Photonic Crystals: Enhanced Photon Management of Thin-Film Silicon Solar Cells Using Inverse Opal Photonic Crystals with 3D Photonic Bandgaps (Advanced Optical Materials 10/2013)

Authors

  • Leo T. Varghese,

    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
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  • Yi Xuan,

    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
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  • Ben Niu,

    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
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  • Li Fan,

    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
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  • Peter Bermel,

    Corresponding author
    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
    • Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana 47907 USA

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  • Minghao Qi

    Corresponding author
    1. Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana, USA
    • Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, Indiana 47907 USA

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Abstract

image

To enhance light trapping, M. Qi, P. Bermel, and co-workers use 3D photonic crystals (PhCs) as back-reflectors for solar cells. On page 692, a novel S5 process is developed to form a freestanding, self-assembled, inverse opal PhC, which is then transferred onto a commercial thinfilm silicon solar cell. As illustrated in the image, light impinging onto the PhC not only reflects but also diffracts back into the solar cell, resulting in increased electron–hole pair generation and a material efficiency enhancement of 10%.

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