Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Synthesis of CuSbS2 and CuSbSe2 Nanocrystals by a Mechanochemical Method

기계화학적 방법에 의한 CuSbS2와 CuSbSe2 나노입자의 합성

  • Park, Bo-In (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Seung Yong (Center for Materials Architecturing, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Doh-Kwon (Department of Nanomaterials Science and Engineering, Korea University of Science and Technology (UST))
  • 박보인 (한국과학기술연구원, 물질구조제어연구센터) ;
  • 이승용 (한국과학기술연구원, 물질구조제어연구센터) ;
  • 이도권 (과학기술연합대학원대학교, 나노재료공학과)
  • Received : 2017.09.08
  • Accepted : 2017.12.16
  • Published : 2017.12.31
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Abstract

$CuSbS_2$ (CAS) and $CuSbSe_2$ (CASe) nanocrystals (NCs), which consist of earth-abundant elements, were synthesized by a mechanochemical method. Elemental precursors such as copper, antimony, sulfur, and selenium were used without adding any organic solvents or additives. The NCs were synthesized by milling for a few hours. The sudden phase changes occurred by self-ignition and propagation, as previously observed in other mechanochemical synthetic processes. The XRD, Raman, and TEM analysis were carried out to determine the crystallinity and secondary phase of the as-synthesized CAS and CASe NCs, confirming the phase-pure synthesis of CAS and CASe. Optical properties were investigated by UV-Vis spectroscopy and it was observed that the band gap energies were about 1.1 and 1.5 eV, respectively for CAS and CASe, suggesting the potential for the use as solar cell materials. The NC colloids dispersed in anhydrous ethanol were prepared and coated on Mo substrates by a facile doctor-blade method. The investigation on the solar cell properties of the as-synthesized materials is underway.

Keywords

References

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