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

31 Scopus citations

Abstract

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
Volume122
Issue number25
DOIs
StatePublished - Mar 30 2018

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