Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Characterization of Non-vacuum CuInSe2 Solar Cells Deposited on Bilayer Molybdenum

이중층 몰리브데늄을 후면전극으로 적용한 비진공법 CuInSe2 태양전지의 특성

  • Hwang, Ji Sub (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Yun, Hee-Sun (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Jang, Yoon Hee (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Jang mi (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Doh-Kwon (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST))
  • 황지섭 (광전하이브리드연구센터, 한국과학기술연구원) ;
  • 윤희선 (광전하이브리드연구센터, 한국과학기술연구원) ;
  • 장윤희 (광전하이브리드연구센터, 한국과학기술연구원) ;
  • 이장미 (광전하이브리드연구센터, 한국과학기술연구원) ;
  • 이도권 (광전하이브리드연구센터, 한국과학기술연구원)
  • Received : 2020.05.02
  • Accepted : 2020.05.27
  • Published : 2020.06.30
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Abstract

Molybdenum (Mo) thin films are widely used as back contact in copper indium diselenide (CISe) solar cells. However, despite this, there are only few published studies on the properties of Mo and characteristics of CISe solar cells formed on such Mo substrates. In this studies, we investigated the properties of sputter deposited Mo bilayer, and fabricated non-vacuum CISe solar cells using bilayer Mo substrates. The changes in surface morphology and electrical resistivity were traced by varying the gas pressure during deposition of the bottom Mo layer. In porous surface structure, it was confirmed that the electrical resistivity of Mo bilayer was increased as the amount of oxygen bonded to the Mo atoms increased. The resulting solar cell characteristics vary as the bottom Mo layer deposition pressure, and the maximum solar cell efficiency was achieved when the bottom layer was deposited at 7 mTorr with a thickness of 100 nm and the top layer deposited at 3 mTorr with a thickness of 400 nm.

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References

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