Spin-coated kesterite CZTS thin films for photovoltaic applications

L. Majula, N. R. Mlyuka, M. E. Samiji, Bryce Sydney Richards, D. Y. Kim, S. H. Kim, H. J. Lee, H. J. Choi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 10<sup>4</sup> cm<sup>−1</sup>), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N<inf>2</inf> atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.

Original languageEnglish
Pages (from-to)1078-1081
Number of pages4
JournalJournal of the Korean Physical Society
Volume67
Issue number6
DOIs
Publication statusPublished - Sep 2015

Keywords

  • Copper zinc tin-sulfide (CZTS)
  • Photovoltaics
  • Rapid thermal processing
  • Spin coating
  • Thin film

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Majula, L., Mlyuka, N. R., Samiji, M. E., Richards, B. S., Kim, D. Y., Kim, S. H., Lee, H. J., & Choi, H. J. (2015). Spin-coated kesterite CZTS thin films for photovoltaic applications. Journal of the Korean Physical Society, 67(6), 1078-1081. https://doi.org/10.3938/jkps.67.1078