Strategies to Improve the Mechanical Robustness of Metal Halide Perovskite Solar Cells

Muzhi Li, Samuel Johnson, Lidon Gil-Escrig, Maayan Sohmer, Carlos Figueroa Morales, Hongki Kim, Siraj Sidhik, Aditya Mohite, Xiwen Gong, Lioz Etgar, Henk Bolink, Axel Palmstrom, Michael McGehee, Nicholas Rolston

Research output: Contribution to journalArticlepeer-review


We report on the mechanical properties of high-efficiency perovskite solar cells (PSCs) with different chemical components by measuring the fracture energy (Gc) of films and devices. With the help of both macroscopic and microscopic techniques, we identify the locations where fracture takes place in the devices (either adhesive or cohesive failure) with various material and device structures. We propose strategies that can improve the fracture energy of PSCs based on the measured Gc: the use of ozone-nucleated atomic layer deposition to improve charge transport layer robustness and the use of 2D perovskites and morphology control to improve the perovskite robustness. Our findings offer a pathway to rationally study the mechanical properties of PSCs and enable such cells to be more mechanically robust to reach commercial viability.
Original languageAmerican English
Pages (from-to)273-280
Number of pages8
JournalEnergy Advances
Issue number1
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5K00-88479


  • atomic layer deposition
  • fracture energy
  • metal halide perovskite


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