Effect of sodium-doping on the performance of CZTS absorb layer: Single and bifacial sodium-incorporation method

Jiangtao Xu, Songmin Shang, Jing Yang, Jing Liu, Shouxiang Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In current work, sodium doped CZTS films are deposited onto Mo-coated stainless-steel foil for fabrication of flexible solar cells. New strategies for sodium incorporation of Cu2ZnSnS4 (CZTS) thin films are introduced and investigated. In detail, bilayer NaF film was deposited at the bottom and on the top of CZTS films to obtain a uniformly doped CZTS film. For comparison, CZTS films were also doped with a single layer NaF from bottom and top, respectively. Secondary ion mass spectroscopy (SIMS) is applied to investigate the distribution of different elements along the depth, X-ray diffraction and Raman spectroscopy are used to identify the crystallinity and secondary phases. Finally, solar cells are assembled based on the prepared CZTS films with an efficiency of 2.3%. Although the obtained devices show a far lower efficiency compared with other reports, current research provides a feasible path for sodium incorporation when fabricating CZTS films on Na-free substrates.

Original languageEnglish
Pages (from-to)476-482
Number of pages7
JournalSolar Energy
Volume221
DOIs
Publication statusPublished - Jun 2021

Keywords

  • Bilayer NaF
  • CZTS
  • Sodium incorporation
  • Stainless steel

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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