Applied Science and Convergence Technology

The Korean Vacuum Society (한국진공학회)
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Photovoltaic Characteristics of Low-density Concentration GaAs Solar Cells with/without Anti-reflective Coating

  • Noh, Sam Kyu (Nano Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Kim, Jong Soo (Department of Physics, Yeungnam University) ;
  • Kim, Jin Soo (Divsion of Advanced Materials Engineering, Chonbuk National University) ;
  • Yu, Jae Su (Department of Electronics and Radio Engineering, Kyung Hee University)
  • Received : 2014.01.08
  • Accepted : 2014.01.21
  • Published : 2014.01.30
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Abstract

We have studied photovoltaic characteristics of single-junction GaAs solar cells with/without an $MgF_2/ZnS$ anti-reflective coating (ARC) illuminated by low-density concentration (<10 suns). By the ARC deposition, the short-circuit current density ($J_{SC}$) and the fill factor (FF) are increased by $5mA/cm^2$ and 5% at a standard illumination (1 sun), respectively, and the resulted conversion efficiency is enhanced by 45%. In contrast with the cell with no ARC showing a rapid degradation with increasing concentration power, the efficiency of ARC-deposited cell remains almost constant as ($17.7{\pm}0.3$)% regardless of the concentration. It informs that ARC treatment is very effective in GaAs concentrator solar cells.

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