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Surface Structure Conversion Related CH_3NH_3PbI_3 Single Crystal Growth

Jianxu Ding  Ying Zhao  
【摘要】:Crystal growth fundamental covers the topics of nucleation of crystals in solutions,crystal morphology,surface phenomena and parameters of crystal growth,transport phenomena-heat and mass transfer,observation and simulation of crystallization behaviors etc.Here,we chose CH_3NH_3PbI_3 crystal and focused on the surface structure conversion related growth kinetics from GBL solutions via AFM.The surface structures were dependent on CH_3NH_3PbI_3 concentrations in GBL solution and growth time.At a given concentration,such as 1.5 M,there existed multilevel steps on(100) facets,consisted of steps whose height of about half of the unit cell,and bunched kinked steps.The elemental steps were prone to being bunched with odd number,and the height of the bunched steps could reach to tens of nanometers.By controlling the growth concentration and growth time,CH_3NH_3PbI_3 crystal with size of 15 mm was easily obtained.
【作者单位】:School of Materials Science and Engineering,Shandong University of Science and Technology
【分类号】:O78
【正文快照】:
Fig.1 Surface structures and the corresponding growth steps in CH3NH3Pb I3 crystalSurface Structure Conversion Related CH_3NH_3PbI_3 Single Crystal Growth@Jianxu Ding$School of Materials Science and Engineering,Shandong University of Science and Technolo

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