclaras, Pablo Rafael; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Bertomeu Balagueró, Joan (Wiley, 2023-02-10)
      Article
      Open Access
      Development of carrier selective contacts for crystalline silicon solar cells has been recently of great interest toward the further expansion of silicon photovoltaics. The use of new electron and hole selective layers has ...
    • Deposition and characterisation of sputtered molybdenum oxide thin films with hydrogen atmosphere 

      López-Pintó, Nicolau; Tom, Thomas; Bertomeu Bo, Joan; Asensi López, José Miguel; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal (2021-10)
      Article
      Open Access
      Sputtered films of reduced molybdenum oxide (MoOx) with a molybdenum trioxide target in different pressures and atmospheres were deposited in varying temperatures. Compositional, optic, and electric characteristics of the ...
    • Dielectric metal dielectric antireflection plasmonic layers 

      Ros Costals, Eloi (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Dielectric/Metal/Dielectric structures using Transition Metal Oxides (TMOs) as a dielectric layer and very thin-film layers of metal will be fabricated and their opto-electrical properties evaluated. In particular, ...
    • Effect of permanent dipole layers in the electrical characteristics of electronic devices and solar cells 

      Ros Costals, Eloi; Pusay Villarroel, Benjamín Andrés; Almache Hernández, Rosa Estefanía; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim (2019)
      Conference lecture
      Open Access
    • Examen final 

      Torrents Dolz, Josep M.; Pol Fernández, Clemente; Ros Costals, Eloi (Universitat Politècnica de Catalunya, 2021-06-15)
      Exam
      Restricted access to the UPC academic community
    • Expanding the perspective of polymeric selective contacts in photovoltaic devices using branched polyethylenimine 

      Ros Costals, Eloi; Tom, Thomas; Rovira Ferrer, David; Lopez Vidrier, Julià; Masmitjà Rusiñol, Gerard; Pusay Villarroel, Benjamín Andrés; Almache Hernández, Rosa Estefanía; Martín García, Isidro; Jiménez Guerra, Maykel; Saucedo Silva, Edgardo Ademar; Tormos, Eva; Asensi López, José Miguel; Ortega Villasclaras, Pablo Rafael; Bertomeu Balagueró, Joan; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal (American Chemical Society (ACS), 2022-09-05)
      Article
      Open Access
      This work studies the use of polymeric layers of polyethylenimine (PEI) as an interface modification of electron-selective contacts. A clearly enhanced electrical transport with lower contact resistance and significant ...
    • Germanium photovoltaic cells with MoO x hole-selective contacts 

      Alcañiz, A.; López Rodríguez, Gema; Martín García, Isidro; Jiménez Pagán, Alba; Datas Medina, Alejandro; Calle, Eric; Ros Costals, Eloi; Gerling Sarabia, Luis Guillermo; Voz Sánchez, Cristóbal; del Cañizo Nadal, Carlos; Alcubilla González, Ramón (2019-03-15)
      Article
      Open Access
      Very thin, thermally evaporated MoOx (x¿<¿3) layer has been used as transparent hole-selective contact on an n-type Germanium substrate to effectively demonstrate PV conversion capability. The fabricated MoOx/Ge heterojunction ...
    • Hole selective contacts based on transition metal oxides for c-Ge thermophotovoltaic devices 

      Martín García, Isidro; López Rodríguez, Gema; Garin Escriva, Moises; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim (2023-03-01)
      Article
      Open Access
      Thermophotovoltaics has become a very attractive solution for heat-to-electricity conversion due to its excellent conversion efficiencies. However, further research is needed to reduce the device cost which is typically ...
    • Impact of graphene monolayer on the performance of non-conventional silicon heterojunction solar cells with MoOx hole-selective contact 

      Ros Costals, Eloi; Fernández, Susana; Ortega Villasclaras, Pablo Rafael; Taboada Ceballos, Elena; Arnedo, Israel; Gandía Alabau, José Javier; Voz Sánchez, Cristóbal (Multidisciplinary Digital Publishing Institute (MDPI), 2023-01-31)
      Article
      Open Access
      In this work, a new design of transparent conductive electrode based on a graphene monolayer is evaluated. This hybrid electrode is incorporated into non-standard, high-efficiency crystalline silicon solar cells, where the ...
    • 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
      Open Access
      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 ...
    • Influence of a gold seed in transparent V2Ox/Ag/V2Ox selective contacts for dopant-free silicon solar cells 

