Now showing items 1-20 of 36

    • A new approach for alkali incorporation in Cu2ZnSnS4 solar cells 

      Valdés, Matías; Sánchez González, Yudania; Fonoll Rubio, Robert; Placidi, Marcel Jose; Izquierdo Roca, Víctor; Cabas Vidani, Antonio; Mittiga, Alberto; Pistor, Paul; Malerba, Claudia; Saucedo Silva, Edgardo Ademar (2022-10-01)
      Article
      Open Access
      The addition of alkali elements has become mandatory for boosting solar cell performance in chalcogenide thin films based on kesterites (Cu2ZnSnS4, CZTS). A novel doping process is presented here, that consists in the ...
    • 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, ...
    • Bromine etching of kesterite thin films: perspectives in depth defect profiling and device performance improvement 

      Tiwari, Kunal; Jiménez Arguijo, Alex; Giraldo, Sergio; Placidi, Marcel Jose; Calvo-Barrio, L; Fonoll Rubio, Robert; Izquierdo Roca, Víctor; Sánchez González, Yudania; Perez Rodriguez, Alejandro; Saucedo Silva, Edgardo Ademar; Jehl Li-Kao, Zacharie (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Restricted access - publisher's policy
      Using a controlled bromine etching on kesterite absorbers, two major results are obtained. We establish the first defect depth profiling and secondary phases depth profiling of a state of the art Cu2ZnSnSe4 (CZTSe) film ...
    • Challenges and improvement pathways to develop quasi-1D (Sb1-xBix)2Se3-based materials for optically tuneable photovoltaic applications. Towards chalcogenide narrow-bandgap devices 

      Caño Prades, Ivan; Vidal Fuentes, Pedro; Gon Medaille, Axel; Jehl, Zacharie Victor Samuel Na; Jiménez Arguijo, Alex; Guc, Maxim; Izquierdo Roca, Víctor; Malerba, Claudia; Valentini, Matteo; Jiménez Guerra, Maykel; Placidi, Marcel Jose; Puigdollers i González, Joaquim; Saucedo Silva, Edgardo Ademar (2023-03-01)
      Article
      Open Access
      Quasi-1D chalcogenides have shown great promises in the development of emerging photovoltaic technologies. However, most quasi-1D semiconductors other than Sb2Se3 and Sb2S3 have been seldom investigated for energy generation ...
    • Combinatorial and machine learning approaches for the analysis of Cu2ZnGeSe4: influence of the off-stoichiometry on defect formation and solar cell performance 

      Grau Luque, Enric; Anefnaf, Ikram; Benhaddou, Nada; Fonoll Rubio, Robert; Becerril Romero, Ignacio; Aazou, Safae; Saucedo Silva, Edgardo Ademar; Sekkat, Zouheir; Pérez Rodríguez, Alejandro; Izquierdo Roca, Víctor; Guc, Maxim (Royal Society of Chemistry (RSC), 2021-04-28)
      Article
      Open Access
      Solar cells based on quaternary kesterite compounds like Cu2ZnGeSe4 are complex systems where the variation of one parameter can result in changes in the whole system, and, as consequence, in the global performance of the ...
    • Defect depth-profiling in kesterite absorber by means of chemical etching and surface analysis 

      Giraldo, Sergio; Calvo-Barrio, L; Placidi, Marcel Jose; Sánchez González, Yudania; Saucedo Silva, Edgardo Ademar; Jehl, Zacharie Victor Samuel Na (2021-02-28)
      Article
      Open Access
      A method to probe the depth morphology, defect profile and possible secondary phases in a thin film semiconductor is presented, taking a standard Kesterite film as an example. Using a top-down approach based on a previously ...
    • Does Sb2Se3 admit nonstoichiometric conditions? How modifying the overall se content affects the structural, optical, and optoelectronic properties of Sb2Se3 thin films 

