Skip to main content
Log in

CIGS Photovoltaics

Using both sides of the panel

  • News & Views
  • Published:

From Nature Energy

View current issue Submit your manuscript

Bifaciality allows the harvest of sunlight from both sides of a solar cell and thereby increases power output, but the efficiency of thin-film devices lags behind that of silicon counterparts. Now, researchers demonstrate a bifacial Cu(In,Ga)Se2-perovskite tandem solar cell with a 28 mW/cm2 power output under front and rear illumination.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1: Characterization of the bifacial CIGS bottom cell.

Adapted from ref. 5, Springer Nature Ltd.


  1. Nakamura, M. et al. En. Mater. 5, 8103–8111 (2022).

    Google Scholar 

  2. Jost, M. et al. ACS En. Lett. 7, 1298–1307 (2022).

    Article  Google Scholar 

  3. Al-Ashouri, A. et al. Science 370, 1300–1309 (2020).

    Article  Google Scholar 

  4. Four terminal perovskite-silicon PV tandem devices hit 30% efficiency. Solliance (2022).

  5. Yang, S.-C. et al. Nat. Energy (2022).

    Article  Google Scholar 

  6. Yang, S.-C. et al. Solar RRL 5, 2100108 (2021).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Marika Edoff.

Ethics declarations

Competing interests

The author declares no competing interests.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Edoff, M. Using both sides of the panel. Nat Energy 8, 15–16 (2023).

Download citation

  • Published:

  • Issue Date:

  • DOI:

  • Springer Nature Limited