Now showing items 1-20 of 116

    • A compact tetrathiafulvalene-benzothiadiazole dyad and its highly symmetrical charge-transfer salt: Ordered donor p-stacks closely bound to their acceptors 

      Geng, Yan; Pfattner, Raphael; Campos García, Antonio; Hauser, Jürg; Laukhin, Vladimir N.; Puigdollers i González, Joaquim; Veciana Miró, Jaume; Mas Torrent, Marta; Rovira Angulo, Concepció; Decurtins, Silvio; Liu, Shixia (2014-06-02)
      Article
      Restricted access - publisher's policy
      A compact and planar donor-acceptor molecule 1 comprising tetrathiafulvalene (TTF) and benzothiadiazole (BTD) units has been synthesised and experimentally characterised by structural, optical, and electrochemical methods. ...
    • A critical analysis on the role of back surface passivation for a-Si/c-Si heterojunction solar cells 

      Chatterji, N; Khatavkar, Sanchit; Voz Sánchez, Cristóbal; Morales Vilches, Ana Belén; Puigdollers i González, Joaquim; Mohan Arora, Brij; Antony, Aldrin; Naip, Praadep R (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference lecture
      Restricted access - publisher's policy
      Back surface passivation is a well-known method to reduce carrier recombination and hence improves the efficiency of crystalline silicon solar cells. In this manuscript, we critically analyze the role of this process for ...
    • A rapid, low-cost, and scalable technique for printing state-of-the-art organic field-effcet transistors 

      Temiño, Inés; Del Pozo León, Freddy; Ajayakumar, M.R.; Galindo Lorente, Sergi; Puigdollers i González, Joaquim; Mas Torrent, Marta (2016-06-13)
      Article
      Open Access
      In the last few years exciting advances have been achieved in developing printing techniques for organic semiconductors, and impressive mobility values have been reported for the resulting organic field-effect transistors ...
    • A self-branched lamination of hierarchical patronite nanoarchitectures on carbon fiber cloth as novel electrode for ionic liquid electrolyte-based high energy density supercapacitors 

      Manikandan, Ramu; Justin Raj, Chellan; Nagaraju, Goli; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal (2019-11-14)
      Article
      Open Access
      The developments of rationally designed binder-free metal chalcogenides decorated flexible electrodes are of paramount importance for advanced energy storage devices. Herein, binder-free patronite (VS4) flower-like ...
    • Air stable organic semiconductors based on diindolo[3,2-a:3',2'-c]carbazole 

      Cuadrado Santolaria, Alba; Cuesta, Jessica; Puigdollers i González, Joaquim; Velasco Castrillo, Maria Dolores (2018-11-01)
      Article
      Open Access
      The extension of the p-conjugated 10,15-dihydro-5H-diindolo[3,2-a:3',2'-c]carbazole (triindole) system via the introduction of donor moieties of different nature (phenyl, naphthyl, methylthiophenyl and benzo[b]thienyl) at ...
    • Analysis of bias stress on thin-film transistors obtained by Hot-Wire Chemical Vapour Deposition 

      Dosev, D K; Puigdollers i González, Joaquim; Orpella García, Alberto; Voz Sánchez, Cristóbal; Fonrodona, Marta; Soler Vilamitjana, David; Marsal, L F; Pallarès Marzal, Josep; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Alcubilla González, Ramón (2001-02)
      Article
      Open Access
      The stability under gate bias stress of unpassivated thin film transistors was studied by measuring the transfer and output characteristics at different temperatures. The active layer of these devices consisted of in ...
    • Analysis of GaAs-Ti thin films deposited by sputtering onto c-Si and GaAs 

      Silvestre Bergés, Santiago; Puigdollers i González, Joaquim; Boronat, A.; Castañer Muñoz, Luis María (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
      Conference lecture
      Open Access
      Some sputtering processes of GaAs and Ti onto glass, c-Si and c-GaAs substrates have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents first ...
    • Analysis of temperature dependent current-voltage and capacitance-voltage characteristics of an Au/V2O5/ n -Si Schottky diode 

      Mahato, Somnath; Biswas, Debaleen; Gerling Sarabia, Luis Guillermo; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim (2017-08-01)
      Article
      Open Access
      Electronic properties of Au/V2O5/n-Si Schottky device have been investigated by temperature dependent current-voltage (I-V) and capacitance-voltage (C-V) measurements ranging from 300 K to 150 K. Ideality factor (n) and ...
    • Analysis of the dynamic short-circuit resistance in organic bulk-heterojunction solar cells: relation to the charge carrier collection efficiency 

      Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Asensi López, José Miguel; Galindo Lorente, Sergi; Cheylan, S.; Pacios, R.; Ortega Villasclaras, Pablo Rafael; Alcubilla González, Ramón (2013-06)
      Article
      Restricted access - publisher's policy
      This work studies the charge carrier collection efficiency in organic bulk-heterojunction solar cells based on polymer:fullerene blends. An equivalent circuit with a specific recombination term is proposed to describe the ...
    • Back junction n-type silicon heterojunction solar cells with V2O5 hole-selective contact 

      Gerling Sarabia, Luis Guillermo; Masmitjà Rusiñol, Gerard; Voz Sánchez, Cristóbal; Ortega Villasclaras, Pablo Rafael; Puigdollers i González, Joaquim; Alcubilla González, Ramón (Elsevier, 2016)
      Conference lecture
      Open Access
    • Bifacial heterojunction silicon solar cells by Hot-Wire CVD with open circuit voltage exceeding 600 mV 

