Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Characterization of the Cu-layer deposition time on Cu2ZnSnS4 (CZTS) Thin Film Solar Cells Fabricated by Electro-deposition

Cu층 증착시간에 따른 Cu2ZnSnS4 (CZTS) 박막의 특성

  • Kim, Yoon Jin (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Kim, In Young (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Gang, Myeng Gil (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Moon, Jong Ha (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Kim, Jin Hyeok (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
  • 김윤진 (신소재공학부, 전남대학교) ;
  • 김인영 (신소재공학부, 전남대학교) ;
  • 강명길 (신소재공학부, 전남대학교) ;
  • 문종하 (신소재공학부, 전남대학교) ;
  • 김진혁 (신소재공학부, 전남대학교)
  • Received : 2015.12.23
  • Accepted : 2016.01.04
  • Published : 2016.03.31
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Abstract

$Cu_2ZnSnS_4$ (CZTS) thin films were fabricated by successive electrodeposition of layers of precursor elements followed by sulfurization of an electrodeposited Cu-Zn-Sn precursor. In order to improve quality of the CZTS films, we tried to optimize the deposition condition of absorber layers. In particular, I have conducted optimization experiments by changing the Cu-layer deposition time. The CZTS absorber layers were synthesized by different Cu-layer conditions ranging from 10 to 16 minutes. The sulfurization of Cu/Sn/Zn stacked metallic precursor thin films has been conducted in a graphite box using rapid thermal annealing (RTA). The structural, morphological, compositional, and optical properties of CZTS thin films were investigated using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, and X-ray Flourescenece Spectrometry (XRF). Especially, the CZTS TFSCs exhibits the best power conversion efficiency of 4.62% with $V_{oc}$ of 570 mV, $J_{sc}$ of $18.15mA/cm^2$ and FF of 45%. As the time of deposition of the Cu-layer to increasing, the properties were confirmed to be systematically changed. And we have been discussed in detail below.

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References

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