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Further absorption enhancement in ultra-thin solar cells structured with multiple-level grating

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Abstract

Light trapping methods could increase effective optical path length of light and hence the probability of its absorption inside the solar cell which is vital for thin film even ultra-thin film solar cells design. However, the patterned solar cells are always faced with the increase of recombination, especially the surface recombination. In other words, surface recombination plays a key role in high efficiency nanostructured thin film solar cells. How to reduce the recombination in a nanostructured cell or further increase absorption without increase of surface recombination is meaningful in solar cell design. We further increases light absorption without increase of surface recombination, and the extra light absorption contribute to the device efficiency. Several main kinds of multiple-level grating are investigated in our work. This concept of multiple-level grating shows significant importance in effective nanostructure light trapping.

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Acknowledgments

This work was supported by Startup Fund by Peking University Shenzhen Graduate School. The authors would like to acknowledge the valuable discussions with Feifei Shi, Fangwang Gou, Ji Chen and Fengyun Zhao in the same group.

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Authors and Affiliations

  1. School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, China

    Chuanhong Liu, Junfeng Qiao & Zhaoyu Zhang

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  1. Chuanhong Liu
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  2. Junfeng Qiao
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  3. Zhaoyu Zhang
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Correspondence to Zhaoyu Zhang.

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Liu, C., Qiao, J. & Zhang, Z. Further absorption enhancement in ultra-thin solar cells structured with multiple-level grating. Opt Quant Electron 47, 1519–1526 (2015). https://doi.org/10.1007/s11082-015-0153-y

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  • DOI: https://doi.org/10.1007/s11082-015-0153-y

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