Get access

Optimal design of ultra-broadband, omnidirectional, and polarization-insensitive amorphous silicon solar cells with a core-shell nanograting structure

Authors

  • L. Yang,

    1. Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China
    Search for more papers by this author
  • L. Mo,

    1. Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China
    2. Department of Physics, Zhejiang University, Hangzhou, People's Republic of China
    Search for more papers by this author
  • Y. Okuno,

    1. Department of Electrical and Computer Engineering, Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan
    Search for more papers by this author
  • S. He

    Corresponding author
    1. Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, People's Republic of China
    • Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology, Stockholm, Sweden
    Search for more papers by this author

Correspondence: Sailing He, Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology, S-100 44 Stockholm, Sweden.

E-mail: sailing@kth.se

ABSTRACT

We systematically investigated the optical behaviors of an amorphous silicon solar cell with a core-shell nanograting structure. The horizontally propagating Bloch waves and Surface Plasmon Polariton waves lead to significant absorption enhancements and consequently short-circuit current enhancements of this structure, compared with the conventional planar one. The perpendicular carrier collection makes this structure optically thick and electronically thin. An optimal design is achieved through full-field numerical simulation, and a physical explanation is given. Our numerical results show that this configuration has ultra-broadband, omnidirectional, and polarization-insensitive responses and has a great potential in photovoltaics. Copyright © 2012 John Wiley & Sons, Ltd.

Ancillary