Water-Induced Dimensionality Reduction in Metal-Halide Perovskites

Bekir Turedi, Kwangjae Lee, Ibrahim Dursun, Badriah Jaber Alamer, Zhennan Wu, Erkki Alarousu, Omar F. Mohammed, Namchul Cho, Osman Bakr

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Metal-halide perovskite materials are highly attractive materials for optoelectronic applications. However, the instability of perovskite materials caused by moisture and heat-induced degradation impairs future prospects of using these materials. Here we employ water to directly transform films of the three-dimensional (3D) perovskite CsPbBr3 to stable two-dimensional (2D) perovskite-related CsPb2Br5. A sequential dissolution-recrystallization process governs this water induced transformation under PbBr2 rich condition. We find that these post-synthesized 2D perovskite-related material films exhibit excellent stability against humidity and high photoluminescence quantum yield. We believe that our results provide a new synthetic method to generate stable 2D perovskite-related materials that could be applicable for light emitting device applications.
Original languageEnglish (US)
Pages (from-to)14128-14134
Number of pages7
JournalThe Journal of Physical Chemistry C
Issue number25
StatePublished - Mar 30 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors wish to thank to Abdullah S. Abbas for the help in the video editing. The authors acknowledge the funding support from King Abdullah University of Science and Technology (KAUST). This work was also supported by the Soonchunhyang University Research Fund.


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