      Voz Sánchez, Cristóbal; Muñoz Cervantes, Delfina; Fonrodona, Marta; Martín García, Isidro; Puigdollers i González, Joaquim; Alcubilla González, Ramón; Escarré, Jordi; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi (2006-07)
      Article
      Restricted access - publisher's policy
      Double-sided (bifacial) heterojunction silicon solar cells have been fabricated by Hot-Wire CVD on both p- and n-type crystalline silicon substrates. In these devices, doped microcrystalline silicon layers are combined ...
    • Células fotovoltaicas con un rendimiento del 20.5% 

      Alcubilla González, Ramón; García Molina, Francisco Miguel; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Orpella García, Alberto; Martín García, Isidro; Colina, M.; Voz Sánchez, Cristóbal; Bermejo Broto, Sandra; Puigdollers i González, Joaquim (Grupo Acorde Comunicación (GAC), 2011-03-01)
      Article
      Restricted access - publisher's policy
      Un grupo de investigadores de la Universitat Politècnica de Catalunya (UPC) han desarrollado un proceso de fabricación que permite obtener rendimientos de conversión fotovoltaicos del 20,5%. Esto supone una mejora sustancial ...
    • Characterization and application of a-SiCx:H films for the passivation of the c-Si surface 

      Martín Campos, Ignacio Clemente; Vetter, M; Orpella García, Alberto; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Marsal, L F; Pallarès Marzal, Josep; Alcubilla González, Ramón (2002-01)
      Article
      Restricted access - publisher's policy
      In this work we investigate the effects of typical thermal treatments on c-Si surface passivation by intrinsic a-SiCx:H films. First, a forming gas anneal (FGA), (400 °C, 30 min in H2/N2) is applied resulting in an improvement ...
    • Characterization and modeling of organic thin-film transistors based pi-conjugated small molecule tetraphenyldibenzoperiflanthene: effects of channel length 

      Boukhili, W.; Mahdouani, M.; Bourguiga, R.; Puigdollers i González, Joaquim (2016-07-01)
      Article
      Open Access
      P-type organic thin film transistors (OTFTs) with different channel lengths have been fabricated and characterized by thermal evaporation using the small tetraphenyldibenzoperiflanthene (DBP) as an active material on Si/SiO2 ...
    • Characterization of bifacial heterojunction Silicon solar cells obtained by Hot-Wire CVD 

      Muñoz Cervantes, Delfina; Voz Sánchez, Cristóbal; Fonrodona, Marta; Garin Escriva, Moises; Orpella García, Alberto; Vetter, Michael; Puigdollers i González, Joaquim; Alcubilla González, Ramón; Villar, F; Bertoeu, J; Andreu Batallé, Jordi (2006-07)
      Article
      Restricted access - publisher's policy
      In this work, we study bifacial heterojunction silicon solar cells fabricated by hot-wire CVD on both p- and n-type crystalline silicon substrates. In these devices, hydrogenated microcrystalline silicon doped layers are ...
    • Characterization of transition metal Oxide/Silicon heterojunctions for solar cell applications 

      Gerling Sarabia, Luis Guillermo; Mahato, Somnath; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Puigdollers i González, Joaquim (2015-10-09)
      Article
      Open Access
      During the last decade, transition metal oxides have been actively investigated as hole- and electron-selective materials in organic electronics due to their low-cost processing. In this study, four transition metal oxides ...
    • Comparison between the density-of-states of picene transistors measured in air and under vacuum 

      Voz Sánchez, Cristóbal; Marsal, Albert; Moreno Sierra, César; Puigdollers i González, Joaquim; Alcubilla González, Ramón (2012-01)
      Article
      Restricted access - publisher's policy
      Picene has recently attracted much attention as the active layer in organic thin-film transistors because of its good performance in air. In this work, we have fabricated picene thin-film transistors that exhibit field-effect ...
    • Comparison of simulation models for Perovskite solar cells 

      Silvestre Bergés, Santiago; Mas-Marza, Elena; Puigdollers i González, Joaquim; Fabregat-Santiago, Francisco; Alfonso, Valero G (WIP Renewable Energies, 2016)
      Conference report
      Restricted access - publisher's policy
      In this work, a comparison of two models for the simulation of the electrical behavior of perovskite solar cells is presented. The two models considered are the well-known one diode model and an analytical model recently ...
    • Compositional influence on the electrical performance of zinc indium tin oxide transparent thin-film transistors 

      Marsal Vinade, Albert; Carreras Seguí, Paz; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Galindo Lorente, Sergi; Alcubilla González, Ramón; Bertomeu Balaguero, Joan; Antony, Aldrin (2014-03-31)
      Article
      Restricted access - publisher's policy
      In this work, zinc indium tin oxide layers with different compositions are used as the active layer of thin film transistors. This multicomponent transparent conductive oxide is gaining great interest due to its reduced ...
    • Copper phthalocyanine thin filma transistors with polymeric gate dielectric 

      Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Fonrodona, Marta; Cheylan, Stephanie; Stella, M; Andreu Batallé, Jordi; Vetter, Michael; Alcubilla González, Ramón (2006-06)
      Article
      Restricted access - publisher's policy
      Copper phthalocyanine (CuPc) thin-film transistors have been fabricated using polymethyl methacrylate (PMMA) as gate dielectric. A bottom gate, staggered structure was selected to study the device performance. CuPc thin-films ...