Slow Spontaneous Efficiency Enhancement of Single-Crystal Perovskite Solar Cells Due to Trapped Solvent

Vishal Yeddu, Parinaz Moazzezi, Bekir Turedi, Muhammad Naufal Lintangpradipto, Dongyang Zhang, Soumya Kundu, Deepak Thrithamarassery Gangadharan, Reuven Gordon, Osman M. Bakr, Makhsud I. Saidaminov*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Perovskite solar cells show spontaneous efficiency enhancement (SEE), i.e., their efficiency improves with time over a few days. Many mechanisms have been proposed for explaining such behavior in polycrystalline perovskite solar cells. However, such studies have not been performed on single-crystal perovskite solar cells. Here, we report our observation of slow (∼20 days) SEE in methylammonium lead iodide single-crystal perovskite solar cells. We found that the SEE is due to the slow escape of solvent trapped by the perovskite single-crystal thin films. We show that this process can be substantially accelerated by heat treatment of cells at 40 °C. This work provides a ground for fast-tracking the progress of single-crystal perovskite solar cells.

Original languageEnglish (US)
Pages (from-to)2257-2264
Number of pages8
JournalACS Applied Energy Materials
Issue number4
StatePublished - Feb 27 2023

Bibliographical note

Funding Information:
The authors thank Solaires Entreprises Inc. and the Canadian Natural Sciences and Engineering Research Council (NSERC) (ALLRP 566552–21). M.I.S. is thankful to the NSERC (RGPIN-2020-04239), the Canadian Foundation for Innovation (40326), B.C. Knowledge Development fund, and the Canada Research Chairs Program (CRC-2019-00297) for financial support. B.T., M.N.L, and O.M.B are thankful to KAUST for financial support. The authors would like to thank Dr. Tyler Trefz for helping with GC-MS measurements.

Publisher Copyright:
© 2023 American Chemical Society.


  • aging
  • enhancement
  • perovskite
  • single crystals
  • solar cells

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering


Dive into the research topics of 'Slow Spontaneous Efficiency Enhancement of Single-Crystal Perovskite Solar Cells Due to Trapped Solvent'. Together they form a unique fingerprint.

Cite this