Publication

Water-Induced Dimensionality Reduction in Metal-Halide Perovskites

Water-Induced Dimensionality Reduction in Metal-Halide Perovskites
Bekir Turedi, Kwangjae Lee, Ibrahim Dursun, Badriah Alamer, Zhennan Wu, Erkki Alarousu, Omar F. Mohammed, Namchul Cho, Osman M. Bakr
The Journal of Physical Chemistry C
Bekir Turedi, Kwangjae Lee, Ibrahim Dursun, Badriah Alamer, Zhennan Wu, Erkki Alarousu, Omar F. Mohammed, Namchul Cho, and Osman M. Bakr
optoelectronic, photoluminescence. synthetic method, 2D perovskite
2018
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. ​​
DOI: 10.1021/acs.jpcc.8b01343