      Nguyen, Hieu Trung; Ros Costals, Eloi; Bertomeu Balaguero, Joan; Asensi López, José Miguel; Andreu Batallé, Jordi; Martín García, Isidro; Ortega Villasclaras, Pablo Rafael; Garin Escriva, Moises; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Tom, Thomas (2018-11-05)
      Article
      Open Access
      Dielectric/metal/dielectric structures based on vanadium pentoxide with a thin silver interlayer have been optimized to replace traditional transparent electrodes. As would be expected, there is a tradeoff in the metal ...
    • Influence of co-sputtered Ag:Al ultra-thin layers in transparent V2O5/Ag:Al/AZO hole-selective electrodes for silicon solar cells 

      Tom, Thomas; Ros Costals, Eloi; Asensi López, José Miguel; Andreu Batallé, Jordi; Bertomeu Balagueró, Joan; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; López-Pintó, Nicolau (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-31)
      Article
      Open Access
      As optoelectronic devices continue to improve, control over film thickness has become crucial, especially in applications that require ultra-thin films. A variety of undesired effects may arise depending on the specific ...
    • Influence of wavelength and pulse duration on the selective laser ablation of WOx, VOx and MoOx thin films 

      Muñoz García, Cristina; Canteli, David; Lauzurica, Sara; Morales, Miguel; Molpeceres Alvarez, Carlos; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Voz Sánchez, Cristóbal (Elsevier, 2022-02-01)
      Article
      Open Access
      In this paper, we present a study of the laser scribing of WOx, VOx, and MoOx films, deposited onto crystalline silicon, with three different wavelengths (355 nm, 532 nm, and 1064 nm) and in two temporal regimes in pulse ...
    • Interdigitated back-contacted crystalline silicon solar cells fully manufactured with atomic layer deposited selective contacts 

      Masmitjà Rusiñol, Gerard; Ros Costals, Eloi; Almache Hernández, Rosa Estefanía; Pusay Villarroel, Benjamín Andrés; Martín García, Isidro; Voz Sánchez, Cristóbal; Saucedo Silva, Edgardo Ademar; Puigdollers i González, Joaquim; Ortega Villasclaras, Pablo Rafael (2022-04-02)
      Article
      Open Access
      The interdigitated back-contacted (IBC) solar cell concept has been extensively studied for single-junction cells and more recently as a good choice for three-terminal tandem devices. In this work, carrier-selective contacts ...
    • Inversion charge study in TMO hole-selective contact-based solar cells 

      García Hernansanz, Rodrigo; Pérez Centeno, F; Duarte Cano, Sebastián; Caudevilla Gutiérrez, Daniel; Algaidy, S.; Garcia Hemme, E.; Olea, J.; Pastor, D.; Del Prado, A.; San Andrés, E.; Martil, Ignacio; Ros Costals, Eloi; Puigdollers i González, Joaquim; Ortega Villasclaras, Pablo Rafael; Voz Sánchez, Cristóbal (2023-09)
      Article
      Open Access
      In this article, we study the effect of the inversion charge ( Q inv ) in a solar cell based on the hole-selective characteristic of substoichiometric molybdenum oxide (MoO x ) and vanadium oxide (VO x ) deposited directly ...
    • 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)
      Article
      Open Access
      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 ...
    • 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
      Open Access
      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 ...
    • 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 ...
    • Patterning of WOx, VOx, and MoOx thin-films with picosecond and nanosecond laser sources 

      Muñoz García, Cristina; Canteli, David; Lauzurica, Sara; Morales Furio, Miguel; Molpeceres Alvarez, Carlos; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Voz Sánchez, Cristóbal (Elsevier, 2022)
      Conference report
      Open Access
      Transition metal oxide (TMOs) layers have interesting properties as selective contacts, i.e., hole or electron transport layers for novel semiconductor devices. Especially, oxides of molybdenum (MoO3), vanadium (V2O5), and ...