Now showing items 1-20 of 26

    • 2-step process for 5.4% CuGaSe2 solar cell using fluorine doped tin oxide transparent back contacts 

      Thomere, Angélica; Placidi, Marcel Jose; Guc, Maxim; Tiwari, Kunal Jogendra; Fonoll Rubio, Robert; Izquierdo Roca, Víctor; Perez Rodriguez, Alejandro; Jehl Li-Kao, Zacharie (2023)
      Article
      Open Access
      As single-junction solar cells are approaching theoretical limits, multijunction solar cells are becoming increasingly relevant, and low-cost wider bandgap light harvesters in tandem with silicon are the next frontier in ...
    • 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 ...
    • Bromine etching of kesterite thin films: perspectives in depth defect profiling and device performance improvement 

      Tiwari, Kunal Jogendra; 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 ...
    • Characterization of the stability of indium tin oxide and functional layers for semitransparent back-contact applications on Cu(in,Ga)Se2 solar cells 

      Fonoll Rubio, Robert; Placidi, Marcel Jose; Hoelscher, Torsten; Thomere, Angélica; Jehl Li-Kao, Zacharie; Guc, Maxim; Izquierdo Roca, Víctor; Scheer, Roland; Perez Rodriguez, Alejandro (Wiley, 2022-07-08)
      Article
      Open Access
      Herein, a detailed study of the stability of different ITO-based back-contact configurations (including bare ITO contacts and contacts functionalized with nanometric Mo, MoSe2, and MoS2 layers) under the coevaporation ...
    • Controlling the anionic ratio and gradient in kesterite technology 

      Andrade Arvizu, Jacob; Fonoll Rubio, Robert; Izquierdo Roca, Víctor; Becerril Romero, Ignacio; Sylla, Dioulde Huguette; Vidal Fuentes, Pedro; Jehl Li-Kao, Zacharie; Thomere, Angélica; Giraldo, Sergio; Tiwari, Kunal Jogendra; Resalati, Shahaboddin; Guc, Maxim; Placidi, Marcel Jose (2022-01-03)
      Article
      Open Access
      Accurate anionic control during the formation of chalcogenide solid solutions is fundamental for tuning the physicochemical properties of this class of materials. Compositional grading is the key aspect of band gap engineering ...
    • Cu2ZnSnSe4-based solar cells with efficiency exceeding 10% by adding a superficial Ge nanolayer: the interaction between Ge and Na 

      Giraldo Muñoz, Sergio; Placidi, Marcel Jose; Pistor, Paul; Saucedo Silva, Edgardo Ademar (2016-05)
      Article
      Open Access
      Recently, beneficial effects of the incorporation of small amounts of Ge into Cu2ZnSnSe4 (CZTSe)-based solar cells have been reported, showing that the presence of Ge can enhance the crystalline properties of CZTSe, assisting ...
    • 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 ...
    • Effects of ITO based back contacts on Cu(In,Ga)Se2 thin films, solar cells, and mini-modules relevant for semi-transparent building integrated photovoltaics 

      Hölscher, Torsten; Placidi, Marcel Jose; Becerril Romero, Ignacio; Fonoll Rubio, Robert; Izquierdo Roca, Víctor; Thomere, Angélica; Bailo Bobi, Eduard; Schneider, Thomas; Kempa, Heiko; Scheer, Roland; Perez Rodriguez, Alejandro (2023-03-01)
      Article
      Open Access
      This study presents the results of the development of semi-transparent Cu(In,Ga)Se2 (CIGSe) mini-modules for the application in building integrated photovoltaics (BIPV). Applying in-situ X-ray diffraction in real-time ...
    • Electron beam lithography for direct patterning of MoS2on PDMS substrates 

      Jumbert, Gil; Placidi, Marcel Jose; Alzina, F.; Sotomayor Torres, Clivia M.; Sledzinska, Marianna (Royal Society of Chemistry (RSC), 2021-06-09)
      Article
      Open Access
      Precise patterning of 2D materials into micro- and nanostructures presents a considerable challenge and many efforts are dedicated to the development of processes alternative to the standard lithography. In this work we ...
    • Feasibility of a full chalcopyrite tandem solar cell: a quantitative numerical approach 

      Tiwari, Kunal Jogendra; 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 ...
    • Gradient doping in Cu2ZnSnSe4 by temperature and potential induced defect steering 

