High-efficiency quantum structure tandem solar cells

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  • SUGIYAMA Masakazu
    School of Engineering, the University of Tokyo
  • WATANABE Kentaroh
    Research Center for Advanced Science and Technology, the University of Tokyo
  • HIGO Akio
    Research Center for Advanced Science and Technology, the University of Tokyo
  • NAKANO Yoshiaki
    Research Center for Advanced Science and Technology, the University of Tokyo

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Other Title
  • 高効率量子タンデム太陽電池
  • コウコウリツ リョウシ タンデム タイヨウ デンチ

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Abstract

<p>Tandem solar cells with III-V compound semiconductors, which have achieved a conversion efficiency above 40%, are a key technology for large-scale solar power generation plants. Further improvement in conversion efficiency requires lattice-matched materials with a combination of bandgaps that satisfies current matching among serially connected cells. We focus on strain-balanced InGaAs/GaAsP quantum wells that have an effective bandgap in the range 1.0-1.2 eV, which can be lattice matched to either GaAs or Ge. Metal-organic vapor phase epitaxy (MOVPE) with in situ strain monitoring allowed precise strain balancing of this structure, which will lead to higher conversion efficiencies in tandem solar cells with quantum wells.</p>

Journal

  • Oyo Buturi

    Oyo Buturi 79 (5), 435-439, 2010-05-10

    The Japan Society of Applied Physics

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