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Nano Research

Article Title

Confined-solution process for high-quality CH3NH3PbBr3 single crystals with controllable morphologies

Authors

Yitan Li, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
Lu Han, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Qiao Liu, College of Engineering, Peking University, Beijing 100871, China
Wei Wang, State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China
Yuguang Chen, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Min Lyu, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Xuemei Li, Electron Microscopy Laboratory, Peking University, Beijing 100871, China
Hao Sun, Bruker (Beijing) Scientific Technology Co., Ltd., Beijing 100081, China
Hao Wang, College of Engineering, Peking University, Beijing 100871, China
Shufeng Wang, State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China
Yan Li, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China

Keywords

confined solution process, single crystal, perovskite, atomic-scale flatness

Abstract

ABSTRACT Solution processes have shown excellent potential for application to the growth of single-crystal materials. We have developed a confined-solution method for the preparation of single crystals with a controlled morphology. By confining the precursor solution within a micrometer-thick cavity and then controlling the saturation by adjusting the temperature gradient and fluid flow, high-quality CH3NH3PbBr3 single crystals with tunable morphologies could be obtained. The morphologies of the CH3NH3PbBr3 can be adjusted from sub-square centimeter-scale thin sheets that are square or rectangular, to one-dimensional wires with lengths in the order of centimeters, simply by changing the temperature. The thicknesses of the CH3NH3PbBr3 sheets could be adjusted from hundreds of nanometers to tens of microns. The CH3NH3PbBr3 sheets feature very clean surfaces with an atomic-scale roughness. This simple strategy provides a means of growing high-quality single crystals with clean surfaces, which realize high levels of performance when applied to devices.

Graphical Abstract

Publisher

Tsinghua University Press

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