      Jiménez Arguijo, Alex; Caño Prades, Ivan; Atlan, Fabien; Gong, Yuancai; Tiwari, Kunal Jogendra; Placidi, Marcel Jose; Puigdollers i González, Joaquim; Jehl Li-Kao, Zacharie; Saucedo Silva, Edgardo Ademar; Giraldo Muñoz, Sergio (Elsevier, 2023-09-15)
      Article
      Open Access
      Kesterite materials are among the most promising emerging photovoltaic absorbers, despite the number of challenging issues this technology presents. The use of soft thermal post-deposition treatments is key to improving ...
    • Impact of atomic layer deposition temperature on electrical and optical properties of ZnO:Al films 

      Masmitjà Rusiñol, Gerard; Estarlich Gil, Pau; López Rodríguez, Gema; Martín García, Isidro; Voz Sánchez, Cristóbal; Placidi, Marcel Jose; Torrens Dinarès, Arnau; Saucedo Silva, Edgardo Ademar; Vasquez, Pia; Muñoz, Delfina; Puigdollers i González, Joaquim; Ortega Villasclaras, Pablo Rafael (Elsevier, 2024-03-01)
      Article
      Open Access
      This work highlights the impact of growth temperature on electrical and optical properties of Al-doped ZnO (AZO) films deposited by atomic layer deposition (ALD) technique. The ALD process and super-cycle sequence have ...
    • Kinetics and phase analysis of kesterite compounds: Influence of chalcogen availability in the reaction pathway 

      Hernández Martínez, Alejandro; Giraldo, Sergio; Alcobe, Xavier; Becerril Romero, Ignacio; Placidi, Marcel Jose; Izquierdo Roca, Víctor; Pistor, Paul; Perez Rodriguez, Alejandro; Saucedo Silva, Edgardo Ademar; Valdés, Matías (2022-08-01)
      Article
      Restricted access - publisher's policy
      Physical vapor deposition methodologies have gained a lot of interest in the synthesis of kesterites, including sequential processes based on sputtering of metals followed by reactive annealing. Bearing this in mind, ...
    • Large efficiency improvement in Cu2ZnSnSe4 solar cells by introducing a superficial Ge nanolayer 

      Giraldo Muñoz, Sergio; Xie, Hong-Bing; Colina Brito, Mónica Alejandra; Placidi, Marcel Jose; Pistor, Paul; Saucedo Silva, Edgardo Ademar (2015-11)
      Article
      Open Access
    • Life cycle assessment of different chalcogenide thin-film solar cells 

      Resalati, Shahaboddin; Okoroafor, Tobechi; Maalouf, Amani; Saucedo Silva, Edgardo Ademar; Placidi, Marcel Jose (2022-05-01)
      Article
      Open Access
      Thin-film photovoltaics (PV) cells offer several benefits over conventional first-generation PV technologies, including lighter weight, flexibility, and lower power generation cost. Among the competing thin-film technologies, ...
    • Novel synthesis of semiconductor chalcohalide anti-perovskites by low-temperature molecular precursor ink deposition methodologies 

      Caño Prades, Ivan; Benítez Colominas, Pol; Asensi López, José Miguel; Payno, David; Puigdollers i González, Joaquim; Placidi, Marcel Jose; Cazorla Silva, Claudio; Agrawal, Rakesh; Saucedo Silva, Edgardo Ademar (Royal Society of Chemistry (RSC), 2024)
      Article
      Open Access
      In recent years, a growing interest in the development of new energy harvesting technologies based on earth-abundant, environmentally-friendly semiconductors, has led to the re-discovery of hitherto overlooked materials. ...
    • Numerical investigation of interface passivation strategies for Sb2Se3/CdS solar cells 

      Gon Medaille, Axel; Tiwari, Kunal Jogendra; Giraldo, Sergio; Placidi, Marcel Jose; Saucedo Silva, Edgardo Ademar; Jehl Li-Kao, Zacharie (Wiley, 2021-11-24)
      Article
      Open Access
      Sb2Se3 is an emerging earth-abundant material praised for its promising optoelectronic properties, although the presence of interfacial defects at the vicinity of the p–n junction limit its performance as photovoltaic ...
    • Optical and electrical properties of in-doped Cu2ZnSnSe4 

      Giraldo Muñoz, Sergio; Placidi, Marcel Jose; Escoubas, Ludovic; Saucedo Silva, Edgardo Ademar (2016-07)
      Article
      Open Access
      Cu2ZnSnSe4 (CZTSe) is a very promising material as absorber layer for low cost and earth abundant thin film solar cells. Currently in this technology we can find indium in different layers, including the transparent window ...