Get access

Single-Step Sulfo-Selenization Method to Synthesize Cu2ZnSn(SySe1−y)4 Absorbers from Metallic Stack Precursors

Authors

  • Andrew Fairbrother,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Xavier Fontané,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Dr. Victor Izquierdo-Roca,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Moises Espindola-Rodriguez,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Simon López-Marino,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Dr. Marcel Placidi,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Dr. Juan López-García,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    Search for more papers by this author
  • Prof. Alejandro Pérez-Rodríguez,

    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    2. IN2UB, Departament d'Electrònica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona (Spain)
    Search for more papers by this author
  • Dr. Edgardo Saucedo

    Corresponding author
    1. Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)
    • Advanced Materials for Energy, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, 2pl, 08930 Sant Adrià del Besòs, Barcelona (Spain)

    Search for more papers by this author

Abstract

Pentenary Cu2ZnSn(SySe1−y)4 (kesterite) photovoltaic absorbers are synthesized by a one-step annealing process from copper-poor and zinc-rich precursor metallic stacks prepared by direct-current magnetron sputtering deposition. Depending on the chalcogen source—mixtures of sulfur and selenium powders, or selenium disulfide—as well as the annealing temperature and pressure, this simple methodology permits the tuning of the absorber composition from sulfur-rich to selenium-rich in one single annealing process. The impact of the thermal treatment variables on chalcogenide incorporation is investigated. The effect of the S/(S+Se) compositional ratio on the structural and morphological properties of the as-grown films, and the optoelectronic parameters of solar cells fabricated using these absorber films is studied. Using this single-step sulfo-selenization method, pentenary kesterite-based devices with conversion efficiencies up to 4.4 % are obtained.

Ancillary