Journal of Electronic Materials

, 40:2214

Grain Size and Texture of Cu2ZnSnS4 Thin Films Synthesized by Cosputtering Binary Sulfides and Annealing: Effects of Processing Conditions and Sodium

  • W.M. HLAING Oo
  • J.L. Johnson
  • A. Bhatia
  • E.A. Lund
  • M.M. Nowell
  • M.A. Scarpulla
Article

Abstract

We investigate the synthesis of kesterite Cu2ZnSnS4 (CZTS) polycrystalline thin films using cosputtering from binary sulfide targets followed by annealing in sulfur vapor at 500°C to 650°C. The films are the kesterite CZTS phase as indicated by x-ray diffraction, Raman scattering, and optical absorption measurements. The films exhibit (112) fiber texture and preferred low-angle and Σ3 grain boundary populations which have been demonstrated to reduce recombination in Cu(In,Ga)Se2 and CdTe films. The grain growth kinetics are investigated as functions of temperature and the addition of Na. Significantly, lateral grain sizes above 1 μm are demonstrated for samples grown on Na-free glass, demonstrating the feasibility for CZTS growth on substrates other than soda lime glass.

Keywords

Cu2ZnSnS4 copper zinc tin sulfide thin-film solar cell grain boundaries grain growth earth-abundant photovoltaic materials chalcopyrite sodium kesterite 

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Copyright information

© TMS 2011

Authors and Affiliations

  • W.M. HLAING Oo
    • 1
  • J.L. Johnson
    • 2
  • A. Bhatia
    • 1
  • E.A. Lund
    • 3
  • M.M. Nowell
    • 4
  • M.A. Scarpulla
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringUniversity of UtahSalt Lake CityUSA
  2. 2.Department of Electrical and Computer EngineeringUniversity of UtahSalt Lake CityUSA
  3. 3.Department of Chemical EngineeringUniversity of UtahSalt Lake CityUSA
  4. 4.EDAX-TSLDraperUSA

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