Current Photovoltaic Research

  • 제10권2호
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  • Pages.39-48
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  • 2022
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  • 2288-3274(pISSN)
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  • 2508-125X(eISSN)
한국태양광발전학회 (Korea Photovoltaic Society)
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Effect of Pre-annealing on the Formation of Cu2ZnSn(S,Se)4 Thin Films from a Se-containing Cu/SnSe2/ZnSe2 Precursor

  • Ko, Young Min (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Sung Tae (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Ko, Jae Hyuck (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Ahn, Byung Tae (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Chalapathy, R.B.V. (Department of Physics, Vel Tech High Tech Dr Rangarajan Dr Sakunthla Engineering College)
  • 투고 : 2022.02.17
  • 심사 : 2022.03.24
  • 발행 : 2022.06.30
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초록

A Se-containing Cu/SnSe2/ZnSe precursor was employed to introduce S to the precursor to form Cu2ZnSn(S,Se)4 (CZTSSe) film. The morphology of CZTSSe films strongly varied with two different pre-annealing environments: S and N2. The CZTSSe film with S pre-annealing showed a dense morphology with a smooth surface, while that with N2 pre-annealing showed a porous film with a plate-shaped grains on the surface. CuS and Cu2Sn(S,Se)3 phases formed during the S pre-annealing stage, while SnSe and Cu2SnSe3 phases formed during the N2 pre-annealing stage. The SnSe phase formed during N2 pre-annealing generated SnS2 phase that had plate shape and severely aggravated the morphology of CZTSSe film. The power conversion efficiency of the CZTSSe solar cell with S pre-annealing was low (1.9%) due to existence of Zn(S.Se) layer between CZTSSe and Mo substrate. The results indicated that S pre-annealing of the precursor was a promising method to achieve a good morphology for large area application.

키워드

과제정보

This work was financially supported by the Technology development program to solve climate changes of the National Research Foundation, South Korea (No. 2016M1A2A2936757) and by the Korea Institute of Energy Technology Evaluation and Planning, South Korea (No. 20163030013690).

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