Ultra-thin CsBr overlayers on the Ag (111) surface have been grown using physical vapor deposition and studied by scanning tunneling microscopy. Atomically resolved images of CsBr show the formation of the NaCl crystal structure rather than the bulk structure of CsBr, i.e., CsCl, in the first two atomic layers. The structure remains the same up to five monolayers, the maximum layer thickness being studied. Mobility of CsBr islands up to 1.1 nm thickness has been observed at room temperature. CsBr is one of the binary constituents for the growth of CsPbBr₃ perovskites. Exploring the growth of CsBr on Ag (111) will provide reference information for the better understanding of the growth of CsPbBr₃ perovskite thin films under similar growth conditions.

中文翻译：

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Ag（111）上CsBr薄膜的原子结构

Ag（111）表面上的超薄CsBr覆盖层已经使用物理气相沉积法生长，并通过扫描隧道显微镜进行了研究。CsBr的原子分辨图像显示出在前两个原子层中形成了NaCl晶体结构，而不是CsBr的本体结构（即CsCl）。最多五个单层的结构保持相同，正在研究最大层厚度。在室温下已观察到厚度高达1.1 nm的CsBr岛的迁移性。CsBr是CsPbBr ₃钙钛矿生长的二元成分之一。探索CsBr在Ag（111）上的生长将为更好地了解CsPbBr ₃钙钛矿薄膜在相似生长条件下的生长提供参考信息。