Water-Assisted Lift-Off Process for Flexible CdTe Solar Cells

Sandip Bista, Deng-Bing Li, Suman Rijal, Sabin Neupane, Rasha Awni, Chun-Sheng Jiang, Chuanxiao Xiao, Kamala Subedi, Zhaoning Song, Adam Phillips, Xixing Wen, Randall Ellingson, Michael Heben, Yanfa Yan

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations


In recent years, various lift-off methods have been developed to fabricate lightweight and flexible cadmium telluride (CdTe)-based solar cells. In this work, we report flexible cadmium sulfide (CdS)/CdTe solar cells using a water-assisted lift-off approach. We demonstrate that an additional cadmium chloride treatment for the CdS film is critical to improve the grain size of CdS and the post-deposited CdTe film and the electron conductivity of the CdS film. As a result, the quality of the CdS/CdTe front junction is significantly improved with reduced nonradiative recombination. Finally, our lightweight and flexible polycrystalline CdTe solar cells demonstrate a champion power conversion efficiency of 12.6%.

Original languageAmerican English
Pages (from-to)885-891
Number of pages7
JournalACS Applied Energy Materials
Issue number2
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-85273


  • cadmium chloride
  • cadmium telluride
  • delamination
  • flexible
  • lightweight


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