Optimization of sputtered ZnS buffer for Cu2ZnSnS4 thin film solar cells

Jongmin Kim, C. Park, S. M. Pawar, Akbar I. Inamdar, Yongcheol Jo, J. Han, Jinpyo Hong, Young S. Park, D. Y. Kim, W. Jung, Hyungsang Kim, Hyunsik Im

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

Cu2ZnSnS4 (CZTS) thin film solar cells with sputtered zinc sulfide (ZnS) buffer layers are fabricated. The effect of ZnS (buffer layer) film thicknesses along with a CZTS absorber layer prepared by sputtered metallic precursor film followed by sulfurization on the solar cell properties is investigated. The impact of the sputtering power on the structural, morphological, compositional and optical properties of the ZnS buffer layers is studied. The optimized ZnS buffer layer with a thickness of ~ 30 nm in CZTS based solar cell structure exhibits the best solar cell conversion efficiency of 2.11% with open-circuit voltage of 311 mV, short-circuit current density of 12.16 mA/cm2 and fill factor of 0.55.

Original languageEnglish
Pages (from-to)88-92
Number of pages5
JournalThin Solid Films
Volume566
DOIs
StatePublished - 1 Sep 2014

Keywords

  • Buffer layer
  • Copper zinc tin sulfide
  • Sputtering
  • Thin film solar cells
  • Zinc sulfide

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