      Caño Prades, Ivan; Vidal Fuentes, Pedro; Calvo Barrio, Lorenzo; Alcobé Olle, Xavier; Giraldo, Sergio; Sánchez González, Yudania; Jehl Li-Kao, Zacharie; Placidi, Marcel Jose; Puigdollers i González, Joaquim; Izquierdo Roca, Víctor; Saucedo Silva, Edgardo Ademar; Asensi López, José Miguel (2022-03-09)
      Article
      Open Access
      Sb2Se3 is a quasi-one-dimensional (1D) semiconductor, which has shown great promise in photovoltaics. However, its performance is currently limited by a high Voc deficit. Therefore, it is necessary to explore new strategies ...
    • Effect of post annealing thermal heating on Cu2ZnSnS4 solar cells processed by sputtering technique 

      Sánchez, M.F.; Sánchez, T.G.; Courel Piedrahita, Maykel; Reyes Vallejo, O; Sánchez, Yudania; Saucedo Silva, Edgardo Ademar; Sebastian, P.J. (2022-05-01)
      Article
      Open Access
      In this work, a detailed study of the effect of thermal treatment (hot plate) on a Mo/CZTS/CdS/i-ZnO/ITO solar cell was carried out, which promotes the diffusion of the Cd contained in the window layer of CdS towards the ...
    • Efficiency enhancement and doping type inversion in Cu2CdSnS4 solar cells by Ag substitution 

      Ibrahim, Ahmad; Lie, Stener; Tan, Joel Ming Riu; Swope, Ryan; Gon Medaille, Axel; Hadke, Shreyash; Saucedo Silva, Edgardo Ademar; Agrawal, Rakesh; Wong, Lydia H. (Royal Society of Chemistry (RSC), 2023-12-22)
      Article
      Open Access
      The main limiting factor of kesterite-related solar cells is the low open-circuit voltage (VOC) relative to their bandgap. This drawback has been correlated with the easily formed anti-site defects caused by similar ionic ...
    • 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 ...
    • Feasibility of a full chalcopyrite tandem solar cell: a quantitative numerical approach 

      Tiwari, Kunal; Giraldo, Sergio; Placidi, Marcel Jose; Gon Medaille, Axel; Saucedo Silva, Edgardo Ademar; Jehl Li-Kao, Zacharie (Wiley, 2021-07-08)
      Article
      Open Access
      The potential of tandem solar cells combining two chalcopyrite absorbers is evaluated using numerical modeling based on an exhaustive set of experimental parameters, offering a high degree of confidence in the numerical ...
    • High efficiency Cu2ZnSnS4 solar cells over FTO substrates and their CZTS/CdS interface passivation via thermal evaporation of Al2O3 

      Ojeda Durán, Esteban; Monfil Leyva, Karim; Andrade Arvizu, Jacob; Becerril Romero, Ignacio; Sánchez González, Yudania; Fonoll Rubio, Robert; Guc, Maxim; Jehl Li-Kao, Zacharie; Luna Lópeza, José A.; Saucedo Silva, Edgardo Ademar (Royal Society of Chemistry (RSC), 2021-04-28)
      Article
      Open Access
      The fabrication of soda lime glass/fluorine-doped tin oxide (SLG/FTO) transparent substrates represents an important advance in the fabrication of tandem solar cells. In addition, possible passivation using Al2O3, which ...
    • Hole Transport Layer based on atomic layer deposited V2Ox films: paving the road to semi-transparent CZTSe solar cells 

      Almache Hernández, Rosa Estefanía; Pusay Villarroel, Benjamín Andrés; Tiwari, Kunal; Ros, Eloi; Masmitjà Rusiñol, Gerard; Becerril Romero, Ignacio; Martín García, Isidro; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Saucedo Silva, Edgardo Ademar; Ortega Villasclaras, Pablo Rafael (2021-09-15)
      Article
      Open Access
      This work explores the use of very thin transparent vanadium oxide films deposited by atomic layer deposition (ALD) technique as hole transport layer for CZTSe solar cells as alternative of opaque molybdenum based contacts. ...
    • Influence of amorphous silicon carbide intermediate layer in the back-contact structure of Cu2ZnSnSe4 solar cells 

