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Atomically thin two-dimensional organic-inorganic hybrid perovskites.
- Author(s): Dou, Letian;
- Wong, Andrew B;
- Yu, Yi;
- Lai, Minliang;
- Kornienko, Nikolay;
- Eaton, Samuel W;
- Fu, Anthony;
- Bischak, Connor G;
- Ma, Jie;
- Ding, Tina;
- Ginsberg, Naomi S;
- Wang, Lin-Wang;
- Alivisatos, A Paul;
- Yang, Peidong
- et al.
Published Web Location
https://doi.org/10.1126/science.aac7660Abstract
Organic-inorganic hybrid perovskites, which have proved to be promising semiconductor materials for photovoltaic applications, have been made into atomically thin two-dimensional (2D) sheets. We report the solution-phase growth of single- and few-unit-cell-thick single-crystalline 2D hybrid perovskites of (C4H9NH3)2PbBr4 with well-defined square shape and large size. In contrast to other 2D materials, the hybrid perovskite sheets exhibit an unusual structural relaxation, and this structural change leads to a band gap shift as compared to the bulk crystal. The high-quality 2D crystals exhibit efficient photoluminescence, and color tuning could be achieved by changing sheet thickness as well as composition via the synthesis of related materials.
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