Strategies toward Suppression of Sn(II) Oxidation for Stable Sn-Pb Perovskite Solar Cells

Ansuman Halder, Kyu Woong Yeom, Nam Gyu Park

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations


For the increasing demand for renewable energy to reduce carbon dioxide emissions, a high-efficiency, low-cost perovskite solar cell (PSC) is one of the most promising technologies. To further improve the power conversion efficiency, a tandem device comprising a bottom cell with low band gap perovskite is a potential candidate. Tin-lead alloyed perovskite is suitable for this purpose due to its low band gap of about ∼1.2-1.3 eV. However, the stability of Sn(II) in the alloyed perovskite films poses a significant challenge to the progress of the technology. Here, we identify the origin of tin instability in tin-lead perovskite and analyze the promising stability improvement strategies available in the literature. In addition, we offer a perspective for further development of strategies to enhance the stability of the material and the device’s performance.

Original languageEnglish
Pages (from-to)4267-4277
Number of pages11
JournalACS Energy Letters
Issue number10
StatePublished - 13 Oct 2023
Externally publishedYes

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© 2023 American Chemical Society.


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