      Colina Brito, Mónica Alejandra; Martín García, Isidro; Giraldo, Sergio; Sánchez González, Yudania; Kondrotas, Rokas; Oliva, Florian; Izquierdo Roca, Víctor; Pérez Rodríguez, Alejandro; Coll Valentí, Arnau; Alcubilla González, Ramón; Saucedo Silva, Edgardo Ademar (2016-08-01)
      Article
      Open Access
      Cu2 ZnSn(S1-ySey )4 (CZTS) thin-film solar cells have been qualified as potential competitors of the more established CIGS ones. One of the more important handicaps of CZTS solar cells is the open-circuit voltage deficit. ...
    • Insights into interface and bulk defects in a high efficiency kesterite-based device 

      Fonoll Rubio, Robert; Andrade Arvizu, Jacob; Blanco Portals, Javier; Becerril Romero, Ignacio; Guc, Maxim; Saucedo Silva, Edgardo Ademar; Peiró Martínez, Francesca; Estradé Albiol, Sònia; Izquierdo Roca, Víctor; Pérez Rodríguez, Alejandro (2021-01-01)
      Article
      Open Access
      This work provides a detailed analysis of a high efficiency Cu2ZnSnSe4 device using a combination of advanced electron microscopy and spectroscopy techniques. In particular, a full picture of the different defects present ...
    • Insights on the limiting factors of Cu2ZnGeSe4 based solar cells 

      Anefnaf, Ikram; Aazou, Safae; Vidal Fuentes, Pedro; Fonoll Rubio, Robert; Tiwari, Ashish Kumar; Jehl Li-Kao, Zacharie; Guc, Maxim; Saucedo Silva, Edgardo Ademar; Sekkat, Zouheir (2021-08-01)
      Article
      Open Access
      Germanium-based wide band gap kesterite semiconductor Cu2ZnGe(S,Se)4 (CZGeSSe) is considered a very promising absorber compound as top cell in tandem devices. Autonomy to tailor the band gap from ~1.47 eV (Cu2ZnGeSe4-CZGeSe) ...
    • Insights on the thermal stability of the Sb2Se3 quasi-1D photovoltaic technology 

      Vidal Fuentes, Pedro; Guc, Maxim; Becerril Romero, Ignacio; Sylla, Dioulde Huguette; Alcobé Olle, Xavier; Sánchez González, Yudania; Pérez Rodríguez, Alejandro; Saucedo Silva, Edgardo Ademar; Izquierdo Roca, Víctor (Wiley, 2021-10-13)
      Article
      Open Access
      This work explores the thermal stability of antimony-based photovoltaic (PV) technologies investigating the effect of low-temperature (50—350¿°C) postdeposition annealings (PDAs) on bare Sb2Se3 absorbers and complete ...
    • 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 ...
    • Investigation on limiting factors affecting Cu2ZnGeSe4 efficiency: Effect of annealing conditions and surface treatment 

      Sánchez González, Yudania; Andrade Arvizu, Jacob; Becerril Romero, Ignacio; Guc, Maxim; Giraldo, Sergio; Izquierdo Roca, Víctor; Saucedo Silva, Edgardo Ademar (2020-10-01)
      Article
      Open Access
      This work aims to unveil the optimal annealing conditions and surface treatments of CZGeSe absorbers, synthesized using vacuum-based deposition technique, with an eye to optimizing the main parameters allowing better control ...
    • KCN chemical etching of van der Waals Sb2Se3 thin films synthesized at low temperature leads to inverted surface polarity and improved solar cell efficiency 

      Jiménez Guerra, Maykel; Calvo Barrio, Lorenzo; Asensi López, José Miguel; Caño Prades, Ivan; Yan, Shunya; Barrena Villas, Esther; Puigdollers i González, Joaquim; Jehl, Zacharie Victor Samuel Na; Sánchez González, Yudania; Saucedo Silva, Edgardo Ademar (American Chemical Society (ACS), 2024-01-22)
      Article
      Open Access
      Recent developments in Sb2Se3 van der Waals material as an absorber candidate for thin film photovoltaic applications have demonstrated the importance of surface management for improving the conversion efficiency of this ...