Cu2ZnSnS4 solar cells with a single spin-coated absorber layer prepared via a simple sol-gel route

Na Kyoung Youn, Ganesh L. Agawane, Dahyun Nam, Jihye Gwak, Seung Wook Shin, Jin Hyeok Kim, Jae Ho Yun, Sejin Ahn, Ara Cho, Young Ju Eo, Seung Kyu Ahn, Hyeonsik Cheong, Donghwan Kim, Kee Shik Shin, Kyung Hoon Yoon

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15 Citations (Scopus)

Abstract

Summary: Carbon-free Cu2ZnSnS4 (CZTS) thin films were prepared via a simple spin-coating process based on a sol-gel precursor of methoxyethanol solution with metal salts and thiourea, followed by post-sulfurization. The sol-gel precursor solution was deposited onto molybdenum-coated glass substrates. The sulfurization process was carried out using a conventional furnace at 525°C for 60min in a nitrogen atmosphere with sulfur powder. The structural, morphological and compositional properties of as-sulfurized thin films were characterized using X-ray diffraction, Raman spectroscopy, scanning electron microscopy and Auger electron spectroscopy. Only a single coating of the precursor solution was applied to obtain uniform Zn-rich and Cu-poor CZTS films thicker than 1μm after post-annealing. The best solar cell fabricated with the as-prepared CZTS films of band gap energy ~1.37eV showed a short-circuit current density of 10.15mA/cm2, an open circuit voltage of 0.509V, a fill factor of 33.72% and a conversion efficiency of 1.74%.

Original languageEnglish
JournalInternational Journal of Energy Research
DOIs
Publication statusAccepted/In press - 2015

Keywords

  • 2-methoxyethanol
  • CuZnSnS
  • Single-coating
  • Sol-gel process
  • Thin film solar cell

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering
  • Renewable Energy, Sustainability and the Environment

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    Youn, N. K., Agawane, G. L., Nam, D., Gwak, J., Shin, S. W., Kim, J. H., Yun, J. H., Ahn, S., Cho, A., Eo, Y. J., Ahn, S. K., Cheong, H., Kim, D., Shin, K. S., & Yoon, K. H. (Accepted/In press). Cu2ZnSnS4 solar cells with a single spin-coated absorber layer prepared via a simple sol-gel route. International Journal of Energy Research. https://doi.org/10.1002/er.3446