Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Effect of Moisture on Cu(In,Ga)Se2 Solar Cell with (Ga,Al) Co-doped ZnO as Window Layer

(Ga,Al)이 도핑된 ZnO를 투명전극으로 가진 Cu(In,Ga)Se2 태양전지에 수분이 미치는 영향

  • Yang, So Hyun (School of Chemical engineering, Yeungnam University) ;
  • Bae, Jin A (School of Chemical engineering, Yeungnam University) ;
  • Song, Yu Jin (School of Chemical engineering, Yeungnam University) ;
  • Jeon, Chan Wook (School of Chemical engineering, Yeungnam University)
  • 양소현 (화학공학과, 영남대학교) ;
  • 배진아 (화학공학과, 영남대학교) ;
  • 송유진 (화학공학과, 영남대학교) ;
  • 전찬욱 (화학공학과, 영남대학교)
  • Received : 2017.11.16
  • Accepted : 2017.12.08
  • Published : 2017.12.31
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Abstract

We fabricated two different transparent conducting oxide thin films of ZnO doped with Ga ($Ga_2O_3$ 0.9 wt%) as well as Al ($Al_2O_3$ 2.1 wt%) (GAZO) and ZnO doped only with Al ($Al_2O_3$ 3 wt%) (AZO). It was investigated how it affects the moisture resistance of the transparent electrode. In addition, $Cu(In,Ga)Se_2$ thin film solar cells with two transparent oxides as front electrodes were fabricated, and the correlation between humidity resistance of transparent electrodes and device performance of solar cells was examined. When both transparent electrodes were exposed to high temperature distilled water, they showed a rapid increase in sheet resistance and a decrease in the fill factor of the solar cell. However, AZO showed a drastic decrease in efficiency at the beginning of exposure, while GAZO showed that the deterioration of efficiency occurred over a long period of time and that the long term moisture resistance of GAZO was better.

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References

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