Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.


Ever thinner high-efficiency cells

Ultrathin III–V solar cells are sought after for their relatively low cost and potential novel applications such as hot-carrier solar cells, but currently suffer from low power-conversion efficiency. Now, light-trapping nanostructures have been demonstrated to enable efficiency of 19.9% in a 205-nm-thick GaAs solar cell.

This is a preview of subscription content

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Fig. 1: Ultrathin GaAs solar cell and associated radiation tolerance properties.


  1. 1.

    Best Research-Cell Efficiency Chart National Renewable Energy Laboratory (2019).

  2. 2.

    Chen, H. L. et al. Nat. Energy (2019).

  3. 3.

    Miller, O. D., Yablonovitch, E. & Kurtz, S. R. IEEE J. Photovolt. 2, 303–311 (2012).

    Article  Google Scholar 

  4. 4.

    Ross, R. T. & Nozik, A. J. J. Appl. Phys. 53, 3813–3818 (1982).

    Article  Google Scholar 

  5. 5.

    Nguyen, D.-T. et al. Nat. Energy 3, 236–242 (2018).

    Article  Google Scholar 

  6. 6.

    Hirst, L. C. et al. Appl. Phys. Lett. 109, 033908 (2016).

    Article  Google Scholar 

  7. 7.

    Messenger, S. R., Summers, G. P., Burke, E. A., Walters, R. J. & Xapsos, M. A. Prog. Photovolt. 9, 103–121 (2001).

    Article  Google Scholar 

  8. 8.

    Messenger, S. R., Jackson, E. M., Warner, J. H. & Walters, R. J. In Proc. IEEE 35th Photovoltaic Specialists Conference 001106–001111 (IEEE, 2010).

Download references

Author information



Corresponding author

Correspondence to Louise Hirst.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Hirst, L. Ever thinner high-efficiency cells. Nat Energy 4, 726–727 (2019).

Download citation


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing