The effect of sulphur amount in sulphurization stage on secondary phases in Cu2SnS3(CTS) films

Sozak I. M. S., Yorulmaz U., Atay F., Akyüz İ.

CURRENT APPLIED PHYSICS, cilt.26, ss.64-71, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.cap.2021.03.009
  • Dergi Adı: CURRENT APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.64-71
  • Anahtar Kelimeler: Cu2SnS3, Thermal evaporation, Sulphurization, Solar cell, Secondary phase, THIN-FILM, SOLAR-CELL, OPTICAL-PROPERTIES, CTS, TEMPERATURE, FABRICATION, DEPOSITION, LAYER
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Cu2SnS3 is a promising absorber for green thin film solar cells because of its suitable optoelectrical properties and environment friendly components. In this study, CTS films were prepared by sulphurization of stacked metallic precursors deposited by thermal evaporation. Some physical properties were investigated by changing the amount of sulphur used in sulphurization stage. Highly crystalline tetragonal-CTS phase was obtained for all samples. However, Cu3SnS4 and CuS secondary phases were also determined at low amounts. Cu/Sn ratio approached to desired stoichiometry of CTS with increasing sulphur amount. Absorption spectra showed that there are two discrete absorption regions that are related to tetragonal-CTS and secondary phases. Thickness and optical constants were determined using spectroscopic ellipsometry. Atomic force microscope was used to evaluate the effects of sulphur amount on the morphology of CTS films. As a result, this study suggests a way of minimizing the secondary phases to obtain single phase tetragonal CTS.