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2022 Vol.10, Issue 2 Preview Page
Effect of Pre-annealing on the Formation of Cu2ZnSn(S,Se)4 Thin Films from a Se-containing Cu/SnSe2/ZnSe2 Precursor
Young Min Ko12
,
Sung Tae Kim1
,
Jae Hyuck Ko1
,
Byung Tae Ahn1*
,
R. B. V. Chalapathy3*
1Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
2R&D Division, LG Energy Solution, Korea
3Department of Physics, Vel Tech High Tech Dr Rangarajan Dr Sakunthla Engineering College, Chennai 600 062, India
*Corresponding Author
30 June 2022. pp. 39-48
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Abstract

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.

Keywords
CZTSSe film
Cu/SnSe2/ZnSe precursor
sulfurization
S pre-annealing
dense morphology
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Information
  • Publisher :Korea Photovoltaic Society
  • Publisher(Ko) :한국태양광발전학회
  • Journal Title :Current Photovoltaic Research
  • Volume : 10
  • No :2
  • Pages :39-48
  • Received Date : 2022-02-17
  • Revised Date : 2022-03-18
  • Accepted Date : 2022-03-24
  • DOI :https://doi.org/10.21218/CPR.2022.10.2.039
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