Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 122, Issue 25, Pages 14128-14134Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.8b01343
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Funding
- King Abdullah University of Science and Technology (KAUST)
- Soonchunhyang University Research Fund
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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 conditions. We find that these postsynthesized 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.
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